JP2006023370A - Noise insulation method and noise insulation equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise insulation method and noise insulation equipment which can remarkably increase the sound insulation effect when insulating sound transmitted from a noise generating surface-like body F to a noise reduction object area P located in the opposite side of a sound insulation board 1 through the sound insulation board 1 adjoining this surface-like body via space S. <P>SOLUTION: Offset sound for offsetting the sound transmitted to the noise reduction object area P from the noise generating surface-like body F is generated by oscillating the noise insulation board 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a method for isolating sound transmitted from a noise generating planar body through a sound insulating plate adjacent to the planar body through a space to a noise reduction target region located on the opposite side of the sound insulating plate. In particular, the present invention relates to a sound insulation device, and particularly to a device that greatly improves the sound insulation effect.

  Conventionally, as a method of isolating sound transmitted from a noise generating planar body to a noise reduction target area in a space adjacent to the planar body, a space between the planar body and the noise reduction target area space is used. For example, as shown in a cross-sectional view in FIG. 1 (a), from the floor (noise generating plane) F of the house to the downstairs room (noise) An example of providing a space S between the upper floor F and the lower ceiling (sound insulating plate) C to isolate the sound transmitted to the reduction target area P and making the ceiling C highly sound-insulating. However, this structure alone cannot sufficiently provide sound insulation, and various alternative methods have been proposed.

Among these proposals, the method shown in the cross-sectional view of FIG. 1 (b) is that the lower ceiling or the upper floor is made into a double structure, and the upper floor (noise generating planar body) F and the ceiling (second sound insulation). A sound insulation board M is provided between the board C and the sound to be transmitted to the living room portion P (see, for example, Patent Document 1), as shown in FIG. Sound insulation is improved, but it is not yet satisfactory.
JP-A-56-20256

  The present invention has been made in view of such problems, and is located on the opposite side of the sound insulating plate from the noise generating surface member through the sound insulating plate adjacent to the surface member through the space. It is an object of the present invention to provide a sound insulation method and a sound insulation device capable of greatly improving the sound insulation effect when sound transmitted to a noise reduction target area is sounded.

(1) In the present invention, sound transmitted from a noise generating planar body to a noise reduction target region located on the opposite side of the sound insulating board through a sound insulating board adjacent to the planar body via a space is transmitted. In the method of sound insulation,
This is a sound insulation method for generating a canceling sound that cancels the sound transmitted from the noise generating planar body to the noise reduction target region by exciting the sound insulating plate.

  (2) The present invention is a sound insulation device used in the sound insulation method of (1), wherein the sound insulation device comprises the sound insulation plate and a vibration means for exciting the sound insulation plate so as to generate the canceling sound. is there.

  (3) The present invention provides in (2) a generation partial vibration detection means for detecting vibration in the noise generating planar body or detecting sound generated by this vibration, and from the generation partial vibration detection means. On the basis of the information, the sound canceling device comprises a sound insulating control means for controlling the vibration exciting means so as to cancel the sound transmitted from the noise generating planar body.

  (4) In the present invention, in (3), a target partial sound vibration detection unit that detects noise in the noise reduction target region or vibration of a vibration member disposed in the region is provided, and the sound insulation control unit is In addition to the information from the generated partial vibration detection means, the sound insulation device is configured to vibrate the sound insulation plate based on information from the target partial sound vibration detection means.

  (5) The present invention provides the sound insulation board according to any one of (2) to (4), wherein the sound insulation board is a first sound insulation board, and a space is interposed between the first sound insulation board and the noise reduction target area. It is a sound insulation apparatus which arrange | positions the 2nd sound insulation board adjacent to a board.

  (6) The present invention is the sound insulation device according to any one of (2) to (5), wherein the vibration means is configured by a vibration element using piezoelectric ceramics.

  (7) In the present invention, in any one of (4) to (6), the target partial sound vibration detection means is configured by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup. It is a sound insulation device.

  (8) According to the present invention, in any one of (1) to (7), the generated partial vibration detection means is constituted by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup. Device.

