CN115426586A - Sound production device and electronic equipment - Google Patents
Sound production device and electronic equipment Download PDFInfo
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- CN115426586A CN115426586A CN202210772406.6A CN202210772406A CN115426586A CN 115426586 A CN115426586 A CN 115426586A CN 202210772406 A CN202210772406 A CN 202210772406A CN 115426586 A CN115426586 A CN 115426586A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The application discloses a sound generating device and an electronic device with the same, wherein the sound generating device comprises a shell, a sound outlet is formed in the side wall of the shell, and the shell comprises a first shell and a second shell; the sounding monomer is arranged in the shell and forms a front sound cavity with the first shell, and the front sound cavity is communicated with the sound outlet; wherein, the one end that the sound outlet was kept away from to at least first casing is equipped with sound absorption portion, and sound absorption portion is equipped with the aerogel material layer towards the surface of sound outlet. According to the sound generating device provided by the embodiment of the invention, the sound absorbing part is arranged at one end of the first shell far away from the sound outlet, the aerogel material layer is arranged on the surface of one side of the sound absorbing part facing the sound outlet, and the aerogel material layer has a microporous structure and has air permeability and sound absorption effects, so that the reflection effect of the shell wall on the opposite side of the sound outlet on sound waves of the front sound cavity can be reduced, the resonance peak valley is reduced, and the acoustic performance of the sound generating device is improved.
Description
Technical Field
The application relates to the technical field of electroacoustic, more specifically relates to a sound generating device and have its electronic equipment.
Background
In the field of speakers, in the case of a side-emitting sound-emitting device, sound wave reflection occurs in a front cavity of the sound-emitting device, and the sound wave reflection mainly refers to a reflection effect of a shell at the opposite end of a side-emitting port on sound waves. Due to the interference of the reflected waves, the FR curve will have many peaks and valleys, resulting in a poor listening experience for the user. The longer the front cavity, i.e. the farther the side sound outlet is from the opposite side housing, the more pronounced the interference effect of the reflected waves is, and the more the acoustic performance of the sound generating device is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the present invention to provide a sound emitting device having good acoustic performance.
The invention also aims to provide the electronic equipment consisting of the sound production device.
In order to achieve the above object, the present invention provides the following technical solutions.
A sound generating apparatus according to an embodiment of a first aspect of the present invention includes: the sound outlet is formed in the side wall of the shell, and the shell comprises a first shell and a second shell; the sounding monomer is arranged in the shell and forms a front sound cavity with the first shell, and the front sound cavity is communicated with the sound outlet; wherein, at least the first casing is kept away from the one end of sound outlet is equipped with sound absorption portion, sound absorption portion towards the surface of sound outlet is equipped with the aerogel material layer.
According to some embodiments of the invention, at least the sound absorption portion is made of the aerogel material.
According to some embodiments of the invention, the first housing is integrally prepared from the aerogel material.
According to some embodiments of the present invention, the first casing includes a frame and a metal sheet embedded in the frame, the metal sheet is disposed opposite to the sound generating unit, the sound absorbing portion is disposed in the frame, and the frame is made of the aerogel material.
According to some embodiments of the invention, the framework of the aerogel comprises an organic polymer that is at least one of polyimides, polyamides, polyesters, aldehydes, polyolefins, polysaccharides, and silicones.
According to some embodiments of the invention, the sound absorbing part further comprises a reinforcing material, the reinforcing material being present in an amount of 0 to 30% by mass based on the total weight of the sound absorbing part.
According to some embodiments of the invention, the reinforcing material is reinforcing fibers and/or reinforcing particles, wherein the reinforcing fibers are at least one of chopped fibers, continuous fibers, and the reinforcing particles are at least one of inorganic particles of boron nitride, silicon carbide, carbon black, or metal particles.
According to some embodiments of the invention, the sound absorbing part further comprises an acoustic improvement material, the acoustic improvement material being present in an amount of 0-40% by mass based on the total weight of the sound absorbing part.
According to some embodiments of the invention, the acoustic enhancement material is at least one of zeolites, molecular sieves, activated carbon, MOFs, porous alumina and porous silica.
