JP2011140779A - Habitable room structure giving consideration to sound - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a habitable room structure giving consideration to a sound, which can effectively improve a frequency balance of an acoustic absorption coefficient in the state of arranging a sound absorption and diffusion body in such a manner as to prevent the narrowing of an indoor space of a habitable room section. <P>SOLUTION: In this habitable room structure giving consideration to the sound, the sound absorption and diffusion bodies 10a and 10b are provided by using a plurality of sound absorption and diffusion body units 11; and the sound absorption and diffusion bodies 10a and 10b include a frame body 12 which has an opening surface 12a opened toward the indoor space of the habitable room section, and a large number of resonance vibration grooves 14 with random depths, which are formed by arranging a large number of acoustic vibration plates 13 in parallel at predetermined intervals inside the frame body 12. In other words, the ceiling section sound absorption and diffusion body 10a is provided on the ceiling surface 20 of the habitable room section by directing the opening surface 12a of the frame body 12 downward; and the side wall section sound absorption and diffusion body 10b is provided on the side wall surface 21 of the habitable room section perpendicular to the ceiling surface 20 by directing the opening surface 12a of the frame body 12 in a lateral direction. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a room structure in consideration of sound, and in particular, a sound absorbing diffuser including a frame body and a large number of resonance vibration grooves formed by arranging a large number of acoustic diaphragms inside the frame body is provided. It is related to the room structure considering the sound.

  For example, in architectural acoustic design to make a large-scale space such as a concert hall or a theater excellent in acoustic effect, for example, as a sound absorbing material, a resonator type sound absorbing material having excellent sound absorption characteristics in the low frequency range, Various sound-absorbing materials such as plate (membrane) vibration-type sound-absorbing material with excellent sound-absorbing characteristics and porous sound-absorbing material with excellent sound-absorbing characteristics in the mid-high range are used. It has been attempted to balance the frequency characteristics of the sound absorption coefficient over the sound range.

  On the other hand, for example, in a general building such as a residential building, when a part of the room is to be a room having an excellent acoustic effect, in the room that is such a small space, In addition, it is difficult to secure a large space for forming excessive unevenness, and it is difficult to provide a resonator-type sound-absorbing material having a sufficient sound-absorbing characteristic in a low frequency range with a sufficient size and shape. In a small-scale space such as a living room, due to repetitive reflections between planes, a lack of sound absorption (excessive reverberation) tends to occur from low to high frequencies, especially excessive reverberation in the midrange (500 Hz band). Becomes easy to protrude. Furthermore, the excessive sound in the low / mid range masks the high range, making it difficult to hear the high range.

  In addition, for example, in a room for music use, as a sound absorption design at the time of interior planning, a design using a porous sound absorption material such as glass wool having excellent sound absorption characteristics in the middle / high range is often performed. When a quality type sound-absorbing material is used, for example, excessive sound absorption in a high frequency range of 1 kHz or more, for example, at a frequency included in addition to the overtone of the sound source << basic frequency (fundamental sound); Double, 3 times,..., 7 times (integer multiple)...

  Furthermore, it is known that increasing the acoustic diffusivity of the space is important for balancing the frequency characteristics of the room sound absorption coefficient. Therefore, there is almost no need to design the living room with consideration for diffusivity, and the living room is required to have a clean space structure without excessive unevenness. .

  On the other hand, in a large-scale space such as a concert hall or a theater, for example, a diffuser called a Schrader diffuser may be used as a structure that enhances the acoustic diffusivity of the space (see, for example, Non-Patent Document 1). . The Schrader diffuser arranges a large number of grooves partitioned by a rigid material having a depth based on a quasi-random pseudo-random arrangement, and arranges the openings so that they form a plane, thereby changing the acoustic impedance (discontinuity). This can be realized without using a sound absorbing material.

"Room acoustics-sound of architecture and its theory-", author, Heinrich Kuttorf, translator, Junji Fujiwara, Takayuki Hidaka, August 12, 2003, published by Ichigaya Publishing Co., Ltd.

  The Schröder diffuser is considered to have a function as a resonator (resonator) by a large number of grooves having a random volume in addition to a function as a diffuser. Therefore, by installing the Schröder diffuser in a small-scale space such as a room of a building, it becomes possible to enhance the acoustic diffusibility of the small-scale space and to exhibit a function as a sound absorbing material. It is considered possible. In addition, a room structure that can form a room space with an excellent acoustic effect by using an improved Schrader diffuser in a room of a building has been developed in Japanese Patent Application No. 2008-163615, filed by the applicant of the present application. Has been.

  The living room structure in consideration of the sound of Japanese Patent Application No. 2008-163615 includes a frame having an opening surface that opens toward the room along the wall, ceiling, or floor of the wall forming the room, and the interior of the frame. By installing a sound-absorbing diffuser consisting of a number of resonant vibration grooves with random depths formed by arranging a large number of acoustic diaphragms in parallel at a predetermined interval, The sound absorption coefficient is improved in a well-balanced manner over the sound range so that a room space with excellent acoustic effect can be formed. However, the room space becomes narrower by installing a sound absorbing diffuser along the wall surface of the room. It is necessary to further research and develop a specific arrangement of the sound-absorbing diffuser in the living room that can avoid the above-mentioned problem and can effectively improve the frequency balance of the sound absorption coefficient.