  (9) In any one of (1) to (8), the present invention is provided on a floor portion of a house floor, the noise generating planar body is a floor on the floor, and the noise reduction target region is partitioned This is a sound insulation device that blocks sound transmitted from the upper floor to the lower floor using the sound insulation board as the ceiling on the lower floor.

  According to the invention of (1), since the sound insulating plate is vibrated to generate a canceling sound that cancels the sound transmitted from the noise generating planar body to the noise reduction target region, the canceling sound is converted into the noise generating surface. By controlling to interfere with the sound transmitted to the noise reduction target area from the shape, the sound pressure level in the noise reduction target area can be reduced and the sound insulation effect can be enhanced.

  According to the invention of (2), since the sound insulating plate and the vibration means for vibrating the sound insulating plate so as to generate the canceling sound are provided, the sound pressure level in the noise reduction target region is set as described above. The sound insulation effect can be increased.

  According to the invention of (3), the canceling sound is detected based on the generated partial vibration detecting means for detecting the vibration of the noise generating planar body or detecting the sound generated by the vibration and the information from now on. Since the sound insulation control means for controlling the excitation means to cancel the sound transmitted from the noise generating planar body is provided, the canceling sound is fed in accordance with the vibration level and phase of the vibration of the noise generating planar body. Word control can be performed, and the sound insulation effect can be further enhanced.

  According to the invention of (4), since the target partial sound vibration detection means is provided, it is possible to suppress even feed-forward control based on the generated partial vibration detection means using the target partial sound vibration detection means. The remaining noise or vibration can be detected as a control error, and the sound insulation control means has a function of reducing the feedback control error, so that the sound insulation effect can be further enhanced.

  According to the invention of (5), the sound insulation plate is the first sound insulation plate, and the second sound insulation plate adjacent to the first sound insulation plate with a space is disposed between the first sound insulation plate and the noise reduction target area. Therefore, the original sound that has become smaller due to the interference with the canceling sound is further sound-insulated by the second sound insulation plate, which can further reduce the sound in the noise reduction target area.

  According to the invention of (6), since the vibration means is composed of a vibrator using piezoelectric ceramics, first, if the shape is changed, the vibration frequency can be easily changed, and thus different vibrations are applied. By using a plurality of vibration frequencies, a wide excitation frequency band can be obtained. Second, in addition to the weight of the piezoelectric ceramic itself, a mechanical drive part is not required. This makes it possible to reduce the weight of the control plate that supports the exciter and to effectively excite the sound insulating plate to obtain a high sound insulating effect. The used exciter has a high conversion efficiency and conversion speed from electric energy to vibration energy, so that the exciter can be extremely energy efficient. It can be supported with high durability by Ikoto.

  According to the invention of (7), since the target partial sound vibration detection means is constituted by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup, the target partial sound vibration detection means is made durable. Can be expensive.

According to the invention of (8), the generated partial vibration detection means is constituted by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup.
The generated partial vibration detecting means can be made highly durable.

  According to invention of (9), it is provided in the floor part on the floor of a house, the said noise generating planar body is made into the floor on the floor, and the sound insulation board which divides said noise reduction object area is made into the ceiling on the floor, floor Since the sound transmitted from the upper floor to the lower floor is cut off, it is possible to greatly reduce the sound transmitted from the upper floor to the downstairs living room, which is now a major problem in a house.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a conceptual diagram illustrating the configuration of the sound insulation device according to the first embodiment. The sound insulation device 10 is configured to have a planar structure F through a space S from a noise generation planar structure F serving as a noise generation source. The sound that passes through the sound insulation plate 1 adjacent to the sound insulation plate 1 and is transmitted to the noise reduction target region P located on the opposite side of the sound insulation plate 1 is sound-insulated. Means 2, a generated partial vibration detecting means 3 for detecting vibration in the noise generating planar body F, and a sound insulation control means 5 for controlling the excitation means 2 based on information from the generated partial vibration detecting means 3 are provided. Composed.