According to some embodiments of the invention, the sound absorbing part is made of at least one of PC and modified materials thereof, PA and modified materials thereof, PPS and modified materials thereof, PP and modified materials thereof, ABS and modified materials thereof, LCP and modified materials thereof, PEI and modified materials thereof, phenol resin and modified materials thereof, epoxy resin and modified materials thereof, unsaturated polyester and modified materials thereof, stainless steel and aluminum alloy, magnesium alloy, and metal matrix composite.
According to some embodiments of the invention, the sound absorbing part has open channels, and the porosity of the sound absorbing part is 40% -95%.
According to some embodiments of the invention, the pore size of the open-cell channel is between 50nm and 200 μm.
According to some embodiments of the invention, the density of the sound absorbing part is 0.2g/cm 3 -1.0g/cm 3 。
According to some embodiments of the invention, the sound absorbing part has an overall specific modulus of greater than 2GPa cm 3 /g。
According to some embodiments of the invention, a distance between an end of the first casing far away from the sound outlet and a central position of the sounding single body is not less than 8.5mm.
The electronic equipment according to the second aspect of the embodiment of the present invention includes the sound generating device according to the above-described embodiment.
According to the sound production device provided by the embodiment of the invention, the sound absorption part is arranged at one end of the first shell far away from the sound outlet, the aerogel material layer is arranged on the surface of one side of the sound absorption part facing the sound outlet, and the aerogel material layer has a microporous structure and has air permeability and sound absorption effects, so that the reflection effect of the shell wall on the opposite side of the sound outlet on sound waves of the front sound cavity can be reduced, the reflection wave energy of the shell wall is reduced, the resonance peak valley is reduced, and the acoustic performance of the sound production device is improved.
Further features of the present application and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;
fig. 2 is a partial structural schematic diagram of a first housing of a sound emitting device according to an embodiment of the invention;
fig. 3 is a graph comparing FR curves of a housing provided according to an embodiment of the present invention and a housing provided by a comparative example.
Reference numerals:
a sound generating device 100;
a housing 10; a first housing 11; a frame 101; a metal sheet 102;
a front acoustic chamber 111; a sound outlet 112, a sound absorbing part 113;
a second housing 12; a rear acoustic chamber 121;
and a sounding unit 20.
Detailed Description
Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
First, the sound generating apparatus 100 according to the embodiment of the present invention will be described in detail with reference to the drawings.
As shown in fig. 1, a sound generating device 100 according to an embodiment of the present invention includes a housing 10 and a sound generating unit 20.
Specifically, a sound outlet 112 is arranged on a side wall of the housing 10, the housing 10 includes a first shell 11 and a second shell 12, in this embodiment, the sound outlet 112 is arranged on the side wall of the first shell 11, the sound generating unit 20 is arranged in the housing 10 and forms a front sound cavity 111 with the first shell 11, and the front sound cavity 111 is communicated with the sound outlet 112. At least one end of the first housing 11 away from the sound outlet 112 is provided with a sound absorption portion 113, and an aerogel material layer is disposed on a surface of the sound absorption portion 113 facing the sound outlet 112. It is understood that the sound outlet 112 may be disposed on the second housing 12 or formed by the first housing 11 and the second housing 12, and the sound outlet 112 may be disposed in various manners, which is not limited herein.
In other words, the sound generating apparatus 100 according to the embodiment of the present invention mainly includes two parts, namely, a housing 10 and a sound generating unit 20, wherein the housing 10 mainly includes two parts, namely, a first housing 11 and a second housing 12, a receiving cavity for mounting the sound generating unit 20 is defined in the housing 10, the sound generating unit 20 is disposed in the receiving cavity and divides the receiving cavity into two parts, the sound generating unit 20 cooperates with the first housing 11 to form a front sound cavity 111, the sound generating unit 20 cooperates with the first housing 11 and the second housing 12 to form a rear sound cavity 121, one end of the first housing 11 is provided with a sound outlet 112 communicating with the front sound cavity 111, and the sound outlet 112 is used for radiating sound waves of the front sound cavity 111 to the outside. The other end of the first housing 11 is provided with a sound absorbing portion 113 at a position opposite to the sound outlet 112, one side of the sound absorbing portion 113 faces the sound outlet 112, and an aerogel material layer is provided on a surface of one side of the sound absorbing portion 113 facing the sound outlet 112. The first housing 11 and the sound absorbing unit 113 may be integrally formed of the same material, or may be formed of different materials.
