JPS6380697A - Acoustic reproduction device - Google Patents

Abstract

PURPOSE:To maintain the hermetic property of a closed space, to prevent the reduction of a sound pressure applied to an auditor, and to allow the auditor to fell a presence feeling sufficiently by supporting a speaker unit movably to fit the body of the auditor and elastically. CONSTITUTION:An acoustic reproduction device is used, for instance, as the back of a chair, and at the time of a reproduction, cushions 4, 5 and protector 3, cantacting the back of the auditor, form the closed space, then the sound pressure of the low frequency component due to the speaker unit 1 is applied efficiently to the back of the auditor, and felt by the of the auditor. The speaker unit 1 is supported elastically and movably by coil springs 10, 10, ..., and if the protector 3 is pushed and pressed by the back of the auditor, the speaker unit 1 moves, and whatever the shape of the body of the auditor is, and however the body of the auditor moves during a listening, the hermetic property of the closed space is maintained and the reduction of the sound pressure applied to the auditor is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a sound reproduction device for compensating for the insufficiency of bass reproduction by a speaker system or headphones and providing a sense of realism.

B8 Summary of the Invention The present invention provides a sound reproduction device comprising a speaker unit to which low frequency components of a signal from a signal source are supplied, in which the speaker unit is elastically supported and moves in accordance with the listener's body. By doing so, it is possible to always obtain a sufficient sense of presence no matter what the listener's body shape is or even if the listener moves his/her body while listening.

C1 Prior Art Conventional speakers are inertial-controlled, and the low-frequency reproduction limit is defined by the low-frequency resonant frequency f0. Therefore,
If you try to lower the low-frequency reproduction limit to obtain deep bass with a sufficient output level, the speaker system will become extremely large, or
This results in a speaker system with extremely low sensitivity. Moreover, if an extremely large speaker system is used to obtain a low pitch feeling (realism) similar to that of a live performance, a noise problem will arise, making it impractical.

Furthermore, headphones are disadvantageous in reproducing bass sounds, and sound is not transmitted to any part of the human body other than the ears, so a sufficient sense of realism cannot be obtained.

In order to compensate for the insufficiency of bass reproduction by such speaker systems or headphones, the low frequency components of the reproduced signal are supplied to a speaker unit, and the sound pressure from this speaker unit is applied directly to the back of the listener, for example, so that the listener can experience it. Accordingly, a sound reproduction device has been proposed that can provide a sense of presence close to that of a live performance. In this device, a cavity is provided on the sound emitting side of the speaker unit, and a closed space is formed between it and the listener's back during playback, so that low-frequency components can be efficiently experienced at high sound pressure. ing.

D0 Problems to be Solved by the Invention By the way, due to differences in the body shape of each listener or movement of the body during listening, the airtightness of the closed space may deteriorate and the sound pressure applied to the listener may decrease. There was a risk that a sufficient sense of presence could not be obtained.

Therefore, the present invention was proposed in view of the above-mentioned conventional problems, and no matter what body shape the listener has or even if he moves his body while listening, the present invention always provides a sufficient sense of R field. The object of the present invention is to provide a sound reproduction device that can be obtained.

Means for Solving the E0 Problem In order to solve the above-mentioned problem, the sound reproduction device according to the present invention includes a speaker unit to which a low frequency component of a signal from a signal source is supplied, and this speaker unit. a closed space forming member that is provided on the sound emitting surface side and forms a closed space by closely contacting parts of the human body other than the head during playback; and an elastic member that allows the speaker unit to move inward from the closed space forming member. It is characterized by comprising an elastic support member that supports the body.

F0 Effect According to the present invention, the speaker unit moves in accordance with the listener's body, the airtightness of the closed space is always maintained, and a drop in the sound pressure applied to the listener is prevented.

G. Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side sectional view showing the configuration of essential parts of an embodiment of a sound reproduction device according to the present invention, and FIG. 2 is a rear view of the same. This will be explained with reference to these FIGS. 1 and 2. The speaker unit 1 is a bass reproduction unit to which a low frequency component of a signal from a signal source is supplied, and is provided approximately at the center of the outer casing 2 . On the sound emitting surface side of the speaker unit 1, a substantially square protector 3 having a large number of holes is attached to the frame front portion 1a of the speaker unit 1. Further, on the sound emitting surface side of the speaker unit 1, non-ventilated, ie, airtight, cushions 4.5 are provided around the speaker unit 1, above and below in FIG. 1, respectively.

The surface of the cushion 4.5 and the cushion 4.5
The area in between is covered with an exterior sheet 6.

The protector 3 and the cushion 4.5 constitute a closed space forming member that forms a closed space by coming into close contact with a part of the human body other than the head, in this example, the back, during playback. This allows you to experience the sound pressure of 100% efficiently.

The cushion 4.5 also serves to prevent sound emitted forward from the speaker unit 1 from going around to the rear side.

The baffle 7 arranged on the back side has notches in the center and in four directions around it, and near each end of the notches in the four directions, there are four metal plates 8.8°...・are installed respectively. Further, the frame back portion 1b of the speaker unit 1 has four locking portions 9a, 9 that protrude outward.
An annular sheet metal 9 having a, . . . is attached. Then, the above-mentioned locking parts 9a, 9a,... and the above-mentioned sheet metal 8
．． 8. A total of 8 coil springs 10°, 10, . That is, the above-mentioned Subikani knit 1 has a coil spring 1 which is an elastic support member.
0,10. ... is elastically supported so as to be movable inward by the protector 3 and cushion 4.5 that constitute the closed space forming member. Although not shown, the space on the back side is filled with, for example, urethane foam.

The sound reproduction device configured in this manner is used, for example, as a backrest portion of a chair, and a speaker system is installed in front of the chair. A low frequency component of the reproduction signal supplied to the speaker system is supplied to the speaker unit 1 of the sound reproduction apparatus. During playback, the cushions 4 and 5 and the protector 3 come into close contact with the listener's back to form a closed space, and the sound pressure of the low-frequency component from the speaker unit 1 is efficiently applied to the listener's back and is experienced. Ru. By experiencing the sound pressure of this low-frequency component, the listener can enjoy the music with a sense of presence close to that of a live performance, for example, as if they were at a concert venue. Here, the speaker unit 1 has a coil spring 10
,10. Because the protector 3 is movably and elastically supported by the listener's back, the speaker unit 1 becomes hyperactive. Therefore, no matter what the listener's body shape is, or even if he moves his body while listening, the sound emitting surface of the speaker unit 1 and the listener's back always substantially face each other, and the airtightness of the closed space is maintained. , since a drop in the sound pressure applied to the listener is prevented.
Listeners can always get a full sense of presence.

H6 Effects of the Invention As is clear from the description of the embodiments described above, in the sound reproducing device of the present invention, the speaker unit is elastically supported so as to be movable inward from the closed space forming member, and the speaker unit is supported on the listener's body. I'm trying to move them together. Therefore, no matter what the listener's body shape is, or even if he or she moves while listening, the airtightness of the closed space is maintained, and a drop in the sound pressure applied to the listener is prevented. You can always get a full sense of realism.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing the configuration of essential parts of an embodiment of a sound reproducing device according to the present invention, and FIG. 2 is a rear view of the same. 1...Speaker unit 3...
... Protector 4.5 ... Cushion 10 ... Coil wings

Claims (1)

[Claims] A speaker unit to which a low frequency component of a signal from a signal source is supplied, and a speaker unit provided on the sound emitting surface side of the speaker unit so as to be in close contact with a part of the human body other than the head during reproduction. A sound reproduction device comprising: a closed space forming member that forms a closed space; and an elastic support member that elastically supports the speaker unit so as to be movable inward from the closed space forming member.