FIG. 3 is a block diagram showing a signal transmission system in the sound insulation device 10 of this embodiment. The vibration V ₁ accompanying the noise Ns ₀ generated in the noise generating planar body F is detected by the generated partial vibration detecting means 3. The vibration data v ₁ is input to the sound insulation control means 5. In the sound insulation control means 5, for example, the amplitude and phase at a predetermined frequency component of the vibration data v ₁ are substituted into a predetermined function Fn to generate a vibration signal Fn (v ₁ ), which is generated by the vibration means 2. Output to. The vibration means 2 vibrates the sound insulating plate 1 directly or indirectly using the signal Fn (v ₁ ), and the sound insulating plate 1 responds to the vibration data v ₁ at a predetermined frequency. The canceling sound Nc having a changing amplitude and phase is output.

On the other hand, the noise Ns ₀ generated in the noise generating planar body F is transmitted to the noise reduction target area P as noise Ns through the transmission path of the sound insulating plate 1 and the like, where it is superimposed on the canceling sound Nc, Noise (Ns + Nc). This noise (Ns + Nc) is a noise to be reduced. Therefore, the function Fn is set in advance based on experiments or the like so that (Ns + Nc) is minimized. If Nc has the same amplitude as Ns and the phase is shifted by 180 degrees, the noise (Ns + Nc) is ideally zero. However, in reality, there are various constraints, and Nc is not. , Ns is preferably formed so as to cancel as much as possible. Therefore, the function Fn is set so that the noise (Ns + Nc) is minimized under the input condition of the generated noise Ns ₀ within a predetermined range.

Further, the excitation means 2 is preferably composed of one or a plurality of different excitation frequencies according to the frequency band of the noise to be reduced and the size of the sound insulation plate 1. The predetermined frequency of the vibration data v ₁ used for the vibration signal Fn (v ₁ ) should correspond to the vibration frequency. When the vibration means 2 is composed of a plurality of vibration signals, For each of the excitation means, the same frequency component as the frequency of the excitation means is extracted from the vibration data v ₁ , the amplitude and phase for the frequency component are substituted into the function Fn, and the excitation signal for the excitation means is obtained. It is good to do.

  Thus, the sound insulation control means 5 in the first embodiment is configured to feed-forward control the vibration means 2 based on the information from the generated partial vibration detection means 3.

  FIG. 4 is a conceptual diagram showing the configuration of the sound insulation device according to the second embodiment. The sound insulation device 10A is similar to the sound insulation device 10 in that the space S and the sound insulation plate 1 are separated from the noise generating planar body F. The sound that passes through and is transmitted to the noise reduction target region P located on the opposite side of the sound insulating plate 1 is sound-insulated, the sound insulating plate 1, the vibration means 2 that vibrates the sound insulating plate 1, and the noise generating surface shape In addition to the generated partial vibration detection means 3 for detecting vibrations in the body F and the sound insulation control means 5A for controlling the vibration means 2, the noise in the noise reduction target area P, the noise in the noise reduction target area, or the area thereof The target partial sound vibration detection means 4 for detecting the vibration of the arranged vibration member is provided.

  Here, the target partial sound vibration detection means 4 may be attached to the sound insulation plate 1 or may be provided separately. In any case, the noise generation surface shape of the noise reduction target region P, that is, the sound insulation plate 1 is provided. It is installed in the area opposite to the body F.

FIG. 5A is a block diagram showing a signal transmission system in the sound insulating device 10A of the second embodiment, and the vibration V ₁ accompanying the noise Ns ₀ generated in the noise generating planar body F is generated partial vibration. is detected by the detection means 3 are input to the sound insulation control means 5A, sound insulation in the control unit 5A, for example, the amplitude and phase of a predetermined frequency component of the vibration data v _1, excitation is substituted into a predetermined function Fn A signal Fn ₁ (v ₁ , Δn) is generated and output to the vibration means 2. The vibration means 2 vibrates the sound insulation plate 1 using the signal Fn ₁ (v ₁ , Δn) directly or indirectly, and the vibration insulation plate 1 vibrates the vibration data v at a predetermined frequency by this vibration. A canceling sound Nc having an amplitude and a phase that change according to ₁ is output.