It should be noted that the aerogel material is a solid material with large porosity and high specific surface area, the bulk of the aerogel material is mostly made of air, the aerogel material has a microporous structure and has strong micro-ventilation and sound absorption effects, the surface of the sound absorption part 113 is provided with an aerogel material layer, which can absorb sound waves reaching the opposite side of the sound outlet 112 from the front sound cavity 111, reduce the reflected wave energy of the housing wall of the first housing 11 to the aerogel material layer, reduce the standing wave of the front sound cavity 111, and thus achieve the effect of reducing the resonance peak valley.
Therefore, according to the sound generating apparatus 100 of the embodiment of the present invention, by providing the sound absorbing portion 113 at one end of the first casing 11 away from the sound outlet 112, and providing the aerogel material layer on a surface of the sound absorbing portion 113 on a side facing the sound outlet 112, the aerogel material layer has a microporous structure and has air permeability and sound absorption effects, so as to absorb the sound wave from the front sound cavity 111 to the opposite side of the sound outlet 112, reduce the reflected wave energy of the casing wall of the first casing 11 to the aerogel material layer, reduce the standing wave of the front sound cavity 111, thereby reducing the resonance peak valley and improving the acoustic performance of the sound generating apparatus.
According to one embodiment of the present invention, at least the sound absorbing portion 113 is made of an aerogel material.
In other words, the aerogel material layer may be only one sound absorbing material layer coated on the sound absorbing part 113, that is, when the outer shell 10 is prepared, the first casing 11 and the sound absorbing part 113 are prepared, and then the aerogel material layer is coated on the side of the sound absorbing part 113 facing the sound outlet 112. Alternatively, the whole sound absorbing portion 113 may be made of an aerogel material layer.
Therefore, by making the sound absorbing portion 113 entirely of aerogel material, the sound absorbing effect of the sound absorbing portion 113 can be further improved, the reflection of the front cavity sound waves by the housing wall on the side opposite to the sound outlet from the sound outlet 112 can be reduced, the resonance peak-valley of the sound generating apparatus 100 can be reduced, and the acoustic performance of the sound generating apparatus 100 can be further improved.
In some alternative embodiments of the present invention, the first housing 11 is entirely made of aerogel material.
That is to say, except that the whole of sound absorbing portion 113 is prepared by the aerogel material, the whole of first casing 11 is also prepared by the aerogel material, and this structure can avoid first casing 11 of independent shaping and sound absorbing portion 113 with sound absorbing portion 113 and first casing 11 integrated into one piece, has improved preparation efficiency to can guarantee the overall structure stability of first casing 11.
Alternatively, in other embodiments of the present invention, the first casing 11 includes a frame 101 and a metal sheet 102 embedded in the frame 101, the metal sheet 102 is disposed opposite to the sound generating unit 20, the sound absorbing portion 113 is disposed in the frame 101, and the frame 101 is made of aerogel material.
As shown in fig. 2, in the present embodiment, the first housing 11 is mainly composed of two parts, namely, a frame 101 and a metal sheet 102, wherein the frame 101 constitutes a main structure of the first housing 11, and the frame 101 may be made of aerogel material, and the sound absorbing part 113 is formed on a part of the frame 101 far away from the sound outlet 112. The metal sheet 102 is embedded inside the frame 101, and the metal sheet 102 may be used to further enhance the strength of the first housing 11, so as to meet the rigidity requirement of the casing 10.
According to one embodiment of the present invention, the skeleton of the aerogel comprises an organic polymer, the organic polymer being at least one of polyimides, polyamides, polyesters, aldehydes, polyolefins, polysaccharides, and silicones.