  It is an object of the present invention to provide a room structure considering sound that can effectively improve the frequency balance of the sound absorption coefficient in a state where the sound absorbing diffuser is arranged so that the indoor space of the living room portion is not narrowed. To do.

  The present invention is a random body formed by arranging a frame body having an opening surface facing a room of a living room portion and a large number of acoustic diaphragms in parallel inside the frame body at predetermined intervals. A sound-absorbing diffuser comprising a plurality of resonant vibration grooves having a depth is provided on the ceiling surface of the living room with the opening surface of the frame facing downward, and on the side of the living room perpendicular to the ceiling surface By providing a room structure that takes into account the sound provided on the wall with the opening surface of the frame facing sideways, the above-mentioned purpose is a well-balanced sound absorption rate and high sound diffusion ranging from the low frequency range to the high frequency range. Realization of sexuality.

  And it is preferable that the room structure which considered the sound of this invention is provided in the state by which the said sound-absorbing diffuser was embed | buried under the ceiling surface of a room part.

  Moreover, it is preferable that the living room structure which considered the sound of this invention is provided with the said sound absorption diffuser in the state by which at least one part was embed | buried under the side wall surface of a living room part.

  Furthermore, in the room structure considering the sound of the present invention, it is preferable that the frame of the sound absorbing diffuser has a shallow depth of 200 to 400 mm.

  Furthermore, in the living room structure considering the sound according to the present invention, the sound absorbing diffuser provided on the ceiling surface of the living room portion is provided so as to occupy an area of 20% or more of the entire area of the ceiling surface. Is preferred.

  Further, in the living room structure considering the sound according to the present invention, the sound absorbing diffuser provided on the side wall surface of the living room portion has an area of 50% or more of the area of the sound absorbing diffuser provided on the ceiling surface of the living room portion. It is preferable to be provided.

  Further, in the living room structure considering the sound according to the present invention, the both sides of each acoustic diaphragm of the sound absorbing diffuser are extended from the end of the opening surface in the depth direction of the resonance vibration groove. It is preferable that a cut is formed.

  According to the room structure in consideration of the sound of the present invention, the frequency balance of the sound absorption rate can be effectively improved in a state where the sound absorbing diffuser is arranged so that the room space of the room part is not narrowed.

It is a fragmentary perspective view explaining the structure of the room structure which considered the sound which concerns on preferable 1st Embodiment of this invention. It is sectional drawing in alignment with AA of FIG. 1 explaining the internal structure of a sound-absorbing diffuser. It is a perspective view of the sound absorption diffuser unit which comprises a sound absorption diffuser. It is a perspective view explaining the condition which forms a sound absorption diffuser. It is a plane sectional view explaining the notch formed in the both-sides edge part of an acoustic diaphragm. The structure of the room structure which considered the sound which concerns on preferable 2nd Embodiment of this invention is demonstrated, (a) is a schematic top view, (b) is a schematic plan view. The structure of the room structure which considered the sound which concerns on preferable 3rd Embodiment of this invention is demonstrated, (a) is a schematic top view, (b) is a schematic plan view. The structure of the room structure which considered the sound which concerns on preferable 4th Embodiment of this invention is demonstrated, (a) is a schematic top view, (b) is a schematic plan view. The structure of the room structure which considered the sound which concerns on preferable 5th-8th embodiment of this invention is demonstrated, (a) is a schematic top view, (b)-(e) is a schematic front view. The structure of the room structure which considered the sound which concerns on preferable 9th Embodiment of this invention is demonstrated, (a) is a schematic top view, (b)-(e) is a schematic front view. (A) is a schematic top view explaining the structure of the living room structure of the comparative example 1, (b) is a schematic top view explaining the structure of the living room structure of the comparative example 2. The structure of the room structure of the comparative example 3 is demonstrated, (a) is a schematic top view, (b) is a schematic plan view. (A)-(c) is a chart which shows the measurement result which measured the sound absorption rate and the reverberation time about the room structure of Examples 1-3. (A)-(d) is a chart which shows the measurement result which measured the sound absorption rate and the reverberation time about the room structure of Examples 4-7. It is a chart which shows the measurement result which measured the sound absorption rate and the reverberation time about the living room structure of Example 8. (A), (b) is a chart which shows the measurement result which measured the sound absorption rate and the reverberation time about the room structure of comparative examples 1 and 2. FIG. It is a chart which shows the measurement result which measured the sound absorption rate and the reverberation time about the room structure of comparative example 3.

  The living room structure in consideration of the sound according to the first preferred embodiment of the present invention shown in FIG. 1 is to make it possible to use, for example, a Western-style room with a size of about 8 tatamis in a residential building as a room part for music use, for example. The Schrader diffuser used in large-scale spaces such as concert halls and theaters is improved as a sound-absorbing diffuser 10a, 10b so that it can be applied to a small-sized room. At the same time, by attaching these sound absorbing diffusers 10a and 10b so that the indoor space of the living room is not narrowed, the frequency balance of the sound absorption rate in the living room is effectively improved.