On the other hand, the noise Ns ₀ generated in the noise generating planar body F is transmitted to the noise reduction target area P as the noise Ns through the transmission path of the sound insulating plate 1 and the like, where it is superimposed on the canceling sound Nc, Noise (Ns + Nc). This noise (Ns + Nc) is a noise to be reduced. In this embodiment, the noise remaining after the feedforward control is regarded as a control error ΔN = (Ns + Nc), and this noise is detected as the target partial sound vibration detection means 4. , And the detected noise data Δn is fed back to the sound insulation control means 5. The function Fn ₁ for generating the vibration signal Fn ₁ (v ₁ , Δn) sent from the sound insulation control means 5 to the vibration device changes depending on both the feedforward amount v ₁ and the feedback amount Δn. The control error ΔN remaining in the feedforward control is set in advance to be as small as possible.

The control method of the sound insulation control means 5 is an example, and how the control error ΔN is fed back to the excitation signal is not limited to the above, and for example, the control error ΔN becomes small. It may also include such logic, etc. to vary the Fn ₁ by learning control so.

The signal transmission system of this embodiment is different from that of the first embodiment only in that feedback of ΔN is added to the excitation signal, and detailed description of other points is omitted. However, when the characteristics of the noise Ns ₀ generated by the noise generating planar member F can be limited to some extent, the first embodiment can simplify the configuration of the device. In the embodiment, it is easy to obtain a high sound insulation effect.

FIG. 6 is a conceptual diagram illustrating the configuration of the sound insulation device according to the third embodiment. The sound insulation device 10B is transmitted from the noise generating planar body F to the noise reduction target region P partitioned by the sound insulation plate 7. Sound insulation is performed, and the first sound insulation plate 6 and the first sound insulation plate 6 disposed between the noise generation planar body F and the space S ₁ are interposed between the first sound insulation plate 6 and the noise reduction target region P. The second sound insulating plate 7 disposed across the space S ₂ from the sound insulating plate 6, the excitation means 2 for exciting the first sound insulating plate 6, and the generated partial vibration for detecting vibration in the noise generating planar body F On the basis of information from the detection means 3 and the generated partial vibration detection means 3, the sound insulation control means 5 for controlling the vibration means 2 is provided.

  Thus, the sound insulation device 10B of this embodiment is different from the sound insulation device 10 of the first embodiment only in that the second sound insulation plate 7 is added, and the signal transmission system is also the first. Although it is completely the same as that of the first embodiment and detailed description is omitted, a higher sound insulation effect than that of the first embodiment can be obtained by the provision of the sound insulation plate 7.

Figure 7 is a conceptual diagram showing a configuration for the sound insulating device of the fourth embodiment, sound insulating device 10C includes a first sound insulating plate 6 arranged across a space S ₁ from a noise generating planar body F, between the first sound insulating plate 6 and the noise reduction target area P, the second sound insulating plates 7 arranged across the space S ₂ from the first sound insulating plate 6 to vibrate the first sound insulating plate 6 Excitation means 2, generated partial vibration detection means 3 for detecting vibration in the noise generating planar body F, target partial sound detection for detecting noise in the noise reduction target area P or vibration of a vibration member arranged in that area Based on the information of both the means 4 and the generated partial vibration detection means 3 and the target partial sound vibration detection means 4, the sound insulation control means 5A for controlling the vibration excitation means 2 is provided.

  Thus, the sound insulation device 10C of this embodiment is different from the sound insulation device 10A of the second embodiment only in that the second sound insulation plate 7 is added, and the signal transmission system is also the first. Although the configuration is exactly the same as that of the second embodiment and detailed description thereof is omitted, the sound insulation effect higher than that of the second embodiment can be obtained by providing the sound insulation plate 7.

  FIG. 8 is a conceptual diagram showing the configuration of the sound insulation device of the fifth embodiment. The sound insulation device 10D includes a sound insulation plate 1, a vibration means 2 for exciting the sound insulation plate 1, a target partial sound vibration detection means 4, and And a sound insulation control means 5A for controlling the excitation means 2 based on information from the target partial sound vibration detection means 4, and the target partial sound vibration detection means 4 includes noise in the noise reduction target region P, or The vibration of the vibration member installed in this region is detected. That is, the sound insulation device 10D of this embodiment is configured by omitting the generated partial vibration detection means 3 for detecting vibration in the noise generating planar body F from the sound insulation device 10A of the second embodiment. High sound insulation effect can be obtained.