Specifically, the aerogel refers to a nano-scale porous solid material formed by replacing a liquid phase in a gel with gas after drying by a sol-gel method, and the aerogel has the property of a gel. In this application, organic aerogel's skeleton can be for an aerogel that adopts polymer organic material to make, not only has porous and light in weight's characteristic, compares in inorganic aerogel material, still has certain intensity, is applicable to the shell 10 that the preparation has the sound generating mechanism that certain mechanics required. In practical application, one or more of the organic polymer materials can be selected according to the practical requirements of the functional shell.
In some embodiments of the present invention, the sound absorbing part 113 further comprises a reinforcing material, and the reinforcing material is 0 to 30% by mass of the total weight of the sound absorbing part 113.
That is, the proportion of the reinforcing material in the sound absorbing portion 113 may be 0, that is, the whole sound absorbing portion 113 is made of an aerogel material, the sound absorbing portion 113 may be filled with the reinforcing material, and the proportion of the reinforcing material in the sound absorbing portion 113 may be 1%, 5%, 10%, 20%, 30%, or the like.
Optionally, the reinforcing material is reinforcing fibers and/or reinforcing particles, wherein the reinforcing fibers are at least one of chopped fibers and continuous fibers, the fiber-based reinforcing material can also be a fabric or a non-woven fabric, and the reinforcing particles are at least one of inorganic particles of boron nitride, silicon carbide, carbon black or metal particles.
The modulus of the product can be increased to a certain extent by increasing the reinforcing materials, the usage amount of the reinforcing materials is too low, the rigidity of the product is not obviously improved, the usage amount of the reinforcing materials is too high, and the acoustic performance of the product is influenced although the rigidity of the product is obviously improved. According to the housing 10 of the embodiment of the invention, by selecting appropriate reinforcing fibers or reinforcing particles, the influence of the reinforcing material on the acoustic performance can be reduced on the basis of ensuring the rigidity of the product.
According to some embodiments of the present invention, the sound absorbing part 113 further contains an acoustic improvement material, and the acoustic improvement material is 0 to 40% by mass of the total weight of the sound absorbing part 113.
In other words, the proportion of the acoustic improvement material in the sound absorbing portion 113 may be 0, that is, the whole of the sound absorbing portion 113 is made of aerogel material, the sound absorbing portion 113 may be filled with the acoustic improvement material, and the proportion of the acoustic improvement material in the sound absorbing portion 113 may be 1%, 5%, 10%, 20%, 30%, 40%, and the like.
Optionally, the acoustic enhancement material is at least one of zeolites, molecular sieves, activated carbon, MOFs, porous alumina and porous silica. The sound-improving material generally has a tunnel structure, and the sound-absorbing effect of the sound-absorbing portion 113 can be further improved by adding the sound-improving material to the sound-absorbing portion 113, thereby further improving the acoustic performance of the sound-generating apparatus 100.
In some embodiments of the present invention, the sound absorbing part 113 is made of at least one of PC and a modified material thereof, PA and a modified material thereof, PPS and a modified material thereof, PP and a modified material thereof, ABS and a modified material thereof, LCP and a modified material thereof, PEI and a modified material thereof, a phenol resin and a modified material thereof, an epoxy resin and a modified material thereof, unsaturated polyester and a modified material thereof, stainless steel and aluminum alloy, magnesium alloy, and metal matrix composite.
That is, the sound absorbing part 113 main body may be prepared from the above-described materials. The sound absorbing part 113 according to the above embodiment of the present invention can be manufactured in various ways, and has strong practicability, while satisfying the requirements of product rigidity and light weight, and taking into account the influence on acoustic performance.
According to an embodiment of the present invention, the sound absorbing part 113 has open channels, and the porosity of the sound absorbing part 113 is 40% -95%, for example, 40%, 45%, 50%, 60%, 80%, 90%, etc.
Alternatively, the pore size of the open-cell channels is 50nm-200 μm, and may be, for example, 50nm, 100nm, 500nm, 1 μm, 50 μm, 100 μm, 200 μm, or the like.