  That is, in the living room structure in consideration of the sound of the first embodiment, the frame body 12 having the opening surface 12a opening toward the room of the living room portion, and a large number of acoustic diaphragms 13 inside the frame body 12 are predetermined. The sound absorbing diffusers 10a and 10b, which are formed by arranging a plurality of resonant vibration grooves 14 having a random depth, formed by arranging them in parallel at intervals, include a plurality of sound absorbing diffuser units 11 (see FIG. 3). The ceiling surface 20 of the living room is provided as the ceiling sound absorbing diffuser 10a with the opening surface 12a of the frame 12 facing downward, and the plurality of sound absorbing diffuser units 11 are used. A side wall sound absorbing diffuser 10b is provided on the side wall surface 21 of the vertical living room with the opening surface 12a of the frame body 12 facing sideways.

  In the first embodiment, in the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b, a large number of acoustic diaphragms 13 formed by arranging them in parallel are disposed inside the resonant vibration grooves 14 formed in parallel. As shown in FIG. 2, the back closing member 15 is provided at a random depth position, whereby a large number of resonance vibration grooves 14 have a random depth.

  In the first embodiment, the ceiling sound absorbing diffuser 10 a and the side wall sound absorbing diffuser 10 b are formed using the sound absorbing diffuser unit 11. As shown in FIG. 3, the sound-absorbing diffuser unit 11 has a substantially rectangular parallelepiped shape as a whole with a width B1 of about 800 mm, a length B2 of about 267 mm, and a depth B3 of about 200 mm, for example. .

  As shown in FIG. 4, the sound-absorbing diffuser unit 11 can be easily formed using, for example, corrugated paper 22 and a rod-shaped member 23 made of foam heat insulating material. That is, for example, a corrugated cardboard 22 having a rectangular plane shape of about 200 mm × 800 mm and a thickness of about 3 mm is used as the acoustic diaphragm 13, and the surface of the corrugated paper 22 is, for example, 40 mm long and 25 mm wide. A rod-shaped member 23 made of a foam heat insulating material having a cross section is attached to a predetermined position using an adhesive or the like as the frame member 17 and the back portion closing member 15. More specifically, the rod-like member 23 cut to a length of about 200 mm is attached as a frame member 17 along the short sides on both sides of the cardboard paper 22. Further, the rod-like member 23 cut to a length of about 740 mm is used as the back closing member 15, and both ends are abutted and joined to the inner side surfaces of the frame members 17 on both sides, and the end on the opening surface 12 a side of the acoustic diaphragm 13. It is attached to a position at a predetermined interval from one long side 22a of the corrugated paper 22 that becomes the side 13a.

  Further, the upper corrugated paper 22 is attached so as to cover the upper surfaces of the attached frame member 17 and the back closing member 15, and the same operation is repeated and stacked, for example, in six steps, so that the acoustic vibration caused by each adjacent corrugated paper 22 is obtained. The sound-absorbing diffuser unit 11 having a size and a shape that is lightweight and suitable for carrying and construction, in which resonance vibration grooves 14 having random depths are provided between the plates 13 can be easily formed ( (See FIG. 3).

  In the first embodiment, as shown in FIG. 1, for example, a plurality of sound absorbing diffuser units 11 are fitted into a pair of vertically long rectangular ceiling openings 24 formed on the ceiling surface 20 of the living room. Thus, for example, the sound-absorbing diffuser units 10a are provided in a state of being embedded in the ceiling surface 20 by arranging the sound-absorbing diffuser units 11 in a row in two rows, for example, 5 to 6 bodies in each row. Thus, a large number of frame members on both sides of each sound-absorbing diffuser unit 11 that are arranged along the long side portion of the ceiling opening 24 and that are continuously arranged integrally with the side edge of the corrugated paper 22 interposed therebetween. 17 and a rectangular outer shell formed by corrugated paper 22 ′ constituting end surfaces of the sound-absorbing diffuser units 11 disposed at both ends of each row, which are disposed along the short side portion of the ceiling opening 24. The part is made into a frame 12 having an opening surface 12a facing downward, and a ceiling part sound-absorbing diffuser 10a in which a large number of acoustic diaphragms 13 made of corrugated paper 22 are arranged in parallel inside the frame 12. Are attached to the ceiling surface 20 in two rows.

  Further, in the first embodiment, for example, 5 to 6 sound absorbing diffusion units are provided so that the plurality of sound absorbing diffuser units 11 are fitted into the vertically rectangular side wall openings 25 provided on the side wall surface 21 of the living room, for example. The side wall sound absorbing diffuser 10b is provided in a state of being embedded in the side wall surface 21 by stacking and arranging the body units 11 in the vertical direction. As a result, a large number of frame members on both sides of each of the sound absorbing diffuser units 11 that are arranged along the long side portion of the side wall opening 25 and that are continuously arranged integrally with the side edge of the corrugated paper 22 interposed therebetween. 17 and the corrugated cardboard paper 22 ′ constituting the upper end surface and the lower end surface of the sound absorbing diffuser unit 11 disposed at the uppermost and lowermost portions disposed along the upper and lower short sides of the side wall opening 25. A rectangular outer shell portion is formed as a frame body 12 having an opening surface 12a facing sideways, and a large number of acoustic diaphragms 13 made of corrugated paper 22 are arranged in parallel inside the frame body 12. The side wall sound absorbing diffuser 10 b is attached to the side wall surface 21.

