soundproofing device

Abstract

The present invention comprises: a glass sheet structure that is configured so as to include an intermediate layer between glass sheets and partitions an indoor space and an outdoor space; a vibration output unit that is fixed to the glass sheet structure and causes the glass sheet structure to vibrate in accordance with an input signal; an outdoor sound detection unit that detects sound from a noise source or a vibration source in a correlative relationship with sonic vibration induced in the glass sheet structure, and outputs a reference signal corresponding to the detection result; an indoor sound detection unit that detects sound in the indoor space and outputs an error signal corresponding to the detection result; and a control unit that has an adaptive filter that generates a cancel signal of a phase opposite that of the reference signal so as to minimize the error signal, and causes the cancel signal from the adaptive filter to be output by the vibration output unit.

Description

[Technical Field]

[0001] The present invention relates to a sound insulating device. [Background technology]

[0002] Conventionally, a vehicle interior noise reduction device is known that detects noise from noise sources such as vehicle tires and outputs a sound that is in the opposite phase to the detected sound, thereby reducing noise inside the vehicle interior (Patent Document 1). In the vehicle interior noise reduction device of Patent Document 1, a first microphone located in the vehicle cabin detects the frequency of the noise and outputs a reference signal. In response to this reference signal, a sound with the same amplitude and opposite phase as the detected noise is emitted into the vehicle cabin from a speaker located in the headrest as an anti-phase sound (secondary sound). Meanwhile, a second microphone located near the speaker detects residual noise in the vehicle cabin and inputs the detected error signal to control means. Based on the reference signal and the error signal, the control means updates the coefficients of an adaptive filter using an adaptive algorithm to minimize the error signal, thereby controlling the anti-phase sound output from the speaker.

[0003] According to this vehicle interior noise reduction device, the noise heard by passengers in the vehicle interior is reduced by outputting an inverse phase sound of the noise from a speaker built into the headrest. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-288489 Summary of the Invention [Problem to be solved by the invention]

[0005] However, devices that use a conventional speaker that drives a vibrating body such as a paper cone to output an anti-phase sound to noise can effectively reduce noise in the relatively low frequency range of the audible range, but are not good at reducing noise in the mid- to high-frequency range. For example, noise with a relatively high frequency above 150 Hz tends to enter a room through a window, and it is desirable to reduce this noise as well.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a soundproofing device and a soundproofing method that can effectively silence a room by blocking noise in a wide frequency range, including high frequency ranges. [Means for solving the problem]

[0007] The present invention comprises the following configurations. (1) A glass plate structure that includes a plurality of laminated glass plates and includes an intermediate layer between at least one pair of the glass plates, and that separates an indoor space from an outdoor space; a vibration output unit fixed to the glass plate structure and vibrating the glass plate structure in response to an input signal; an outdoor sound detection unit that detects a sound from a noise source or a vibration source that is correlated with the sound wave vibration induced in the glass plate structure and outputs a reference signal according to the detection result; an indoor sound detection unit that detects sounds in the indoor space and outputs an error signal according to the detection result; a control unit that has an adaptive filter that generates a cancellation signal that is in opposite phase to the reference signal so that the error signal is minimized, and that outputs the cancellation signal from the adaptive filter to the vibration output unit; A sound-proofing device comprising: (2) A sound-insulating method for vibrating a glass plate structure that separates an indoor space from an outdoor space, the glass plate structure including a plurality of laminated glass plates and an intermediate layer between at least one pair of the glass plates, in response to an input signal, a step of detecting a sound from a noise source or a vibration source that is correlated with the acoustic vibration induced in the glass plate structure, and outputting a reference signal according to the detection result; detecting a sound in the indoor space and outputting an error signal according to the detection result; generating an adaptive filter for generating a cancellation signal having an opposite phase to the reference signal so that the error signal is minimized, and vibrating the glass plate structure in response to the cancellation signal from the adaptive filter; A sound insulation method having the following features. [Effects of the Invention]

[0008] According to the present invention, noise in a wide frequency band including high frequency bands can be blocked, thereby making the interior of a room quieter. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic configuration diagram of a vehicle to which a sound insulation device is applied. [Figure 2] 1 is a schematic diagram of a vehicle door to which a sound insulation device is applied; [Figure 3] FIG. 2 is a front view of the sound insulation device, illustrating the configuration of the sound insulation device. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV shown in FIG. [Figure 5] FIG. 10 is a partial cross-sectional view showing a state in which a vibration output unit is attached to a glass plate structure. [Figure 6] 1 is a functional block diagram of a sound insulation device applied to a vehicle. [Figure 7] 1A and 1B are diagrams illustrating the difference between a general noise reduction device and a sound insulation device using a glass plate structure, in which (A) is a schematic diagram of a noise reduction device and (B) is a schematic diagram of a sound insulation device. [Figure 8] 10 is a schematic diagram of a vehicle door equipped with a sound insulation device having another configuration. FIG. [Figure 9] 1A and 1B are diagrams showing a sound-insulating device in which sound-absorbing material is provided inside an enclosing member, where (A) is a schematic cross-sectional view of a sound-insulating device in which sound-absorbing material is attached to a glass plate structure, (B) is a schematic cross-sectional view of a sound-insulating device in which sound-absorbing material is attached to the wall surface of the enclosing member, and (C) is a schematic cross-sectional view of a sound-insulating device in which sound-absorbing material is attached to the glass plate structure and the wall surface of the enclosing member. [Figure 10]10 is a graph showing the frequency distribution of sound pressure levels within an enclosure member in various sound insulation devices. [Figure 11] FIG. 10 is a partial cross-sectional view showing a state in which a vibration output unit is attached to a glass plate structure in which a vibration region is made of a single glass plate. [Figure 12] 10 is a plan view of a vehicle illustrating another application location of the sound insulation device in the vehicle. FIG. [Figure 13] FIG. 1 is a front view of a window of a house to which a sound-proofing device is applied. [Figure 14] FIG. 2 is a cross-sectional view showing a specific example of a glass plate structure. [Figure 15] FIG. 10 is a cross-sectional view showing another example of the glass plate structure. [Figure 16] 5(A) and 5(B) are cross-sectional views showing other examples of the glass plate structure. [Figure 17] FIG. 1 is a cross-sectional view showing a glass plate structure having a sealing material provided on its edge portion. [Figure 18] FIG. 1 is a cross-sectional view showing a glass plate construction in which a sealant is provided on at least a part of the surfaces of opposing glass plates of the glass plate construction. [Figure 19] FIG. 1A is a plan view showing another embodiment of a glass plate structure, and FIG. 1B is a cross-sectional view taken along line XIX-XIX in FIG. [Figure 20] FIG. 1A is a plan view showing another embodiment of the glass plate structure, and FIG. 1B is a cross-sectional view taken along the line XX-XX in FIG. [Figure 21] (A) is a plan view showing another form of a glass plate structure, (B) is a cross-sectional view taken along line XXI-XXI in (A), and (C) is an enlarged view of part C in (B). [Figure 22] FIG. 2(A) is a plan view showing another embodiment of the glass plate structure, and FIG. 2(B) is a cross-sectional view taken along line XXII-XXII in FIG. 2(A). [Figure 23] FIG. 2 is a cross-sectional view showing a curved glass plate structure. [Figure 24]1A and 1B are diagrams showing a glass plate structure having a step portion at an edge portion, in which (A) is a cross-sectional view in a concavely curved state, and (B) is a cross-sectional view in a convexly curved state. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention reduces both low-frequency noise and mid- to high-frequency noise by vibrating a glass plate structure, thereby realizing effective sound insulation control over a wide frequency range. In the following embodiments, the glass plate structure will be described as being used for vehicle windows and residential windows, but the application of the glass plate structure is not limited to these.

[0011] Fig. 1 is a schematic diagram of a vehicle S to which a sound insulation device is applied, and Fig. 2 is a schematic diagram of a door D of the vehicle S to which a sound insulation device is applied. As shown in FIG. 1, the sound insulation device is incorporated in a vehicle S, and insulates sound from a transmission path that transmits from the outside of the vehicle S to the inside of the vehicle S.

[0012] 1 and 2, the sound insulation device includes a glass plate structure 11, a vibration output unit 13, an exterior sound detection unit 1, an interior sound detection unit 3, and a control unit 5. The vibration output unit 13, the exterior sound detection unit 1, and the interior sound detection unit 3 are each connected to the control unit 5. In addition, the vehicle S is provided with acoustic speakers 7 constituting an audio system inside the vehicle, and these acoustic speakers 7 are also connected to the control unit 5.