Through the opening channel arranged in the sound absorption part 113, the propagation resistance of sound waves in the sound absorption part 113 can be reduced to a certain extent by the opening channel, and if the porosity of the sound absorption part 113 is too large, the overall modulus of the sound absorption part 11 is low, and the rigidity requirement is difficult to meet; the increase of the aperture of the open-pore channel will result in a loose structure of the housing 10, and the resistance in the process of sound wave transmission is small, which is not favorable for the absorption loss of sound energy.
Therefore, according to the sound generating device 100 of the embodiment of the present invention, the sound absorbing part 113 is provided with the hole, and the porosity of the sound absorbing part 113 and the pore diameter of the hole are controlled, so that the sound absorbing effect of the sound absorbing part 113 can be improved on the basis of meeting the rigidity requirement of the housing 10.
In some embodiments of the present invention, the density of the sound absorbing part 113 is 0.2g/cm 3 -1.0g/cm 3 . Preferably, the density of the sound-absorbing part 113 may be 0.3g/cm 3 -0.8g/cm 3 In the meantime. For example, the functional shell may have a density of 0.2g/cm 3 、0.3g/cm 3 、0.5g/cm 3 g、 0.6g/cm 3 、0.8g/cm 3 、1.0g/cm 3 And the like.
Since the density of the sound absorbing part 113 directly affects the weight of the sound absorbing part 113 and the whole housing 10, if the density of the sound absorbing part 113 is too low, the rigidity of the sound absorbing part 113 is low, and the requirement of the rigidity of the whole housing 10 is difficult to satisfy; if the density of the sound absorbing portions 113 is too high, the weight of the entire housing 10 becomes large, which is disadvantageous for the light and thin design of the product. According to the invention, the density of the sound absorption part 113 is limited within a certain range, so that the weight of the shell 10 can be reasonably controlled on the basis of ensuring the rigidity requirement of the shell 10, and the product design requirement is further met.
Alternatively, according to an embodiment of the present invention, the overall specific modulus of the sound absorbing part 113 is greater than 2GPa · cm 3 (ii) in terms of/g. Therefore, according to the sound generating device 100 of the embodiment of the present invention, by limiting the overall specific modulus of the sound absorbing portion 113, not only the modulus of the product can be ensured, but also resonance can be avoided, and the acoustic performance of the product can be improved.
For electronic equipment such as a mobile phone and the like, the SPK size is small, the size of the front cavity is small, so that the interference of reflected waves has little influence on listening experience after the resonance peak valley is 10 KHz. However, for devices such as VR, the SPK size is large, the front cavity size is narrow and long, the frequency point with peaks and valleys is at the intermediate frequency of 4kHz to 8kHz, and interference of reflected waves can significantly affect listening experience of a user.
In view of the above, in some embodiments of the present invention, the distance between the end of the first casing 11 away from the sound outlet 112 and the center of the sound generating unit 20 is not less than 8.5mm.
Specifically, when the distance between the end of the first casing 11 far from the sound outlet 112 and the center of the sound generating unit 20 is about 8.5mm, a standing wave phenomenon occurs after 10KHz, and in this frequency band, the human ear is not sensitive to the sound and does not affect the listening effect. When the distance between the end of the first casing 11 far from the sound outlet 112 and the center of the sound generating unit 20 is greater than 8.5mm, a standing wave phenomenon occurs within 10KHz, which may seriously affect the listening experience of the user. According to the sound generating device 100 of the embodiment of the invention, the distance between the end of the first casing 11 far away from the sound outlet 112 and the center of the sound generating unit 20 is set to be greater than or equal to 8.5mm, so that the listening experience of the user can be obviously improved.
The electronic device according to the embodiment of the present invention includes the sound generating apparatus according to the above embodiment, wherein the electronic device may be a mobile phone, a notebook computer, a tablet computer, a VR (virtual reality) device, an AR (augmented reality) device, a TWS (true wireless bluetooth) headset, a smart speaker, and the like, which is not limited in this application.
Since the sound generating device 100 according to the above embodiment of the present invention has the above technical effects, the electronic device according to the embodiment of the present invention also has corresponding technical effects, that is, the sound absorbing effect is better, and the overall listening sensation of the product can be effectively improved.
The sound generating device 100 of the present invention will be described in detail below with reference to specific examples and comparative examples.