  Here, in the first embodiment, the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b installed as described above have a large number of resonance vibration grooves 14 closed as shown in FIG. The inner part is closed by the member 15 and has a random depth of, for example, about 0 to 175 mm. In addition, the random depth of the large number of resonant vibration grooves 14 is preferably a depth based on a quadratic residue pseudo-random arrangement. The quadratic residue pseudo-random array is a well-known one that is employed when designing a Schrader diffuser for use in a large-scale space, for example. Preferably, a large number of resonant vibration grooves 14 are formed at a depth based on the quadratic pseudo-random arrangement, so that a well-balanced diffusivity from the low sound range to the high sound range can be obtained by the sound absorbing diffusers 10a and 10b. That is, when the volume of the resonant vibration groove 14 is random, when the sound absorbing diffusers 10a and 10b function as a resonator (resonator), sound absorption in the low to medium sound range due to plate (membrane) vibrations is achieved. With the effect and the sound absorption effect in the middle to high sound range estimated to be caused by the shape of the Schrader diffuser, it is possible to effectively improve the sound absorption rate with a good balance from the low sound range to the high sound range. The sound absorption effect in the low to medium sound range due to the vibration of the plate (membrane) is obtained by using a thin material with a thickness of about 3 mm as the acoustic vibration plate 13, so that the plate according to the resonance frequency of each resonator (resonator) ( Membrane) This is because the sound absorption function in the low to medium sound range is provided by causing vibration resonance.

  Further, in the first embodiment, as shown in FIG. 5, the resonance vibration grooves are formed on both side edges of the acoustic diaphragms 13 of the sound absorbing diffusers 10 a and 10 b from the end side 13 a on the opening surface 12 a side of the frame body 12. The cut 18 can be formed by extending in the depth direction of 14. Since the notches 18 are formed, the main body portion, which is a portion sandwiched by the notches 18 on both sides of each acoustic diaphragm 13, is supported by only one side on the back closing member 15 side, and is cantilevered. By overhanging, acoustic vibration is likely to occur. This makes it possible to further effectively improve the sound absorption coefficient due to the above-described plate (film) vibration, and to effectively improve the sound absorption coefficient particularly in the low sound range. The cut length of the cut 18 in the depth direction of the resonant vibration groove 14 can be appropriately set in consideration of the balance of sound absorption coefficient and the like.

  In the first embodiment, the corrugated cardboard 22 (acoustic diaphragm) disposed on the end surface of each sound absorbing diffuser unit 11 in a portion adjacent to the sound absorbing diffuser units 11 arranged continuously in the horizontal direction or the vertical direction. 13) are arranged in double contact with each other.

  In the first embodiment, the sound-absorbing diffuser unit 11 (see FIG. 3) having a substantially rectangular parallelepiped shape having a width B1 of about 800 mm, a length B2 of about 267 mm, and a depth B3 of about 200 mm is provided. The ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b are provided so that the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b are framed by the frame member 17 and the corrugated paper 22 'on the end surface. The body 12 has a shallow depth of about 200 mm.

  The frame body 12 of the sound absorbing diffusers 10a and 10b has a shallow depth of about 200 mm, so that the ceiling sound absorbing diffuser 10a is entirely embedded in the ceiling surface 20 of the living room and is placed on the indoor side of the living room. It can be easily installed without protruding. Further, the side wall sound-absorbing diffuser 10b can be easily installed in a state where the whole or a part of the side wall sound-absorbing diffuser 10b is embedded in the side wall surface 21 so as not to protrude as much as possible along the side wall surface 21 to the room side of the living room. become. By these, it becomes possible to avoid effectively that the indoor space of a living room part becomes narrow.

  Here, in order to install the sound absorbing diffusers 10a and 10b so that the indoor space of the living room can be effectively avoided, the frame 12 of the sound absorbing diffusers 10a and 10b is as shallow as about 200 to 400 mm. It is preferable to have a depth.

  Moreover, in this invention, it is preferable that the ceiling part sound-absorption diffuser 10a provided in the ceiling surface 20 of a living room part is provided so that an area of 20% or more of the whole area of the ceiling surface 20 may be occupied.

  Furthermore, in this invention, the side wall part sound-absorption diffuser 10b provided in the side wall surface 21 of a living room part is provided in the area of 50% or more of the area of the ceiling part sound absorption diffuser 10a provided in the ceiling surface 20 of a living room part. It is preferable that

  And according to the room structure which considered the sound of this 1st Embodiment which has the above-mentioned structure, in the state which has arrange | positioned the sound-absorbing diffuser 10a, 10b so that the indoor space of a room part may not become narrow, the frequency balance of a sound absorption coefficient Can be effectively improved.