[0013] The glass plate structure 11 is provided in a door D of a vehicle S and is used as a front side window FSW that separates the interior space of the vehicle S from the exterior space.

[0014] The vibration output unit 13 is, for example, a voice coil motor, and is attached to the glass plate construct 11. The vibration output unit 13 vibrates in response to a drive signal input from the control unit 5, and imparts the vibration to the glass plate construct 11.

[0015] The exterior sound detection unit 1 is, for example, a microphone. This exterior sound detection unit 1 detects sound from a noise source or vibration source that is correlated with the sound wave vibrations induced in the glass plate structure 11, and outputs a reference signal according to the detection result. Specifically, this exterior sound detection unit 1 is provided in the engine compartment of the vehicle S and detects sound emitted from the engine ENG. Another exterior sound detection unit 1 is also provided in the wheel well of the vehicle S and detects sounds such as road noise from the tires TR emitted while the vehicle is traveling. These sound signals detected by the exterior sound detection unit 1 are each transmitted to the control unit 5 as reference signals. Note that the exterior sound detection unit 1 may also be a vibration sensor or optical sensor that detects the rotation speed of the engine ENG. In this case, information on the rotation speed of the engine ENG is transmitted from the exterior sound detection unit 1 to the control unit 5 as a reference signal.

[0016] The interior sound detection unit 3 is, for example, a microphone, and is provided in the interior of the vehicle S to detect interior sounds. This interior sound detection unit 3 is preferably disposed in the vicinity of the glass plate structure 11 and the ears of the occupants in the interior, or is worn on the ears of the occupants. If worn on the ears of the occupants, it is more preferably a wireless microphone. The sound signal detected by this interior sound detection unit 3 is transmitted to the control unit 5 as an error signal.

[0017] Furthermore, the door D of the vehicle S equipped with the glass plate construct 11 has an enclosing member 15 that supports the glass plate construct 11. The area of ​​the glass plate construct 11 to which the vibration output unit 13 is fixed is housed inside the enclosing member 15. The enclosing member 15 has an opening 21, and supports the glass plate construct 11 with the area of ​​the glass plate construct 11 to which the vibration output unit 13 is not fixed exposed to the outside from the opening 21. The enclosing member 15 has a shielding member 17 at the opening 21, and the shielding member 17 acoustically shields the opening 21 from the glass plate construct 11.

[0018] Here, the basic configuration of the sound insulation device will be described. Fig. 3 is a front view of a sound insulation device, illustrating the configuration of the sound insulation device. Fig. 4 is a cross-sectional view taken along line IV-IV shown in Fig. 3. Fig. 5 is a partial cross-sectional view showing a state in which a vibration output unit 13 is attached to a glass plate structure 11.

[0019] 3 and 4, the glass plate construct 11 is supported by an enclosing member 15. The glass plate construct 11 is excited by vibrations generated by the vibration output unit 13 to generate sound. When viewed from the direction of arrow Va in FIG. 4, the glass plate construct 11 may have a translucent property that allows the inner side of the glass plate construct 11 to be seen through, or may have a light-blocking property or selective light transparency such as an optical filter such as a band-pass filter, or a surface treatment layer whose surface is made into a light-diffusing surface.

[0020] The glass plate structure 11 is formed by stacking a plurality of glass plates with an intermediate layer provided between these glass plates. As shown in Fig. 5 , the glass plate structure 11 of this example is formed by stacking a pair of glass plates 73, 75 with an intermediate layer 71 between these glass plates 73, 75. The glass plate structure 11 is preferably made of a material with a high longitudinal wave sound velocity, and is formed using, for example, a material such as glass, translucent ceramics, or a single crystal such as sapphire. The glass plate structure 11 has an outer shape that matches the front side window FSW of the vehicle S, but is not limited to this and may have another outer shape such as a rectangle.

[0021] The vibration output unit 13 is fixed to the glass plate construct 11 and vibrates the glass plate construct 11 in response to an input drive signal. The vibration output unit 13 includes, for example, a coil unit, a magnetic circuit unit, and a vibrating unit connected to the coil unit or the magnetic circuit unit. When a drive signal from the control unit 5 is input to the coil unit of the vibration output unit 13, the interaction between the coil unit and the magnetic circuit unit causes vibration in the coil unit or the magnetic circuit unit. The vibration of the coil unit or the magnetic circuit unit is transmitted to the vibrating unit and then transmitted from the vibrating unit to the glass plate construct 11.

[0022] At least one, and preferably a plurality of vibration output units 13 are attached to the glass plate construct 11. For example, two vibration output units 13 may be attached to one main surface of the glass plate construct 11 at a distance from each other along one side of the outer edge of the glass plate construct 11. Note that the vibration output units 13 may be provided on each of the one and other main surfaces of the glass plate construct 11, as in the vibration output units 13 shown by dotted lines in FIG. 4 .

[0023] The enclosing member 15 of the door D of the vehicle S is formed in a box shape surrounding a portion of the glass plate construct 11 including the fixing position of the vibration output unit 13. The enclosing member 15 defines an internal space 19 including the vibration output unit 13 and a part of the glass plate construct 11. The other portion of the glass plate construct 11 is exposed to the outside of the internal space 19 from an opening 21 of the internal space 19 formed in the enclosing member 15. In other words, one end of the glass plate construct 11 is exposed to the outside of the internal space 19 from the opening 21 of the internal space 19. The one end of the glass plate construct 11 mentioned above refers to the end of the glass plate construct 11 that is farther from the end of the glass plate construct 11 that is closer to the fixing position of the vibration output unit 13 and the end of the glass plate construct 11 that is farther from the end of the glass plate construct 11.

[0024] The shielding member 17 provided at the opening 21 of the enclosing member 15 makes the internal space 19 a closed space, dividing the glass plate structure 11 into a vibration region A1 inside the internal space 19 where the vibration output section 13 is provided, and a vibration region A2 outside the internal space 19.

[0025] The shielding member 17 can be made of any polymeric material, including hydrocarbons, silicones, and fluorine-containing materials, as well as any rubber. However, when the dynamic viscoelasticity of a sheet molded to a thickness of 1 mm is measured at 25°C, a frequency of 1 Hz, and in compression mode, the storage modulus G is 1.0 × 10 2 ~1.0×10 10 In particular, a material having a storage modulus G of 1.0×10 3 ~1.0×10 8Pa is more preferable. The "shielding" by the shielding member 17 mentioned above means a state in which the shielding member 17 is in contact with the glass plate construct 11 to the extent that it allows slight movement in the order of μm without completely fixing the glass plate construct 11. This prevents sound leakage from the internal space 19.

[0026] In this configuration, a support member 23 for supporting the glass plate constituting member 11 on the enclosing member 15 is provided between a drive mechanism (not shown) for raising and lowering the glass plate constituting member 11, which is provided at the bottom of the internal space 19 of the enclosing member 15 or in the internal space 19, and a part of the vibration region A1 of the glass plate constituting member 11. The support member 23 is made of an elastic sheet having cushioning properties, such as rubber, felt, or sponge.

[0027] The glass plate structure 11 constituting the front side window FSW of the vehicle S is movable relative to the enclosing member 15 by a drive mechanism (not shown) provided in the enclosing member 15. That is, the window of the vehicle S can be opened and closed by moving the front side window FSW made of the glass plate structure 11. Therefore, when the window is closed by the glass plate structure 11, the interior and exterior are separated, and sound insulation effect is obtained within the interior. That is, sound insulation effect within the interior is selectively obtained by relative movement of the glass plate structure 11 with respect to the enclosing member 15. Note that FIGS. 3 and 4 show a configuration in which the glass plate structure 11 can move relatively in the direction Ax1 shown in FIG. 3, and all of them show a fully open state in which the window of the vehicle S is fully opened, which is the same state as FIGS. 9A, 9B, and 9C described below. Furthermore, the support member 23 has the effect of suppressing mechanical damage to the lower edge of the glass plate structure 11 when the window of the vehicle S is fully open. The soundproofing device can thus exert a soundproofing effect regardless of whether the windows of the vehicle S are fully open, fully closed, or half open, but the soundproofing effect is most pronounced when the windows of the vehicle S are fully closed.