FIG. 9 is a block diagram showing a signal transmission system in the sound insulation device 10D according to the fifth embodiment. The noise Ns ₀ generated in the noise generating planar body F is transmitted through the transmission path of the sound insulation plate 1 and the like to the noise Ns. Is transmitted to the noise reduction target region P. At this time, the noise (Ns + Nc) is superimposed on the canceling sound Nc generated by the vibration means 2. Here, the noise can be completely eliminated by controlling the canceling sound Ns to be −Nc. However, this is an ideal state, and the sound insulation control means 5B receives the noise from the target partial sound vibration detection means 4. Based on the feedback amount Δn, the canceling sound Ns is generated so as to approach the ideal state.

Figure 10 is a conceptual diagram showing a configuration of a sound insulation device in the sixth embodiment, the sound insulation device 10E includes a first sound insulating plate 6 arranged across a space S ₁ from a noise generating planar body F, the first of between sound insulating plate 6 and the noise reduction target area P, vibrated to vibration second sound insulating plates 7 arranged from the first sound insulating plate 6 with a space interposed therebetween S _2, the first sound insulating plate 6 pressurized Means 2, means 8 for detecting noise in the space S ₂ , and sound insulation control means 5 B for controlling the vibration means 2 based on information from the means 8.

Sound insulation device 10D of this embodiment, with respect to sound insulation device 10A of the fifth embodiment, by adding the second sound insulating plates 7, instead of the detection means 4 damping subject partials, a means 8 to the space S ₂ However, since the signal transmission system is configured in exactly the same way as that of the fifth embodiment, the detailed description thereof is omitted. A higher sound insulation effect than in the second embodiment can be obtained.

  As mentioned above, although the structure was demonstrated about 1st-6th embodiment, as the vibration means 2 used for these embodiment, it is preferable to comprise with the vibrator using piezoelectric ceramic, FIG. (A) is a top view which shows the attachment aspect of a piezoelectric ceramic vibrator, FIG.11 (b) is sectional drawing corresponding to the bb arrow of Fig.11 (a). The piezoelectric ceramic exciter 11 is formed in a ring shape, and the exciter 11 is mounted concentrically on the disc 12, the disc 12 is supported by the support column 13, and the end of the support column 13 that supports the disc 12. The opposite end 14 is fixed to the sound insulating plate 1. Here, the disk 12 also acts as an additional mass for amplifying the vibration, and the sound insulating plate 1 can be vibrated by applying an alternating voltage having a predetermined frequency to the vibration element 11, and the amplitude thereof. By changing the phase, the canceling sound Nc generated from the sound insulating plate 1 can be controlled.

  Further, when the target partial sound vibration detection means 4 provided in the second, fourth, fifth, or sixth embodiment is to directly measure noise in the noise reduction target area P, this is replaced with a capacitor. Type, dynamic type and other general-purpose microphones, and in the case where high durability is required, it can be constituted by a piezoelectric ceramic microphone, and the signal transmission system described above with reference to FIGS. 5 (a) and 9 This example corresponds to the case where noise is directly detected by these microphones.

On the other hand, when the target partial sound vibration detection means 4 is to detect the vibration of the vibration member arranged in the noise reduction target region P, it can be configured using a vibration meter, for example, an acceleration pickup. FIG. 5B is a block diagram showing an example of a signal transmission system that feeds back a control error ΔN = (Ns + Nc) using a vibrometer. In this case, the control error ΔN vibrates the vibration member. since, as a vibration meter for detecting vibration of the vibration member and the vibration member, constructed as a detection unit 4A damping subject partials, proportional vibration data v ₂ from the vibrometer in .DELTA.N, sound insulation control means 5A Can be fed back to the sound insulation control means 5A.