That is, according to the first embodiment, the ceiling sound-absorbing diffuser 10a is provided as a main part of the diffuser along the ceiling surface 20, preferably in a state where the entirety is embedded in the ceiling surface 20, thereby Side wall provided along the side wall surface 21 in addition to the one-dimensional sound diffusibility of the ceiling sound absorbing diffuser 10 a provided on the ceiling surface 20. By giving the two-dimensional sound diffusibility by the partial sound-absorbing diffuser 10b, it is possible to effectively improve the frequency balance of the sound absorption coefficient in the living room. Thereby, acoustic diffusion function and sound absorption function and a sound absorbing diffuser 10a that combines, by using 10b, for example, in a wide range ranging from 63H _Z band 8KH _Z bands, good sound absorption characteristics, to have the room unit It becomes possible.

  In the first embodiment, as the sound-absorbing diffusers 10a and 10b, those having a shallow depth of about 200 mm are used in view of the ease of installation in the living room, etc. According to the Schrader theory, Although it has been described that the sound absorbing diffusers 10a and 10b having a shallow depth do not sufficiently diffuse sound in the low frequency range, in the first embodiment, the sound absorbing diffuser 10a and the sound absorbing diffuser 10b on the side wall are used. By arranging two-dimensionally along the ceiling surface 20 of the living room and the side wall surface 21 perpendicular to the ceiling surface 20, it is possible to effectively increase the sound absorption coefficient for low frequencies. It is possible to create an indoor space with a well-balanced sound absorption rate over a high frequency range.

  Here, in the early stage of architectural acoustic education and design practice, reverberation calculation (or average sound absorption coefficient calculation) is performed assuming that the symmetric space is uniformly diffused. There is no space satisfying uniform diffusion except for the reverberation chamber for calculation. The fact that the space is not uniformly diffused means that the sound absorbing effect of the sound absorbing body varies depending on the sound absorbing body to be installed and the arrangement of the diffuser. Further, it is generally known that the living room portion of a house is formed by parallel planes and causes excessive reverberation (insufficient sound absorption rate) in the midrange due to repeated plane reflection between the parallel planes. Furthermore, in the acoustic design of the space, a complicated design procedure of arranging and designing three types of sound absorbing materials such as a plate vibration type, a resonator type, and a porous type in a well-balanced manner will be taken. The published data on the average sound absorption coefficient for each frequency band measured by the reverberation room method is expected to have the sound absorption coefficient (or sound absorption capacity) as announced because the sound absorption capacity of the sound absorbing material is affected by the degree of diffusion and the arrangement of the material. Can not do it. Furthermore, a relatively small space is often not even designed for basic acoustics due to its low publicity and design constraints, and it has a deep sound absorbing material that absorbs low frequencies. It is difficult to install (sound absorbing device).

According to the first embodiment, the sound absorbing diffuser 10a, 10b is, by more effectively the sound absorbing performance possessed by itself by high diffusivity possessed by itself, bass (e.g. 63H _Z band) to high frequency range over (e.g. 8KH _Z bands), since it provided a good sound absorption balanced, without using a sound absorbing device of several kinds, sound absorbing diffusers 10a, using 10b only, to be capable of performing an effective acoustic design Become. In other words, an effective acoustic design can be achieved by a simple design method without going through the conventional complicated acoustic design procedure of designing a well-balanced design of the three types of sound absorbing mechanisms: plate vibration type, resonator type, and porous type. It becomes possible to do. Further, according to the design method proposed by Schröder, the sound absorbing diffusers 10a and 10b can be given high diffusibility.

  Furthermore, according to the present invention, by devising the arrangement of the sound absorbing diffusers 10a and 10b, it is possible to effectively improve the sound absorption rate of the room portion in a well-balanced manner from low to high ranges. It is also possible to make the sound absorbing power in the frequency band proportional to the area of use of the sound absorbing diffusers 10a and 10b.

  Thus, according to the first embodiment, by using the sound absorbing diffusers 10a and 10b having a plate vibration sound absorbing function and having both functions of diffusion and sound absorbing, the high diffusibility of the sound absorbing diffusers 10a and 10b is provided. And a simple and effective acoustic design and construction that takes into account the effect of sound field diffusion on sound absorption in a living room that is a relatively small space due to a synergistic effect with well-balanced sound absorption coefficient frequency characteristics Is possible.

  In addition, according to the present invention, the sound-absorbing diffusers 10a and 10b are made of a familiar and inexpensive material such as plywood, plastic corrugated cardboard, and wood, in addition to the above-described corrugated paper 22 and the rod-shaped member 23 made of foam heat insulating material. It can be formed easily and easily.

  6 to 8 schematically show the arrangement of the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b in the living room structure considering sound according to the second to fourth embodiments of the present invention. It is. In each embodiment, the living room portion is a Western-style room having a size of about 8 tatami mats as in the first embodiment, and the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b are the same as those described above. Similar to the first embodiment, the plurality of sound absorbing diffuser units 11 are provided by being arranged along the ceiling surface 20 and the side wall surface 21 in a state of being appropriately dispersed.