[0028] 3, when the direction in which the glass plate construct 11 protrudes from the internal space 19 inside the enclosing member 15 to the outside of the internal space 19 is defined as a first direction Ax1 and the direction perpendicular to the first direction in the plate plane is defined as a second direction Ax2, the maximum width Lw of the glass plate construct 11 in the second direction Ax2 is preferably equal to or greater than the maximum width Lh in the first direction Ax1 (Lw≧Lh). This prevents the distance from the vibration output unit 13 arranged in the vibration region A1 of the glass plate construct 11 to the vibration region A2 of the glass plate construct 11 from becoming excessively long over the entire surface of the vibration region A2, and vibration from the vibration output unit 13 is propagated to the vibration region A2 with sufficient strength.

[0029] 4, the glass plate construct 11 is divided by the shielding member 17 into a vibration region A1 to which the vibration output unit 13 is attached and which is disposed in the internal space 19 of the enclosing member 15, and a vibration region A2 which is disposed outside the internal space 19 and contributes to acoustic radiation. Therefore, sound generated from the vibration region A1 by vibration from the vibration output unit 13 is attenuated within the internal space 19. In addition, the opening 21 of the internal space 19 is acoustically shielded from the glass plate construct 11 by the shielding member 17, preventing sound generated within the internal space 19 from the vibration region A1 from leaking outside the internal space 19.

[0030] That is, when the vibration of the vibration output unit 13 in the excitation region A1 propagates to the vibration region A2 and acoustic radiation is generated from the vibration region A2, the sound (noise) generated in the excitation region A1 can be prevented from being superimposed on the sound from the vibration region A2. That is, a single continuous glass plate structure 11 is divided into the excitation region A1 and the vibration region A2, and the excitation region A1 is defined within the internal space 19 by the enclosing member 15 and the shielding member 17. This confines the noise generated from the excitation region A1 within the internal space 19, suppresses sound leakage from the internal space 19, and prevents unnecessary noise generated from the excitation region A1 due to the vibration of the vibration output unit 13 from being transmitted to the sound receiver as airborne sound. As a result, a decrease in directivity due to sound leakage can be suppressed. Furthermore, because acoustic radiation is generated to the surroundings only from the vibration region A2 of the glass plate structure 11, the sound pressure distribution due to acoustic radiation can be made uniform.

[0031] Here, when the area of ​​the vibration region A1 of the glass plate structure 11 is Ss and the area of ​​the vibration region is Sv, the area ratio Ss / Sv is preferably 0.01 or more and 1.0 or less, more preferably 0.02 or more and 0.5 or less, and even more preferably 0.05 or more and 0.1 or less.

[0032] If the area of ​​the excitation region A1 is too large compared to the area of ​​the vibration region A2, the efficiency of generating sound pressure decreases, and if it is too small, efficient vibration driving becomes impossible. Therefore, by setting the area ratio within the above range, sound radiation from the vibration region A2 in response to the vibration of the vibration output section 13 can be performed with high efficiency.

[0033] The total area of ​​the glass plate structure 11 (the area of ​​one main surface) is 0.01 m 2 More preferably, 0.1 m 2 More than 0.3m, more preferably 0.3m 2 By making the total area of ​​the glass plate structure 11 equal to or larger than the above area, it becomes easier to obtain the effects of uniforming the sound pressure distribution and suppressing the decrease in directivity, which are achieved by dividing the glass plate structure 11 into the excitation region A1 and the vibration region A2.

[0034] FIG. 6 is a functional block diagram of a sound insulation device applied to a vehicle S. 6, the control unit 5 has a transfer function correction unit 31, an adaptive algorithm 33, an adaptive filter 35, and an amplifier 37. Although not shown, the control unit 5 is configured from a microcomputer including a processor such as a CPU, memories such as ROM and RAM, and storage.

[0035] The adaptive algorithm 33 and adaptive filter 35 generate a cancellation signal that is the opposite phase of the reference signal transmitted from the exterior sound detection unit 1. The adaptive algorithm 33 and adaptive filter 35 generate a cancellation signal so as to minimize the error signal transmitted from the interior sound detection unit 3. The cancellation signal generated by the adaptive algorithm 33 and adaptive filter 35 is amplified by an amplifier 37 and transmitted to the vibration output unit 13. The adaptive algorithm 33 estimates the error using, for example, the least squares method. The filter coefficients of the adaptive filter 35 are updated appropriately by the adaptive algorithm 33 according to the level of the error signal.

[0036] The transfer function correction unit 31 calculates the transfer function of the secondary path, which is the noise transmission path between the glass plate structure 11 to which the vibration output unit 13, which is the secondary sound source, is attached, and the indoor sound detection unit 3, and based on this transfer function, synchronizes the phase of the reference signal from the outdoor sound detection unit 1 with the phase of the error signal from the indoor sound detection unit 3.

[0037] In a vehicle S equipped with the above-described sound insulation device, when the sound insulation device is activated, the exterior sound detection unit 1 detects noise from noise sources such as the sound of the engine ENG shown in Fig. 1 and road noise from the tires TR, and transmits the detection results as reference signals to the control unit 5. Also, the interior sound detection unit 3 detects sounds inside the vehicle, and transmits the detection results as error signals to the control unit 5.

[0038] When the reference signal and error signal are transmitted to the control unit 5, the transfer function correction unit 31 of the control unit 5 calculates the transfer function of the noise transfer path between the outdoor sound detection unit 1 and the indoor sound detection unit 3. Then, based on this transfer function, the phase of the reference signal from the outdoor sound detection unit 1 is synchronized with the phase of the error signal from the indoor sound detection unit 3.

[0039] Furthermore, the adaptive algorithm 33 and adaptive filter 35 of the control unit 5 generate a cancellation signal that is in opposite phase to the reference signal synchronized with the phase of the error signal and that minimizes the error signal. This cancellation signal is sent to the amplifier 37, where it is amplified and transmitted to the vibration output unit 13.

[0040] The vibration output unit 13 generates vibrations according to the transmitted cancellation signal, thereby vibrating the glass plate construct 11 to which the vibration output unit 13 is attached. Therefore, the vibration of the glass plate construct 11 caused by outside noise is canceled out by the vibration generated by the vibration output unit 13, and the transmission of noise from outside to inside the room is suppressed.

[0041] 7A and 7B are diagrams illustrating the difference between a general noise reduction device and a sound insulation device using a glass plate structure, where (A) is a schematic diagram of a general noise reduction device, and (B) is a schematic diagram of a sound insulation device using a glass plate structure. In a typical noise reduction device shown in Figure 7(A), a control microphone 43 is provided inside a room surrounded by exterior walls 41, and a detection microphone 47 is provided outside the room, where a noise source 45 is located. Furthermore, a speaker 49 that vibrates a vibrating body such as a paper cone is placed inside the room. In this noise reduction device, in response to a reference signal from detection microphone 47 that detects outside sounds and an error signal from control microphone 43 that detects inside sounds, a cancellation sound is output from speaker 49 to minimize the error signal. This reduces sounds that have entered the room from outside.

[0042] This noise reduction device can reduce sound entering the cabin regardless of the sound transmission path into the cabin. Another advantage is that it can also use existing speakers 49 from an audio system installed in the cabin. However, a noise reduction device that outputs cancellation sound from speakers 49 to reduce noise entering the cabin has difficulty effectively reducing high-frequency noise, for example, noise above 150 Hz. Furthermore, this noise reduction device is easily affected by the acoustic environment in the cabin, making it difficult to accurately reduce noise. Moreover, even if it can deal with known noises such as engine noise installed in a vehicle, it may be difficult to effectively reduce other noises.

[0043] On the other hand, in a sound insulation device using a glass plate structure 11 shown in FIG. 7(B), a control microphone 55, which is an indoor sound detector 3, is provided in a room surrounded by an exterior wall 53 having a window 51, and a detection microphone 59, which is an outdoor sound detector 1, is provided outside the room having a noise source 57. The window 51 is covered by a glass plate structure 11, to which a vibration output unit 13 is attached. In this sound insulation device, a cancellation signal is generated to minimize the error signal in response to a reference signal from the detection microphone 59 that detects outdoor sounds and an error signal from the control microphone 55 that detects indoor sounds. This cancellation signal is then output to the vibration output unit 13, causing the glass plate structure 11 to vibrate. As a result, vibrations of the glass plate structure 11 caused by outdoor noise are canceled out by the vibrations generated by the vibration output unit 13, thereby suppressing the transmission of noise from the outside to the inside of the room.