  12A and 12B are diagrams showing the structure of a microphone in the case where the target partial sound vibration detection means 4 is constituted by a piezoelectric ceramic microphone. FIG. 12A is a cross-sectional view, and FIG. It is sectional drawing corresponding to the bb arrow of a). The piezoelectric ceramic microphone includes a PZT (piezo) sound receiving element 26 that detects sound pressure, a microphone case 22 that houses the PZT sound receiving element 26, a front mesh 23 that protects the PZT sound receiving element 26 and allows sound to pass through, PZT. The edge rubber 24 elastically supports the sound receiving element 26 from the microphone case 22, and the PZT sound receiving element 26 is supported between the edge rubber 24 and the PZT sound receiving element 26, and vibrations propagated to the PZT sound receiving element 26 are reduced. Vibration-absorbing element 25, an environment-resistant film 29 that covers and protects the PZT sound receiving element 26 from the environment, and a preamplifier that amplifies the voltage output from the PZT sound receiving element 26 according to the amount of sound received 27 and a microphone cord 28 for transmitting the output from the preamplifier 27 to the outside, for example, the vibration means 2.

In addition, the sound insulating plate 1 or 6 can be sufficiently vibrated by the vibrator 2, and it is desirable that the sound radiation efficiency is good, the weight is light, and an appropriate internal loss and rigidity are provided. It is preferable to use a material having a density of 30 to 90 kg / m ³ as a material constituting this, and examples of suitable materials include lightweight honeycomb structure boards such as polystyrene foam, aluminum honeycomb, and paper honeycomb, thin veneer plywood, and plaster board. be able to.

  As an example using the sound insulation devices 10, 10A, 10B, 10C, 10D, and 10E of the first to fourth embodiments described above, these devices are provided on the floor of the house, and the sound to the floor is transmitted. In this case, the noise generating planar member F is composed of the floor above the floor, the sound insulation plate 1 or 7 is composed of the ceiling on the floor, and the noise reduction target area P is composed of the room on the floor below. And the apparatus of 1st and 2nd embodiment is an example used when a ceiling is comprised only with one board, and the apparatus of 3rd and 4th embodiment makes a ceiling a double structure, or An example in which the floor on the floor has a double structure is shown.

  In order to confirm the effect of the present invention, an experiment was conducted using a sound insulation device shown in a sectional view in FIG. The outline of the apparatus used for the experiment is as follows. A space in the enclosure EC having a square hole shape is divided into two upper and lower portions by a slab VP, the slab VP is a noise generating planar body, and an acceleration pickup 17 serving as a generated partial vibration detecting means is attached to the slab VP. Further, the opening of the enclosure EC is covered with a sound insulation plate 15, the sound insulation plate 15 is fixed to the upper portion of the enclosure EC via an edge rubber RG, and the piezoelectric ceramic vibrator 16 is attached to the sound insulation plate 15. The microphone 18 is disposed in the upper area of the sound insulation plate that is the noise reduction target area, and the microphone 18 is used as the target partial sound vibration detection means.

In addition, as a material of the sound insulation board 15, a high density foamed polystyrene board (styrene board) having a density of 70 to 90 kg / m ³ was used.

  The sound insulation control means 19 is configured to transmit the vibration signal to the piezoelectric ceramic vibrator 16 based on the detection signal from the acceleration pickup 17 and the detection signal from the microphone 18. Further, in order to generate sound from the slab VP, a speaker SP is installed in the lower space of the enclosure EC partitioned by the slab VP.

  The experimental sound insulation device having the above configuration corresponds to the sound insulation device 10A of the second embodiment described above when each of the piezoelectric ceramic vibrator 16, the acceleration pickup 17, the microphone 18, and the sound insulation control means 19 is operated. When these means are not operated, they correspond to conventional ones that are composed only of a sound insulation board, and the state where this device is operated is an example, and the state where the device is not operated is a conventional example. The sound pressure level was measured and compared for each of the examples.

  FIG. 14 shows the sound pressure level detected by the microphone 18 with the frequency on the horizontal axis. As is clear from FIG. 14, the sound insulation device of the embodiment is compared with the conventional one, The sound pressure level can be lowered in a wide frequency band.