  Moreover, in FIGS. 6-8, (a) is the schematic top view which looked at the ceiling part from the downward direction. (B) is the schematic plan view which looked at the floor part from the upper part, and the room part has the state enclosed by the side wall surface 21 in 4 directions. In addition, in (a) which looked at the ceiling part from the lower side, it is shown in a state before the ceiling finishing material constituting the ceiling surface 20 is attached, and the ceiling part is extended in parallel and provided with three pieces. The upper floor beam 26 is partitioned into four regions.

  In the living room structure of the second embodiment shown in FIGS. 6A and 6B, 24 sound-absorbing diffuser units 11 are continuously arranged along the ceiling surface 20 in a dispersed state as shown in FIG. 6A. The ceiling sound absorbing diffuser 10a is configured by being disposed so as to occupy 40% of the area of the ceiling surface 20. In addition, the twelve sound absorbing diffuser units 11 are provided in the form of a bookshelf in a state where they are stacked in two rows and six stages along the central portion of one side wall surface 21, so that the side wall sound absorbing diffuser 10b is provided. Is configured.

  In the living room structure of the third embodiment shown in FIGS. 7A and 7B, as in the second embodiment, 24 sound absorbing diffuser units 11 are distributed along the ceiling surface 20 in a dispersed state. 7 (a) is arranged continuously and occupies 40% of the area of the ceiling surface 20, thereby constituting the ceiling sound absorbing diffuser 10a. Further, the 12 sound absorbing diffuser units 11 are provided in a book shelf-like manner in a state of being stacked in a row and 6 steps along two adjacent side wall surfaces 21, whereby the side wall sound absorbing diffuser 10 b is provided. Is configured.

  In the living room structure of the fourth embodiment shown in FIGS. 8A and 8B, as in the second embodiment, the 24 sound-absorbing diffuser units 11 are distributed along the ceiling surface 20 in a dispersed state. As shown in FIG. 8A, the ceiling sound absorbing diffuser 10a is configured by being continuously arranged and occupying 40% of the area of the ceiling surface 20. Further, the 12 sound absorbing diffuser units 11 are provided in the form of a bookshelf in a state where the sound absorbing diffuser units 11 are stacked in a row and 6 steps along two opposing side wall surfaces 21, respectively. 10b.

  And the effect similar to the said 1st Embodiment is show | played by the living room structure of 2nd Embodiment-4th Embodiment shown in FIGS. 6-8.

  FIGS. 9A to 9E schematically show the arrangement state of the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b in the living room structure according to the fifth to eighth embodiments of the present invention. It is shown as a figure. In each embodiment, the living room portion is a Western-style room having a size of about 8 tatami mats as in the first embodiment, and the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b are the same as those described above. Similar to the first embodiment, the plurality of sound absorbing diffuser units 11 are provided by being arranged along the ceiling surface 20 and the side wall surface 21 in a state of being appropriately dispersed.

  Moreover, in FIG. 9, (a) is the schematic top view which looked at the ceiling part in each embodiment from the downward direction. (B)-(e) demonstrates the state by which the side wall part sound-absorbing diffuser 10b is arrange | positioned along the side wall surface 21 in each embodiment, The upper stage is a front shown roughly from the side of the side wall part sound-absorbing diffuser 10b. The figure and the lower stage are the schematic front views seen from the front side wall part sound-absorbing diffuser 10b. In addition, in (a) which looked at the ceiling part from the lower side, it is shown in a state before the ceiling finishing material constituting the ceiling surface 20 is attached, and the ceiling part is extended in parallel and provided with three pieces. The upper floor beam 26 is partitioned into four regions.

  In the room structure of the fifth embodiment shown in FIGS. 9A and 9B, 24 sound absorbing diffuser units 11 are arranged in a row along the ceiling surface 20 in a dispersed state as shown in FIG. 9A. The ceiling sound absorbing diffuser 10a is configured by being disposed so as to occupy 40% of the area of the ceiling surface 20. Further, as shown in FIG. 9B, the twelve sound-absorbing diffuser units 11 are provided like a bookshelf in a state where they are stacked in two rows and six stages along the central portion of one side wall surface 21. As a result, the side wall sound absorbing diffuser 10b is configured.

  In the living room structure of the sixth embodiment shown in FIGS. 9A and 9C, as in the fifth embodiment, 24 sound absorbing diffuser units 11 are distributed along the ceiling surface 20 in a dispersed state. 9 (a) is arranged continuously and occupies 40% of the area of the ceiling surface 20, thereby constituting the ceiling sound absorbing diffuser 10a. In addition, the 12 sound absorbing diffuser units 11 are provided like a bookshelf in a state where they are stacked in a row and 6 steps along the corners on both sides of one side wall surface 21, so that the side wall portion sound absorbing unit 11 is provided. The diffuser 10b is configured.

  In the living room structure of the seventh embodiment shown in FIGS. 9A and 9D, as in the fifth embodiment, 24 sound absorbing diffuser units 11 are distributed along the ceiling surface 20 in a dispersed state. 9 (a) is arranged continuously and occupies 40% of the area of the ceiling surface 20, thereby constituting the ceiling sound absorbing diffuser 10a. In addition, the twelve sound-absorbing diffuser units 11 are stacked in three stages across the vertical central portion (for example, a portion having a height of about 1060 to 1850 mm from the floor surface) of one side wall surface 21. The side wall sound-absorbing diffuser 10b is configured by being provided in a band shape.