[0044] In this way, with the sound-insulating device shown in FIG. 7(B), the transmission of noise from outside to inside the room can be suppressed by vibrating the glass plate structure 11 with the vibration output unit 13. This allows the glass plate structure 11 to effectively reduce high-frequency noise, for example, noise exceeding 150 Hz, which has been difficult to cancel out with cancellation sound from a speaker when it has entered the room. Moreover, since it is possible to suppress outside noise from entering through the window, the room can be made quieter regardless of the sound environment inside the room. In other words, it is possible to suppress the inflow of noise in a wide frequency range, including high-frequency bands, from entering through the window, thereby creating a quieter, more comfortable indoor environment.

[0045] In addition to vibrating the glass plate structure 11 by the vibration output unit 13, a cancellation sound corresponding to the cancellation signal may be output from the acoustic speaker 7. In this case, even if noise enters the room, the noise can be canceled out, making the room quieter.

[0046] Next, another example of the configuration of the sound insulation device will be described. FIG. 8 is a schematic diagram of a door D of a vehicle S equipped with a sound insulation device having another configuration. 8, this sound insulation device includes an internal space sound detection unit 8 consisting of a microphone in an internal space 19 of an enclosing member 15 that encloses the vibration region A1 of the glass plate structure 11 to which the vibration output unit 13 is attached. Also, an auxiliary speaker 9 is provided in the internal space 19. The internal space sound detection unit 8 and the auxiliary speaker 9 are each connected to the control unit 5.

[0047] The internal space sound detection unit 8 detects vibration sound from the vibration region A1 of the glass plate construct 11 generated by the vibration of the vibration output unit 13, and transmits this as an error signal to the control unit 5. In response to the error signal from the internal space sound detection unit 8, the control unit 5 generates a cancellation signal for minimizing the error signal from the internal space sound detection unit 8 using the adaptive algorithm 33 and the adaptive filter 35, and outputs the cancellation sound to the auxiliary speaker 9. Then, by outputting the cancellation sound from the auxiliary speaker 9, the vibration sound from the vibration region A1 of the glass plate construct 11 generated by the vibration of the vibration output unit 13 in the internal space 19 is canceled out.

[0048] As described above, the sound insulation device according to the other embodiment can suppress the transmission of noise from the outside to the interior of the vehicle S by vibrating the glass plate structure 11 with the vibration output unit 13, and can also cancel out secondary noise caused by the vibration of the vibration output unit 13. This further enhances the noise reduction effect in the interior of the vehicle S.

[0049] Furthermore, in order to cancel out the sound caused by the vibration of the vibration output unit 13, the auxiliary speaker 9 that outputs a cancellation sound is provided in the internal space 19, but the output form of the cancellation sound is not limited to this. For example, a configuration may be adopted in which a cancellation sound that cancels out the sound generated by the vibration of the vibration output unit 13 is output from the acoustic speaker 7, or a configuration may be adopted in which the auxiliary speaker 9 and the acoustic speaker 7 are used in combination.

[0050] Sound-absorbing materials such as felt or sponge may be attached to the inside or outside of the enclosing member 15. In this case, the sound-deadening effect within the internal space 19 is enhanced. Specifically, it is preferable to use a porous sound-absorbing material or a resonant sound-absorbing material such as a perforated board as the sound-absorbing material, but it is more preferable to use a porous sound-absorbing material in terms of the frequency range in which sound can be absorbed. In addition, the normal incidence sound absorption coefficient of the sound-absorbing material at 1 kHz is preferably 0.25 or more, more preferably 0.5 or more, and even more preferably 0.75 or more. The thickness of the sound-absorbing material is preferably 0.5 mm or more and 20 mm or less, and more preferably 1 mm or more and 10 mm or less. The surface to which the sound-absorbing material is attached is preferably 25% or more, more preferably 50% or more of the area surrounding the internal space 19 of the enclosing member 15.

[0051] Furthermore, in the sound-insulating device, sound-absorbing material may be attached to part or all of the surface of the vibration region A1 of the glass plate structure 11. In this case, the generation of standing waves is suppressed, thereby reducing the sound pressure level in the internal space 19. As the sound-absorbing material, porous sound-absorbing materials made of sponge, fiber, etc., and resonance-type sound-absorbing materials made of perforated boards, etc., can be used, but from the viewpoint of the frequency band that can be absorbed and the weight reduction of the glass plate structure 11, it is preferable to use porous sound-absorbing materials.

[0052] The sound-absorbing material can be attached to at least one surface of the glass plate construct 11, but is preferably attached to both surfaces of the glass plate construct 11. When attaching the sound-absorbing material to the surface where the vibration output section 13 is located, it is preferable to cover the entire vibration output section 13 with the sound-absorbing material.

[0053] When a sound-absorbing material is attached to the glass plate structure 11, the area of ​​the sound-absorbing material is preferably 50% or more, and more preferably 75% or more, of the area of ​​at least one surface of the vibration region A1. Furthermore, the normal incidence sound absorption coefficient of the vibration region A1 at 1 kHz is preferably 0.25 or more, more preferably 0.5 or more, and even more preferably 0.75 or more. The thickness of the sound-absorbing material is preferably 0.5 mm or more and 30 mm or less, and more preferably 5 mm or more and 20 mm or less.

[0054] Here, the sound pressure level in the internal space 19 of the enclosing member 15 was measured in the case where the sound-insulating device was not provided with sound-absorbing material and in the case where sound-absorbing material was provided at each position, and the results will be described.

[0055] For each of the sound insulation devices in the following cases (a) to (d), the sound pressure level in the internal space 19 was measured when the device was vibrated with a sine wave signal having an output voltage of 1V. (a) Sound insulation device without sound absorbing material (b) Sound-insulating device in which sound-absorbing materials 25 are attached to both sides of the glass plate structure 11 ((A) in FIG. 9) (c) A sound-proofing device in which sound-absorbing material 25 is attached to the entire wall surface of the enclosing member 15 ((B) of FIG. 9). (d) A sound-insulating device in which sound-absorbing material 25 is attached to the entire wall surface of the enclosing member 15 and sound-absorbing material 25 is attached to both sides of the glass plate structure 11 (FIG. 9(C)).

[0056] The soundproofing device used was an acrylic container with internal dimensions of 295 mm × 295 mm × 120 mm that simulated the internal space 19, in which a glass plate structure 11 with dimensions of 100 mm × 100 mm × 1.0 mm that simulated the vibration area A1 was placed, and a vibration output unit 13 with an impedance of 4 Ω was installed in the center of the glass plate structure 11.

[0057] FIG. 10 is a graph showing the frequency distribution of sound pressure levels inside the enclosure member 15 in various sound insulation devices. As shown in Figure 10, when sound-absorbing material 25 was not attached to the wall surface of the enclosing member 15 and the glass plate structure 11 (comparison example), standing waves occurred in the internal space 19, resulting in a steep peak in the sound pressure level (thin line in Figure 10).

[0058] In contrast, when sound-absorbing material 25 was attached to the entire wall surface of enclosing member 15 (Example: (B) of Figure 9), or when sound-absorbing material 25 was attached to the entire wall surface of enclosing member 15 and to both sides of glass plate structure 11 (Example: (C) of Figure 9), the frequency characteristics became flat and the average sound pressure level decreased (dotted line and thick line in Figure 10).

[0059] On the other hand, when sound-absorbing material 25 was attached to both sides of glass plate structure 11 and sound-absorbing material 25 was not attached to the wall surface of enclosing member 15 (Example: (A) in Figure 9), the average sound pressure level was equivalent to the state in which sound-absorbing material 25 was not attached. However, due to the effect of preventing the generation of standing waves, the peak of the sound pressure level could be eliminated, and the noise generated in internal space 19 could be effectively reduced (dotted line in Figure 10).

[0060] Therefore, from the viewpoint of acoustic performance, it is preferable to attach the sound-absorbing material 25 to the entire inside surface of the internal space 19 of the enclosing member 15, and it is more preferable to attach the sound-absorbing material 25 to the entire inside surface of the internal space 19 of the enclosing member 15 and to both surfaces of the vibration area A1. However, in terms of the balance between material costs, construction costs and the expected acoustic effect, it is even more preferable to attach the sound-absorbing material 25 to only at least one surface of the vibration area A1, and it is particularly preferable to attach the sound-absorbing material 25 to only both surfaces of the vibration area A1.

[0061] In the above sound-proofing device, when the glass plate structure 11 is formed using a plurality of glass plates, the vibration region to which the vibration output section 13 is attached can also be formed from a single glass plate.

[0062] FIG. 11 is a partial cross-sectional view showing a state in which a vibration output unit 13 is attached to a glass plate structure 11 whose vibration region is made of a single glass plate.