Examples
Firstly synthesizing polyimide hydrogel, then adding a reinforcing material and uniformly mixing, wherein the reinforcing material is chopped carbon fiber and accounts for 25% by mass.
The polyimide hydrogel mixed with the reinforcing material was injected into a mold to be press-molded, freeze-dried and then imidized, to prepare a sound absorbing part 113 having a sound absorbing function, the sound absorbing part 113 having an overall thickness of 0.5mm and an open porosity of 45%. After the sound absorbing part 113 is prepared, the first housing 11 is assembled with a plastic case prepared using a conventional material. The sound absorbing portion 113 is coupled to an end of the first housing 11 away from the sound outlet 112.
Comparative example
In the comparative example, the specific manufacturing process of the first housing 11 was as follows: the front cavity shell of the GF integrated injection molding module is formed by PC plus 20 percent, and the thickness is 0.5mm.
The sound-emitting devices 100 obtained in the examples and comparative examples were subjected to acoustic tests, respectively, to obtain FR plots as shown in fig. 3, in which the solid line represents the FR plot of the sound-emitting device 100 using the aerogel material layer in the examples, and the broken line represents the FR plot of the sound-emitting device using the PC material in the comparative examples. In the FR curve, the abscissa represents frequency (Hz) and the ordinate represents loudness (dB).
As can be seen from fig. 3, the first casing 11 of the sound absorbing part 113 made of aerogel material in the embodiment can cut the standing wave, so that the FR curve is smoother and the peak-to-valley difference is 23.8dB.
In the comparison example, the first shell 11 made of the PC material is adopted, the reflected wave of the first shell is superposed with the normal sound wave to form standing wave, so that the loudness of the sounding device is reduced between 4KHz and 5KHz, the difference value of the FR curve frequency response peak valley is too large and reaches 31.4dB, and the integral hearing is influenced.
As can be seen from the above comparison results, according to the sound generating apparatus 100 of the embodiment of the present invention, by providing the sound absorbing portion 113 on the first casing 11 and providing the aerogel material layer on the surface of the sound absorbing portion 113 facing the sound outlet 112, the energy of the reflected wave from the casing wall to the front sound cavity 111 can be reduced, so as to reduce the resonance peak valley and improve the acoustic performance of the sound generating apparatus.
Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the application is defined by the appended claims.
Claims (16)
1. A sound generating device, comprising:
the sound outlet is formed in the side wall of the shell, and the shell comprises a first shell and a second shell;
the sounding monomer is arranged in the shell and forms a front sound cavity with the first shell, and the front sound cavity is communicated with the sound outlet;
wherein, at least the first casing is kept away from the one end of sound outlet is equipped with sound absorption portion, sound absorption portion towards the surface of sound outlet is equipped with the aerogel material layer.
2. The sound generating apparatus according to claim 1, wherein at least said sound absorbing portion is made of said aerogel material.
3. The sound generating apparatus of claim 2, wherein the first housing is integrally formed from the aerogel material.
4. The sound generating device according to claim 2, wherein the first housing comprises a frame and a metal sheet embedded in the frame, the metal sheet is opposite to the sound generating unit, the sound absorbing portion is disposed on the frame, and the frame is made of aerogel material.
5. The housing of a sound generating apparatus according to claim 1, wherein the skeleton of the aerogel includes an organic polymer, and the organic polymer is at least one of polyimide, polyamide, polyester, aldehyde, polyolefin, polysaccharide, and silicone.
6. The sound-generating apparatus according to claim 2, wherein said sound-absorbing portion further comprises a reinforcing material, and said reinforcing material is 0 to 30% by mass based on the total weight of said sound-absorbing portion.
7. The sound generating apparatus according to claim 6, wherein the reinforcing material is reinforcing fibers and/or reinforcing particles, wherein the reinforcing fibers are at least one of chopped fibers and continuous fibers, and the reinforcing particles are at least one of inorganic particles of boron nitride, silicon carbide, carbon black or metal particles.
8. The sound-generating apparatus according to claim 2, wherein the sound-absorbing portion further contains an acoustic improvement material, and the acoustic improvement material is contained in an amount of 0 to 40% by mass based on the total weight of the sound-absorbing portion.