  In the living room structure of the eighth embodiment shown in FIGS. 9 (a) and 9 (e), as in the fifth embodiment, 24 sound absorbing diffuser units 11 are distributed along the ceiling surface 20 in a dispersed state. 9 (a) is arranged continuously and occupies 40% of the area of the ceiling surface 20, thereby constituting the ceiling sound absorbing diffuser 10a. In addition, the twelve sound-absorbing diffuser units 11 are stacked in three stages across the upper portion in the vertical direction of one side wall surface 21 (for example, a portion having a height of about 1690 to 2480 mm from the floor surface). The side wall sound-absorbing diffuser 10b is configured by being provided in a band shape.

  And the effect similar to the said 1st Embodiment is show | played by the living room structure of 5th Embodiment-8th Embodiment shown to Fig.9 (a)-(e).

  FIGS. 10A to 10C schematically show the arrangement state of the ceiling sound absorbing diffuser 10a and the side wall sound absorbing diffuser 10b in the living room structure in consideration of sound according to the ninth embodiment of the present invention. Is. In the ninth embodiment, like the living room structure of the seventh embodiment, 24 sound-absorbing diffuser units 11 are arranged continuously along the ceiling surface 20 in a dispersed state as shown in FIG. In addition, the ceiling sound-absorbing diffuser 10a is configured by occupying 40% of the area of the ceiling surface 20. Further, the twelve sound-absorbing diffuser units 11 traverse the central portion in the vertical direction of one side wall surface 21 (for example, a portion having a height of about 1060 to 1850 mm from the floor surface), as shown in FIGS. ), The side wall sound-absorbing diffuser 10b is configured.

  And the effect similar to the said 1st Embodiment is show | played also by the living room structure of 9th Embodiment shown to Fig.10 (a)-(c).

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, a large number of acoustic diaphragms do not necessarily have to be arranged in parallel to the direction perpendicular to the opening surface of the frame, and may be arranged in a direction that obliquely intersects with the opening surface of the frame. . Further, the opening surface of the frame body whose opening surface opens toward the room does not necessarily have to be opened in a rectangular shape, and may be opened in various other shapes. Furthermore, the random depths of the multiple resonant vibration grooves do not necessarily have to be random depths due to the quadratic pseudo-random arrangement.

  Hereinafter, although the living room structure in consideration of the sound of the present invention will be described in more detail by examples and comparative examples, the present invention is not limited to these.

[Examples 1 to 3]
The living room structure having the same configuration as the living room structure considering the sound of the second embodiment is defined as the living room structure of Example 1. The living room structure having the same configuration as the living room structure considering the sound of the third embodiment is defined as the living room structure of Example 2. The living room structure having the same configuration as the living room structure considering the sound of the fourth embodiment is defined as the living room structure of Example 3. About the living room structure of Examples 1-3, the average sound absorption rate and the reverberation time were measured with the measuring method of the average sound absorption rate and the reverberation time mentioned later. The measurement results are shown in FIGS. In addition, in each figure, the measurement result of the average sound absorption rate and reverberation time measured about each room structure before installing a sound-absorbing diffuser is also written together.

[Examples 4 to 7]
The living room structure having the same configuration as the living room structure considering the sound of the fifth embodiment is defined as the living room structure of Example 4. The living room structure having the same configuration as the living room structure considering the sound of the sixth embodiment is defined as the living room structure of Example 5. The living room structure having the same configuration as that of the living room structure considering the sound of the seventh embodiment is defined as the living room structure of Example 6. The living room structure having the same configuration as the living room structure considering the sound of the eighth embodiment is defined as the living room structure of Example 7. About the room structure of Examples 4-7, the average sound absorption rate and reverberation time were measured with the measuring method of the average sound absorption rate and reverberation time mentioned later. The measurement results are shown in FIGS. In addition, in each figure, the measurement result of the average sound absorption rate and reverberation time measured about each room structure before installing a sound-absorbing diffuser is also written together.

Example 8
The living room structure having the same configuration as the living room structure considering the sound of the ninth embodiment is defined as the living room structure of Example 8. About the room structure of Example 8, the average sound absorption rate and the reverberation time were measured by the measuring method of the average sound absorption rate and reverberation time mentioned later. The measurement results are shown in FIG. In addition, in FIG. 15, the measurement result of the average sound absorption rate and reverberation time which were measured about the room structure before installing a sound-absorbing diffuser is also written together.

[Comparative Examples 1 and 2]
Without providing the side wall sound absorbing diffuser 10b, as shown in FIG. 11 (a), twelve sound absorbing diffuser units 11 are arranged in a row so that the area of the ceiling surface 20 is 20%. The room structure provided with the ceiling sound-absorbing diffuser 10a so as to occupy is the room structure of Comparative Example 1. Without providing the side wall sound absorbing diffuser 10b, as shown in FIG. 11 (b), 24 sound absorbing diffuser units 11 are continuously arranged in two rows so that the area of the ceiling surface 20 is 40% of the area. The room structure provided with the ceiling sound absorbing diffuser 10a so as to occupy was defined as the room structure of Comparative Example 2. About the room structure of the comparative examples 1 and 2, the average sound absorption rate and reverberation time were measured with the measuring method of the average sound absorption rate and reverberation time mentioned later. The measurement results are shown in FIGS. 16 (a) and 16 (b). In addition, in each figure, the measurement result of the average sound absorption rate and reverberation time measured about each room structure before installing a sound-absorbing diffuser is also written together.