[0063] Of the pair of glass plates 73, 75 of the glass plate structure 11, the outer edge of the glass plate 75 extends outward beyond the glass plate 73. The vibration output unit 13 is attached to this outward extending portion of the glass plate 73. A sealant 87 is provided at the end of the glass plate 73 and the intermediate layer 71 to seal the intermediate layer 71.

[0064] According to this configuration, the vibration output section 13 vibrates a single glass plate 75, and therefore the glass plate structure 11 can be vibrated with improved energy efficiency compared to when multiple glass plates 73, 75 are vibrated simultaneously.

[0065] It should be noted that the window portion formed by the glass plate component 11 of the sound insulation device is not limited to the front side window FSW of the vehicle S. For example, as shown in Fig. 12 , the glass plate component 11 of the sound insulation device may be provided in the rear side window RSW, the front window FW, the rear window RW, the roof glazing RG, or the like of the vehicle S.

[0066] The sound-proofing device can also be applied to things other than the vehicle S. For example, it can also be applied to windows of aircraft, ships, etc., and windows of buildings such as houses.

[0067] An example of application of the sound-insulating device to a window WD of a house is shown in Figure 13. In this case, a glass plate structure 11 is provided in the window WD of a room in the house, and a vibration output unit 13 is attached to a portion of this glass plate structure 11 that is disposed within the window frame WF. In this way, by applying the sound-insulating device to the window WD of a house, the transmission of sound from outside to inside the room can be suppressed by vibrating the glass plate structure 11 with the vibration output unit 13.

[0068] The sound-proofing device described above can be used not only for windows of moving bodies and buildings, but also for electronic equipment components such as full-range speakers, speakers for reproducing low frequencies in the 15 Hz to 200 Hz band, speakers for reproducing high frequencies in the 10 kHz to 100 kHz band, and speakers with a diaphragm area of ​​0.2 m 2 The speaker can be used for the above-mentioned large speakers, flat speakers, cylindrical speakers, transparent speakers, cover glass for mobile devices that functions as a speaker, cover glass for TV displays, screen films, displays in which video signals and audio signals are generated from the same surface, speakers for wearable displays, electronic indicators, lighting equipment, etc. The speaker can be used for music, alarm sounds, etc. Furthermore, by adding a vibration detection element such as an acceleration sensor, it can also be used as a diaphragm for a microphone or a vibration sensor.

[0069] The sound-proofing device can be used as an interior vibrating member for vehicles and other transportation machinery, as an in-vehicle or in-flight speaker. For example, it can be used in various interior panels, such as side mirrors, sun visors, instrument panels, dashboards, ceilings, doors, and other panels that function as speakers. Furthermore, it can also function as a microphone or a diaphragm for active noise control.

[0070] The soundproofing device can also be used as an opening material for use in, for example, construction, transportation machinery, etc. In this case, the glass plate structure can also be given functions such as IR cut, UV cut, and coloring.

[0071] More specifically, the sound insulation device can be applied to interior speakers, exterior speakers, and the front windshield FW, front side windshield FSW, rear side windshield RSW, rear windshield RW, or roof glazing RG of the vehicle S described above, which have sound insulation functions. The FW, FSW, RSW, RW, or RG may also function as an acoustic reflection (reverberation) panel. Furthermore, the sound insulation device can also be used as vehicle windows, structural members, and decorative panels that have improved water repellency, snow resistance, ice resistance, and stain resistance due to acoustic vibrations. Specifically, the sound insulation device can be used as automotive window glass, mirrors, flat or curved plate-like members installed inside the vehicle, as well as lenses, sensors, and their cover glass.

[0072] As architectural components, they can be used as window glass, door glass, roof glass, interior and exterior materials, decorative materials, structural materials, exterior walls, and solar cell cover glass, all of which function as vibration plates or vibration detection devices. They can also be used as partitions and dressing tables in banks, hospitals, hotels, restaurants, offices, etc. They can also function as acoustic reflection (reverberation) plates. Furthermore, sonic vibrations can improve the water repellency, snow resistance, and stain resistance mentioned above.

[0073] The internal space 19 of the sound insulation device can be formed using the above-mentioned enclosing member or the glass plate structure itself, or, for example, an automobile body, a door panel, or a sash member in the case of a building component.

[0074] Furthermore, the vibrator serving as the vibration output unit 13 can be fixed at the back side to a back plate or frame, etc., to suppress vibration of the vibrator housing and increase the excitation force.

[0075] Furthermore, by reducing the pressure inside the internal space 19 or filling it with He gas, the propagation speed of sound waves can be reduced and sound insulation can be improved. Also, by placing a sound-insulating or sound-absorbing material in the internal space 19, it is possible to suppress sound transmission through the enclosing member 15 and resonance within the internal space 19.

[0076] <Specific structural example of glass plate structure> The glass plate structure constituting the sound insulation device described above has a loss coefficient of 1×10 at 25°C, which will be described in detail later. -3 The longitudinal wave velocity in the thickness direction is 4.0×10 3 A loss factor of at least m / s is preferable. A large loss factor means a large vibration damping capacity.

[0077] The loss factor is calculated using the half-width method. When the frequency width at the point -3 dB below the peak value of the material's resonant frequency (f) and amplitude (h), i.e., the point at maximum amplitude -3 dB, is W, the loss factor is defined as the value expressed as {W / f}. To suppress resonance, the loss factor should be increased, which means that the frequency width W becomes larger relative to the amplitude h, and the peak becomes broader.

[0078] The loss factor is a value specific to the material, and in the case of a single glass plate, for example, it varies depending on its composition, relative density, etc. The loss factor can be measured by a dynamic elastic modulus test method such as the resonance method.

[0079] The longitudinal wave velocity is the speed at which longitudinal waves propagate through the diaphragm. The longitudinal wave velocity and Young's modulus can be measured by the ultrasonic pulse method described in the Japanese Industrial Standards (JIS-R1602-1995).

[0080] Here, as a specific configuration for obtaining a high loss coefficient and a high longitudinal wave sound velocity value, the glass plate structure preferably includes two or more glass plates and includes a predetermined intermediate layer between at least one pair of the glass plates.

[0081] The glass plate here refers to inorganic glass and organic glass, such as PMMA resin, PC resin, PS resin, PET resin, and cellulose resin, which are generally well known as transparent resins. When two or more glass plates are used, one of the glass plates is made of the inorganic glass or organic glass described above, and the other glass plate can be made of various materials such as a resin plate made of a resin other than organic glass, a metal plate such as aluminum, or a ceramic plate made of ceramic. From the viewpoints of design, processability, and weight, it is preferable to use organic glass, resin materials, composite materials, fiber materials, metal materials, etc., and from the viewpoint of vibration characteristics, it is preferable to use inorganic glass, highly rigid composite materials, fiber materials, metal materials, or ceramic materials. The resin material is preferably a resin material that can be molded into a flat or curved plate shape. The composite material or fiber material is preferably a resin material compounded with a high-hardness filler, carbon fiber, Kevlar fiber, or the like. The metal material is preferably aluminum, magnesium, copper, silver, gold, iron, titanium, or SUS, and other alloy materials may also be used as needed. As the ceramic material, ceramics and single crystal materials such as Al2O3, SiC, Si3N4, AlN, mullite, zirconia, yttria, YAG, etc. are more preferable. Furthermore, as for the ceramic material, a material having translucency is particularly more preferable.

[0082] <Specific example of intermediate layer configuration> The intermediate layer between the glass sheets to be laminated together is preferably a fluid layer made of a fluid such as a liquid or liquid crystal, or a gel-like material.The intermediate layer may also be made of polyvinyl butyral (PVB), ethylene vinyl acetate copolymer (EVA), polyurethane, or the like, which are suitable for use as interlayers in laminated glass.

[0083] (fluid layer) A glass plate structure can achieve a high loss factor by providing a fluid layer containing a liquid between at least a pair of glass plates. In particular, the loss factor can be further increased by setting the viscosity and surface tension of the fluid layer within suitable ranges. This is thought to be due to the fact that, unlike when a pair of glass plates is provided via an adhesive layer, the pair of glass plates are not fixed together and each glass plate maintains its own vibration characteristics. In this specification, the term "fluid" encompasses all fluid substances, including liquids, such as liquids, semisolids, mixtures of solid powders and liquids, and solid gels (jelly-like substances) impregnated with liquids.