9. The sound generating apparatus of claim 8, wherein the acoustically improving material is at least one of zeolites, molecular sieves, activated carbon, MOFs, porous alumina, and porous silica.
10. The sound emitting device according to claim 2, wherein said sound absorbing portion is made of at least one of PC and modified materials thereof, PA and modified materials thereof, PPS and modified materials thereof, PP and modified materials thereof, ABS and modified materials thereof, LCP and modified materials thereof, PEI and modified materials thereof, phenol resin and modified materials thereof, epoxy resin and modified materials thereof, unsaturated polyester and modified materials thereof, stainless steel and aluminum alloy, magnesium alloy, and metal matrix composite.
11. The sound-generating apparatus as claimed in claim 1, wherein the sound-absorbing portion has an open channel, and the porosity of the sound-absorbing portion is 40-95%.
12. The sound-emitting device according to claim 11, wherein the pore size of the open-cell channel is 50nm-200 μm.
13. The sound-generating apparatus according to claim 2, wherein the density of the sound-absorbing portion is 0.2g/cm 3 -1.0g/cm 3 。
14. The sound generating apparatus of claim 2, wherein the sound generating means comprises a speakerThe whole specific modulus of the sound absorbing part is more than 2GPa cm 3 /g。
15. The sound generating apparatus as claimed in claim 1, wherein a distance between an end of the first casing remote from the sound outlet and a central position of the sound generating unit is not less than 8.5mm.
16. An electronic device characterized by comprising a sound emitting apparatus according to any one of claims 1 to 15.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210772406.6A CN115426586A (en) | 2022-06-30 | 2022-06-30 | Sound production device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210772406.6A CN115426586A (en) | 2022-06-30 | 2022-06-30 | Sound production device and electronic equipment |
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| CN202210772406.6A Pending CN115426586A (en) | 2022-06-30 | 2022-06-30 | Sound production device and electronic equipment |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653119A (en) * | 2002-03-20 | 2005-08-10 | 法国原子能委员会 | Hydrocarbon copolymer or polymer based aerogel and method for the preparation thereof |
| US9068346B1 (en) * | 2010-08-20 | 2015-06-30 | The Board Of Regents Of The University Of Texas System | Acoustic attenuators based on porous nanostructured materials |
| CN109874089A (en) * | 2019-01-25 | 2019-06-11 | 歌尔股份有限公司 | Aerosil sound-absorbing material and sounding device |
| CN111163395A (en) * | 2020-01-02 | 2020-05-15 | 歌尔股份有限公司 | Sound-absorbing particle, sound-generating device, and electronic apparatus |
| CN213186536U (en) * | 2020-10-29 | 2021-05-11 | 歌尔股份有限公司 | Sound generating device and head-mounted electronic equipment |
| WO2021135875A1 (en) * | 2020-01-02 | 2021-07-08 | 歌尔股份有限公司 | Sound-absorbing particles, sound production device and electronic equipment |
-
2022
- 2022-06-30 CN CN202210772406.6A patent/CN115426586A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1653119A (en) * | 2002-03-20 | 2005-08-10 | 法国原子能委员会 | Hydrocarbon copolymer or polymer based aerogel and method for the preparation thereof |
| US9068346B1 (en) * | 2010-08-20 | 2015-06-30 | The Board Of Regents Of The University Of Texas System | Acoustic attenuators based on porous nanostructured materials |
| CN109874089A (en) * | 2019-01-25 | 2019-06-11 | 歌尔股份有限公司 | Aerosil sound-absorbing material and sounding device |
| CN111163395A (en) * | 2020-01-02 | 2020-05-15 | 歌尔股份有限公司 | Sound-absorbing particle, sound-generating device, and electronic apparatus |
| WO2021135875A1 (en) * | 2020-01-02 | 2021-07-08 | 歌尔股份有限公司 | Sound-absorbing particles, sound production device and electronic equipment |
| CN213186536U (en) * | 2020-10-29 | 2021-05-11 | 歌尔股份有限公司 | Sound generating device and head-mounted electronic equipment |
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