  In the present invention, when a sound is transmitted from a noise generating planar body through a sound insulating plate adjacent to the planar body via a space and is transmitted to a noise reduction target region located on the opposite side of the sound insulating plate. For example, it can be used as a sound insulation device for a house, a device for sound insulation from roads and railways, and the like.

It is sectional drawing of the house which illustrates the conventional sound-insulation method. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 1st Embodiment which concerns on this invention. It is a block diagram which shows the signal transmission system in 1st Embodiment. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 2nd Embodiment. It is a block diagram which shows the signal transmission system in 2nd Embodiment. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 3rd Embodiment. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 4th Embodiment. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 5th Embodiment. It is a block diagram which shows the signal transmission system in 5th Embodiment. It is a conceptual diagram which shows the structure of the sound insulation apparatus of 6th Embodiment. It is the top view and sectional drawing which show the attachment aspect of a piezoelectric ceramic vibrator. It is sectional drawing and the side view which illustrate the structure of a piezoelectric ceramics type | mold microphone. It is a conceptual diagram which shows the structure of the apparatus of an Example. It is a graph which shows the noise level of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sound insulation board 2 Excitation means 3, 3A Generation | occurrence | production partial vibration detection means 4, 4A Target partial sound detection means 5, 5A, 5B Sound insulation control means 6, 7 Sound insulation board 8 Noise detection means 10, 10A, 10B, 10C DESCRIPTION OF SYMBOLS 10D, 19E Sound insulation apparatus 11 Piezoelectric ceramic exciter 12 Disc 13 Support | pillar 14 End of support | pillar 15 Sound insulation board 16 Piezoelectric ceramic exciter 17 Accelerometer 18 Microphone 19 Sound insulation control means 22 Microphone case 23 Front mesh 24 Edge rubber 25 Vibration absorption element 26 PZT sound receiving element 27 Preamplifier 28 Microphone cord 29 Environmental resistant film EC Enclosure F Noise generating surface P Noise reduction target area RG Edge rubber S, S ₁ , S ₂ space SP Speaker VP Slab

Claims (9)

In a method for isolating sound transmitted from a noise generating planar body to a noise reduction target region located on the opposite side of the sound insulating board through a sound insulating board adjacent to the planar body through a space,
A sound insulation method for generating a canceling sound that cancels a sound transmitted from a noise generating planar body to a noise reduction target region by exciting the sound insulating plate.   2. A sound insulation device for use in the sound insulation method according to claim 1, comprising: the sound insulation plate; and vibration means for exciting the sound insulation plate so as to generate the canceling sound.   A generation partial vibration detection means for detecting vibration in the noise generating planar body or detecting a sound generated by the vibration is provided, and the canceling sound is generated based on information from the generation partial vibration detection means. The sound insulation device according to claim 2, further comprising sound insulation control means for controlling the excitation means so as to cancel the sound transmitted from the generated planar body.   A target partial sound vibration detection means for detecting noise in the noise reduction target area or vibration of a vibration member arranged in the area is provided, and the sound insulation control means is outside the information from the generated partial vibration detection means. The sound insulating device according to claim 3, wherein the sound insulating plate is vibrated based on information from the partial sound vibration detecting means.   The sound insulation board is a first sound insulation board, and a second sound insulation board adjacent to the first sound insulation board is disposed between the first sound insulation board and a noise reduction target region with a space interposed therebetween. The sound insulation apparatus in any one.   The sound insulation device according to any one of claims 2 to 5, wherein the vibration means is composed of a vibration element using piezoelectric ceramics.   The sound insulation device according to any one of claims 4 to 6, wherein the target partial sound vibration detection means is configured by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup.   The sound insulation device according to any one of claims 4 to 7, wherein the generated partial vibration detection means is configured by a condenser microphone, a dynamic microphone, a microphone using piezoelectric ceramics, or an acceleration pickup.   Sound transmitted from the upper floor to the lower floor is provided on the floor portion of the upper floor of the house, the noise generating planar body is the upper floor, and the sound insulation board that partitions the noise reduction target area is the lower ceiling. The sound insulation device according to any one of claims 1 to 8, wherein the sound insulation device is blocked.

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