[Comparative Example 3]
As shown in FIGS. 12 (a) and 12 (b), the side wall sound-absorbing diffuser 10b of the living room structure of the second embodiment is covered with an opening 12a of the frame 12 by a 9mm-thick plywood 27. The living room structure in which the ceiling sound absorbing diffuser 10a is allowed to function without functioning as the sound absorbing diffuser is the living room structure of Comparative Example 3. About the room structure of the comparative example 3, the average sound absorption rate and reverberation time were measured with the measuring method of the average sound absorption rate and reverberation time mentioned later. The measurement results are shown in FIG. In addition, in FIG. 17, the measurement result of the average sound absorption rate and reverberation time which were measured about the room structure before installing a sound-absorbing diffuser is also written together.

[Measurement method of average sound absorption rate and reverberation time]
The average sound absorption coefficient and the reverberation time are measured using a digital reverberation measuring instrument (YAMAHA & Accor AS-2), a microphone, and a speaker with a built-in amplifier. First, the reverberation time for each 1/1 octave frequency band measured by the digital reverberation measuring instrument (the time until the acoustic energy density after the sound source stops becomes 10 ⁻⁶ times (= −60 dB) after steady state) is obtained. That is, a signal is generated from a digital reverberation measuring device and output from a speaker, and sound is received at several points in the room by a microphone, and an average value of each point is obtained by the digital reverberation measuring device. Measurement is performed in eight bands of a 1/1 octave center frequency of 63 Hz to 8 kHz, and an average value is calculated for each measurement point to obtain the reverberation time of the room. Next, the average reverberation time, the room volume, and the entire area of the indoor wall surface are applied to Sabin's reverberation formula to calculate the average sound absorption coefficient. The principle of this reverberation time measuring instrument (impulse inverse integration method) is also described in M.S. R. Based on Schröder's idea.

  According to the measurement results of the average sound absorption coefficient of Examples 1 to 8 and Comparative Examples 1 to 3, the ceiling sound absorbing diffuser 10a is provided on the ceiling surface 20 of the living room, and the side wall sound absorption is provided on the side wall 21 of the living room. It turns out that the living room structure which considered the sound of Examples 1-8 which provided the diffuser 10b has improved the frequency balance of a sound absorption coefficient effectively. Further, the living room structure of Examples 6 and 8 in which the side wall sound-absorbing diffuser 10b is provided in a strip shape, preferably at a height of, for example, about 1060 to 1850 mm from the floor surface at the central portion in the vertical direction of the side wall surface 21. According to the above, it is found that the frequency balance of the sound absorption rate is further effectively improved.

10a Ceiling sound absorbing diffuser 10b Side wall sound absorbing diffuser 11 Sound absorbing diffuser unit 12 Frame 12a Open surface 13 of frame body Acoustic diaphragm 13a Edge 14 on the opening surface side of acoustic diaphragm Resonant vibration groove 15 Back block member 20 Ceiling surface 21 Side wall surfaces 22, 22 'Corrugated paper 22a One long side of corrugated paper 23 Bar-shaped member 24 made of foam heat insulating material Ceiling opening 25 Side wall opening 26 Floor beam 27 Plywood

Claims (7)

  It has a random depth formed by arranging a frame with an opening surface facing the room of the living room and a large number of acoustic diaphragms arranged in parallel inside the frame at a predetermined interval. A sound absorbing diffuser comprising a plurality of resonant vibration grooves is provided on the ceiling surface of the living room with the opening surface of the frame facing downward, and the frame is formed on the side wall surface of the living room perpendicular to the ceiling surface. Living room structure that takes into account the sound provided with the body's opening side facing sideways.   The room structure considering the sound according to claim 1, wherein the sound absorbing diffuser is provided in a state of being embedded in a ceiling surface of the room part.   The room structure in consideration of the sound according to claim 1 or 2 with which said sound-absorbing diffuser is provided in the state where at least one copy was embedded in the side wall surface of a room part.   The room structure considering the sound according to any one of claims 1 to 3, wherein a frame of the sound absorbing diffuser has a shallow depth of 200 to 400 mm.   The sound absorbing diffuser provided on the ceiling surface of the living room is provided so as to occupy an area of 20% or more of the entire area of the ceiling surface. Living room structure.   6. The sound according to claim 5, wherein the sound absorbing diffuser provided on the side wall surface of the living room is provided with an area of 50% or more of the area of the sound absorbing diffuser provided on the ceiling surface of the living room. Living room structure.   7. The slit according to claim 1, wherein notches are formed in both side edges of each acoustic diaphragm of the sound absorbing diffuser so as to extend in the depth direction of the resonant vibration groove from the end on the opening surface side. Living room structure that takes into account the acoustics of crab.

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