[0084] The fluid layer has a viscosity coefficient of 1×10 at 25°C. -4 ~1×10 3 It is preferable that the viscosity is Pa·s and the surface tension at 25°C is 15 to 80 mN / m. If the viscosity is too low, it becomes difficult to transmit vibrations, and if it is too high, the pair of glass plates located on both sides of the fluid layer will adhere to each other and exhibit vibration behavior as a single glass plate, making it difficult to attenuate resonant vibrations. Furthermore, if the surface tension is too low, the adhesion force between the glass plates will decrease, making it difficult to transmit vibrations. If the surface tension is too high, the pair of glass plates located on both sides of the fluid layer will easily adhere to each other and exhibit vibration behavior as a single glass plate, making it difficult to attenuate resonant vibrations.

[0085] The viscosity coefficient of the fluid layer at 25°C is 1×10 -3 Pa·s or more is preferable, 1×10 -2 Pa·s or more is more preferable. 2 The surface tension of the fluid layer at 25°C is more preferably 20 mN / m or more, and even more preferably 30 mN / m or more.

[0086] The viscosity coefficient of the fluid layer can be measured using a rotational viscometer, etc. The surface tension of the fluid layer can be measured using the ring method, etc.

[0087] If the vapor pressure of the fluid layer is too high, the fluid layer may evaporate and no longer function as a glass plate component. Therefore, the fluid layer should have a vapor pressure of 1×10 at 25°C and 1 atm. 4 Pa or less is preferable, and 5×10 3 Pa or less is more preferable, and 1×10 3 It is more preferable that the vapor pressure is not more than 100 Pa. When the vapor pressure is high, a seal or the like may be applied to prevent the fluid layer from evaporating, but in this case, it is necessary to ensure that the sealant does not interfere with the vibration of the glass plate structure.

[0088] The thinner the thickness of the fluid layer, the better from the viewpoints of maintaining high rigidity and transmitting vibration. Specifically, when the total thickness of the pair of glass plates is 1 mm or less, the thickness of the fluid layer is preferably 1 / 10 or less of the total thickness of the pair of glass plates, more preferably 1 / 20 or less, even more preferably 1 / 30 or less, even more preferably 1 / 50 or less, particularly preferably 1 / 70 or less, and particularly preferably 1 / 100 or less. Furthermore, when the total thickness of the pair of glass plates exceeds 1 mm, the thickness of the fluid layer is preferably 100 μm or less, more preferably 50 μm or less, even more preferably 30 μm or less, even more preferably 20 μm or less, particularly preferably 15 μm or less, and particularly preferably 10 μm or less. The lower limit of the thickness of the fluid layer is preferably 0.01 μm or more from the viewpoints of film formability and durability.

[0089] The fluid layer is preferably chemically stable and does not react with the pair of glass plates located on either side of the fluid layer. Chemical stability means, for example, that the fluid layer is less susceptible to deterioration (deterioration) due to light irradiation, or that the fluid layer does not solidify, vaporize, decompose, discolor, or react chemically with glass at least in the temperature range of -20 to 70°C.

[0090] Specific examples of components of the fluid layer include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specific examples include propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil), modified silicone oil, acrylic acid-based polymers, liquid polybutadiene, glycerin paste, fluorine-based solvents, fluorine-based resins, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof. Among these, it is preferable to include at least one selected from the group consisting of propylene glycol, dimethyl silicone oil, methylphenyl silicone oil, methylhydrogen silicone oil, and modified silicone oil, and it is more preferable to use propylene glycol or silicone oil as the main component.

[0091] In addition to the above, a slurry in which powder is dispersed can also be used as the fluid layer. From the viewpoint of improving the loss coefficient, a uniform fluid is preferable for the fluid layer, but the slurry is effective when imparting design or functionality such as coloring or fluorescence to the glass plate structure. The content of the powder in the fluid layer is preferably 0 to 10% by volume, more preferably 0 to 5% by volume. From the viewpoint of preventing sedimentation, the particle size of the powder is preferably 10 nm to 1 μm, more preferably 0.5 μm or less.

[0092] Furthermore, from the viewpoint of providing design and functionality, the fluid layer may contain a fluorescent material. In this case, the fluid layer may be a slurry in which the fluorescent material is dispersed as a powder, or a uniform fluid layer in which the fluorescent material is mixed as a liquid. This allows the glass plate structure to be endowed with optical functions such as light absorption and light emission.

[0093] When a film-like material is used for the intermediate layer, a preferable material is one that satisfies any one of the following characteristics (1) to (3). (1) The thickness of the intermediate layer is 1 mm or less; (2) Compression storage modulus at 25°C is 1.0 x 10 4 Below Pa, (3) At 25°C and 1 Hz, the compression storage modulus is higher than the compression loss modulus.

[0094] In this configuration, by satisfying properties (1), (2), and (3), the fluidity of the intermediate layer is suppressed while the loss factor is improved. Generally, when the loss factor of the glass plate structure is improved by increasing the thickness of the intermediate layer, there is a trade-off relationship in which the sound velocity value of the glass plate structure decreases as the intermediate layer becomes thicker. In contrast, in this configuration, by using an intermediate layer material that satisfies property (2), when the intermediate layer is thin, not only is the loss factor of the glass plate structure higher, but a high sound velocity value can also be ensured.

[0095] Regarding the characteristic (1), the thickness of the intermediate layer is 1 mm or less, preferably 100 μm or less, more preferably 10 μm or less, particularly preferably 5 μm or less, from the viewpoint of obtaining a high loss factor of the glass plate structure. Moreover, from the viewpoint of the surface roughness of the plate, the thickness is preferably 1 μm or more.

[0096] Regarding property (2), the material of the intermediate layer has a compressive storage modulus of 1.0 × 10 at a temperature of 25 °C. 4 Pa or less, preferably 7.0 x 10 3 Pa or less, preferably 5.0×10 3 If the material satisfies the characteristic (2), the thinner the film thickness of the intermediate layer, the higher the loss factor of the glass plate structure. 2 Pa or more.

[0097] By satisfying the characteristic (3), the fluidity of the intermediate layer is suppressed, which makes it easy to cut the glass plate structure as desired. A gel-like material can also be used as the intermediate layer material.

[0098] Materials constituting the intermediate layer, provided they satisfy any of the above characteristics (1) to (3), include, for example, carbon-based, fluorine-based, or silicone-based polymer materials. Specific examples include ABS, AES, AS, CA, CN, CPE, EEA, EVA, EVOH, IO, PMMA, PMP, PP, PS, PVB, PVC, RB, TPA, TPE, TPEE, TPF, TPO, TPS, TPU, TPVC, AAS, ACS, PET, PPE, PA6, PA66, PBN, PBT, PC, POM, PPO, ETFE, FEP, LCP, PEEK, PEI, PES, PFA, PPS, PSV, PTFE, PVDF, silicone, polyurethane, PI, and PF. Alternatively, composite materials combining the above materials may be used. The above materials may be used alone or in combination of two or more.

[0099] The proportion of the substance satisfying the above specific properties in the intermediate layer is preferably 10 to 100% by mass, more preferably 30 to 100% by mass, further preferably 50 to 100% by mass, and particularly preferably 70 to 100% by mass.

[0100] FIG. 14 is a cross-sectional view showing a specific example of a glass plate structure. The glass plate structure 11 preferably includes at least a pair of glass plates 73, 75 sandwiching the above-mentioned intermediate layer 71 from both sides. When the glass plate 73 resonates, the intermediate layer 71 prevents the glass plate 75 from resonating or damps the vibration of the resonant vibration of the glass plate 75. Due to the presence of the intermediate layer 71, the glass plate structure 11 can have a higher loss factor than a glass plate alone.

[0101] The glass plate structure 11 is preferable because the larger the loss factor, the greater the vibration damping. The loss factor of the glass plate structure 11 at 25° C. is preferably 1×10 -3 More preferably, 2×10 -3 or more, and even more preferably 5×10 -3 The longitudinal wave acoustic velocity value in the thickness direction of the glass plate structure 11 is preferably 4.0×10 because the faster the acoustic velocity, the more the reproducibility of high frequency sounds improves when the glass plate structure 11 is used as a diaphragm.3 m / s or more, and more preferably 4.5×10 3 m / s or more, and even more preferably 5.0 × 10 3 The upper limit is not particularly limited, but is 7.0 × 10 3 m / s or less is preferred.

[0102] If the glass plate structure 11 has a high linear transmittance, it can be used as a light-transmitting member. Therefore, the visible light transmittance determined in accordance with the Japanese Industrial Standards (JIS-R3106-1998) is preferably 60% or more, more preferably 65% ​​or more, and even more preferably 70% or more. Examples of light-transmitting members include transparent speakers, transparent microphones, and opening materials for buildings and vehicles.

[0103] It is also useful to match the refractive indexes in order to increase the transmittance of the glass plate structure 11. That is, the closer the refractive indexes of the glass plates and the intermediate layer constituting the glass plate structure 11, the more preferable it is, since reflection and interference at the interface are prevented. In particular, the difference between the refractive index of the intermediate layer and the refractive index of the pair of glass plates in contact with the intermediate layer is preferably 0.2 or less, more preferably 0.1 or less, and even more preferably 0.01 or less.

[0104] (glass plate) It is also possible to color at least one of the glass plates constituting the glass plate structure 11 and at least one of the intermediate layer. This is useful when it is desired to impart design to the glass plate structure 11 or when it is desired to impart functionality such as IR cut, UV cut, or privacy glass.

[0105] Of the pair of glass plates 73, 75, it is preferable that the peak top values ​​of the resonance frequencies of one glass plate 73 and the other glass plate 75 are different, and it is more preferable that the resonance frequency ranges do not overlap. However, even if the resonance frequency ranges of the glass plates 73 and 75 overlap or have the same peak top values, the presence of the intermediate layer 71 prevents the vibration of the other glass plate 75 from being synchronized when one glass plate 73 resonates. This cancels out the resonance to some extent, making it possible to obtain a higher loss factor than when the glass plates are used alone.

[0106] That is, when the resonance frequency (peak top) of glass plate 73 is Qa, the half-width of the resonance amplitude is wa, and the resonance frequency (peak top) of the other glass plate 75 is Qb, and the half-width of the resonance amplitude is wb, it is preferable that the relationship of the following [Equation 1] is satisfied. (wa+wb) / 4<|Qa-Qb| [Equation 1] The larger the value of the left side of the above [Equation 1], the larger the difference in resonance frequency (|Qa-Qb|) between the glass plates 73 and 75, and the higher the loss factor can be obtained, which is preferable.

[0107] Therefore, it is more preferable to satisfy the following [Formula 2], and it is even more preferable to satisfy the following [Formula 3]. (wa+wb) / 2<|Qa-Qb| [Equation 2] (wa+wb) / 1<|Qa-Qb| [Equation 3] The resonance frequency (peak top) and half width of the resonance amplitude of the glass plate can be measured in the same manner as the loss factor of the glass plate structure.

[0108] The smaller the difference in mass between the glass plates 73 and 75, the better, and it is even more preferable that there be no difference in mass between them. If there is a difference in mass between the glass plates, the resonance of the lighter glass plate can be suppressed by the heavier glass plate, but it is difficult to suppress the resonance of the heavier glass plate by the lighter glass plate. In other words, if there is an imbalance in the mass ratio, the resonant vibrations will not be able to cancel each other out in principle due to the difference in inertial force.

[0109] The mass ratio of the glass plate 73 to the glass plate 75 represented by (glass plate 73 / glass plate 75) is preferably 0.8 to 1.25 (8 / 10 to 10 / 8), more preferably 0.9 to 1.1 (9 / 10 to 10 / 9), and even more preferably 1.0 (10 / 10, mass difference 0).

[0110] The thinner the thickness of each of the glass plates 73 and 75, the easier it is for the glass plates to adhere to each other via the intermediate layer, and the less energy required to vibrate the glass plates. Therefore, when used as diaphragms for speakers and the like, the thinner the glass plates are, the better. Specifically, the thickness of each of the glass plates 73 and 75 is preferably 15 mm or less, more preferably 10 mm or less, even more preferably 5 mm or less, even more preferably 3 mm or less, and particularly preferably 1.5 mm or less. On the other hand, if the glass plates are too thin, the effect of surface defects on the glass plate becomes more pronounced, making them more susceptible to cracking and making them difficult to temper; therefore, the thickness is preferably 0.1 mm or more, more preferably 0.5 mm or more.

[0111] In addition, when used as opening materials for buildings and vehicles, the thickness of each of the glass plates 73 and 75 is preferably 0.5 to 15 mm, more preferably 0.8 to 10 mm, and even more preferably 1.0 to 8 mm.

[0112] The larger the loss factor of at least one of the glass plates 73 and 75, the greater the vibration damping of the glass plate structure 11, which is preferable for use as a vibration plate. Specifically, the loss factor of the glass plate at 25°C is 1×10 -4 More than 3×10 is preferable. -4 More than 5×10 is preferable. -4 The upper limit is not particularly limited, but from the viewpoint of productivity and manufacturing costs, it is preferably 5 × 10 -3 It is preferable that the following is true: It is more preferable that both the glass plate 73 and the glass plate 75 have the above loss factor. The loss factor of the glass plate can be measured in the same manner as the loss factor of the glass plate structure 11.

[0113] At least one of the glass plates 73 and 75 is preferably used as a diaphragm because the higher the longitudinal wave velocity in the thickness direction of the glass plate, the better the reproducibility of high-frequency sounds. Specifically, the glass plate has a longitudinal wave velocity of 4.0×10 3 m / s or more is preferable, 5.0 × 10 3 m / s or more is more preferable, and 6.0×10 3 The upper limit is not particularly limited, but is preferably 7.0 × 10 m / s or more from the viewpoint of productivity of the glass plate and raw material costs. 3 m / s or less. It is more preferable that both the glass plate 73 and the glass plate 75 satisfy the above sound velocity value. The sound velocity value of the glass plate can be measured in the same manner as the longitudinal wave sound velocity value in the glass plate structure.

[0114] The composition of the glass plates 73 and 75 is not particularly limited, but is preferably in the following range, for example: SiO2: 40 to 80 mass%, Al2O3: 0 to 35 mass%, B2O3: 0 to 15 mass%, MgO: 0 to 20 mass%, CaO: 0 to 20 mass%, SrO: 0 to 20 mass%, BaO: 0 to 20 mass%, Li2O: 0 to 20 mass%, Na2O: 0 to 25 mass%, K2O: 0 to 20 mass%, TiO2: 0 to 10 mass%, and ZrO2: 0 to 10 mass%, with the above composition accounting for 95 mass% or more of the entire glass.

[0115] The composition of the glass plates 73 and 75 expressed in mole percent on an oxide basis is more preferably in the following range. SiO2: 55 to 75 mass%, Al2O3: 0 to 25 mass%, B2O3: 0 to 12 mass%, MgO: 0 to 20 mass%, CaO: 0 to 20 mass%, SrO: 0 to 20 mass%, BaO: 0 to 20 mass%, Li2O: 0 to 20 mass%, Na2O: 0 to 25 mass%, K2O: 0 to 15 mass%, TiO2: 0 to 5 mass%, and ZrO2: 0 to 5 mass%, with the above composition accounting for 95 mass% or more of the entire glass.

[0116] The smaller the specific gravity of each of the glass plates 73 and 75, the less energy is required to vibrate the glass plates. Specifically, the specific gravity of each of the glass plates 73 and 75 is preferably 2.8 or less, more preferably 2.6 or less, and even more preferably 2.5 or less. There is no particular lower limit, but 2.2 or more is preferable. The larger the specific modulus of elasticity of each of the glass plates 73 and 75, which is the value obtained by dividing the Young's modulus by the density, the more rigid the glass plates can be. Specifically, the specific modulus of elasticity of each of the glass plates 73 and 75 is 2.5×10 7 m 2 / s 2 More than 2.8 × 10 is preferable. 7 m 2 / s 2 More preferably, 3.0 x 10 7 m 2 / s 2 The upper limit is not particularly limited, but is preferably 4.0 × 10 7 m 2 / s 2 The following is preferred:

[0117] The number of glass plates constituting the glass plate structure 11 may be two or more, but as shown in FIG. 15 , three or more glass plates may be used. In the case of two glass plates, the glass plate 73 and the glass plate 75 may be glass plates with different compositions, and in the case of three or more glass plates, for example, the glass plate 73, the glass plate 75, and the glass plate 77 may be glass plates with different compositions, or glass plates with the same composition and glass plates with different compositions may be used in combination. Of these, using two or more glass plates with different compositions is preferred from the viewpoint of vibration damping properties. Similarly, the masses and thicknesses of the glass plates may be all different, all the same, or some may be different. Of these, it is preferred from the viewpoint of vibration damping properties that the constituent glass plates all have the same mass.

[0118] A physically strengthened glass plate or a chemically strengthened glass plate can be used for at least one of the glass plates constituting the glass plate structure 11. This is useful for preventing breakage of the glass plate structure 11 made of a glass plate structure. When it is desired to increase the strength of the glass plate structure 11, the glass plate located on the outermost surface of the glass plate structure 11 is preferably a physically strengthened glass plate or a chemically strengthened glass plate, and it is more preferable that all of the constituting glass plates are physically strengthened glass plates or chemically strengthened glass plates.

[0119] In addition, using crystallized glass or phase-separated glass as the glass plate is also useful in terms of increasing the longitudinal wave sound velocity value and strength. In particular, when it is desired to increase the strength of the glass plate structure 11 made of a glass plate structure, the glass plate located on the outermost surface of the glass plate structure 11 is preferably crystallized glass or phase-separated glass.

[0120] The glass plate structure 11 may have a coating layer 81 shown in FIG. 16(A) or a film 83 shown in FIG. 16(B) formed on at least one surface of the glass plate structure, as long as the effects of the present invention are not impaired. The application of the coating layer 81 or the attachment of the film 83 is suitable for preventing shattering or scratches, for example. The thickness of the coating layer 81 or the film 83 is preferably 1 / 5 or less of the thickness of the surface glass plate. Conventionally known coating layers 81 and films 83 can be used for the coating layer 81 or the film 83. Examples of coating layers 81 that can be used include water-repellent coatings, hydrophilic coatings, water-slip coatings, oil-repellent coatings, anti-reflection coatings, and heat-shielding coatings. Examples of films 83 that can be used include shatterproof glass films, color films, UV-cut films, IR-cut films, heat-shielding films, and electromagnetic wave-shielding films.

[0121] (sealing material) 17, at least a part of the outer peripheral end face of the glass plate construct 11 may be sealed with a sealing material 87 that does not hinder vibration of the glass plate construct 11. As the sealing material 87, highly elastic rubber, resin, gel, etc. can be used. 18, in order to prevent peeling at the interfaces between the glass plates 73, 75 of the glass plate structure 11 and the intermediate layer 71, the above-mentioned sealant 87 can be applied to at least a portion of the surfaces of the opposing glass plates 73, 75 within a range that does not impair the effects of the present invention. In this case, the area of ​​the sealant application portion is preferably 20% or less of the area of ​​the intermediate layer 71 so as not to interfere with vibration, more preferably 10% or less, and particularly preferably 5% or less.

[0122] Resins used for the sealing material 87 include acrylic, cyanoacrylate, epoxy, silicone, urethane, and phenolic resins. Curing methods include one-component, two-component mixture, heat curing, UV curing, and visible light curing. Thermoplastic resins (hot melt bonds) can also be used for the sealing material 87. Examples include ethylene vinyl acetate, polyolefin, polyamide, synthetic rubber, acrylic, and polyurethane. Rubbers that can be used include natural rubber, synthetic natural rubber, butadiene rubber, styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, chloroprene rubber, acrylic rubber, chlorosulfonated polyethylene rubber (Hypalon), urethane rubber, silicone rubber, fluororubber, ethylene-vinyl acetate rubber, epichlorohydrin rubber, polysulfide rubber (Thiokol), and hydrogenated nitrile rubber. If the thickness t of the sealing material 87 is too thin, sufficient strength will not be ensured, and if it is too thick, vibration will be impaired. Therefore, the thickness of the sealing material 87 is preferably 10 μm or more and 5 times or less the total thickness of the glass plate structure, and more preferably 50 μm or more and thinner than the total thickness of the glass plate structure.

[0123] 19A and 19B are diagrams showing another embodiment of the glass plate construct 10, in which (A) is a plan view of the glass plate construct 11 and (B) is a cross-sectional view taken along line XIX-XIX in (A). The glass plate construct 11 of Fig. 19 has a frame 80 provided on the outer edge of the glass plate construct 11, at least on the outermost surface of the glass plate construct 11. This is a cross-sectional view showing another embodiment of the glass plate construct 11.

[0124] In this way, a frame (frame) 80 may be provided on at least one outermost surface of the glass plate structure 11, as long as the effect of the present invention is not impaired. The frame 80 is useful when it is necessary to improve the rigidity of the glass plate structure 11, when it is necessary to firmly hold the structure so as to suppress low-frequency vibrations, or when it is necessary to maintain a curved shape. The frame 80 can be made of any conventional material, including metals such as aluminum, iron, stainless steel, and magnesium; ceramics and single crystal materials such as Al2O3, SiC, Si3N4, AlN, mullite, zirconia, yttria, and YAG; fiber materials and other composite materials such as carbon fiber and Kevlar fiber; organic glass materials and transparent resin materials such as PMMA, PC, PS, PET, and cellulose; rubber materials such as butyl rubber, silicone rubber, and urethane rubber; vibration-damping gel materials such as urethane gel and silicone gel; and wood materials such as lauan, teak, and plywood. In order to prevent leakage of the intermediate layer 71 from the frame 80, a sealant 87 may be provided between the glass plate structure 11 and the frame.

[0125] 20A and 20B are views showing another embodiment of the glass plate structure 11, in which (A) is a plan view of the glass plate structure 11 and (B) is a cross-sectional view taken along the line XX-XX in (A). As shown in Fig. 20, the frame 80 may be provided on the outermost surface of one glass plate 73 of the glass plate structure 11.

[0126] FIG. 21 is a diagram showing another form of the glass plate structure 11, in which (A) is a plan view of the glass plate structure 11, (B) is a cross-sectional view taken along line XXI-XXI in (A), and (C) is an enlarged view of part C in (B).

[0127] 21(B) and 21(C), the edge surfaces of the first glass plate 73 and the second glass plate 75 are misaligned to form a stepped portion 90 that is stair-shaped in cross section. A sealing material 87 is provided in this stepped portion 90 so as to seal at least the intermediate layer 71.

[0128] At the step portion 90, the sealant 87 is in close contact with the edge surface 73a of the first glass plate 73, the edge surface 71a of the intermediate layer 71, and the main surface 75a of the second glass plate 75. With this configuration, the intermediate layer 71 is sealed by the sealant 87, preventing leakage of the intermediate layer 71 and strengthening the bonding between the first glass plate 73, the intermediate layer 71, and the second glass plate 75, thereby increasing the strength of the glass plate structure 11.

[0129] In addition, in this configuration, the edge surface 73a of the first glass plate 73 and the edge surface 71a of the intermediate layer 71 are configured to be perpendicular to the main surface 75a of the second glass plate 75 at the step portion 90. As a result, the sealing material 87 has an L-shaped contour extending along the step portion 90 in a cross-sectional view. With this configuration, the bonding between the first glass plate 73, the intermediate layer 71, and the second glass plate 75 is further strengthened, and the strength of the glass plate structure 11 is further increased.

[0130] Furthermore, in this configuration, the sealing material 87 has a tapered surface 87a. The edge of the glass plate structure 11 is sometimes tapered, and by employing such a shape of the sealing material 87, it is possible to obtain the same effect as when the glass plate structure is processed.

[0131] FIG. 22 is a diagram showing another embodiment of the glass plate structure 11, where (A) is a plan view of the glass plate structure 11 and (B) is a cross-sectional view taken along line XXII-XXII in (A). In the glass plate construct 11 of this configuration, unlike the other configuration examples, the step portion 90 and the sealant 87 are not provided on the periphery of the glass plate construct 11, but are provided approximately in the center of the glass plate construct 11 in a plan view. This configuration also satisfies the requirement that the end faces of the two glass plates (the first glass plate 73 and the second glass plate 75) are arranged offset from each other. This increases the strength of the glass plate construct 11. In addition, a seal tape 93 is attached to the peripheral end face of the glass plate construct 11 to seal the intermediate layer 71.

[0132] The glass plate construction 11 may be flat, or may be curved (bent) to fit the installation location, as shown in Fig. 23. Although not shown, the glass plate construction 11 may have a shape including both flat and curved portions. In other words, the glass plate construction 11 may have a three-dimensional shape having at least a concavely or convexly curved portion in at least a portion thereof. By forming the glass plate construction 11 into a three-dimensional shape to fit the installation location in this way, the appearance at the installation location can be improved, and the design can be enhanced.

[0133] Furthermore, in the glass plate structure 11 in which the step portion 90 on the outer edge is sealed with the sealant 87, as shown in FIG. 24A, the glass plate structure 11 may be formed into a curved shape (three-dimensional shape) so that the glass plate 75 side is recessed. In this case, the outer edge of the glass plate 75 extends outward beyond the glass plate 73. Also, as shown in FIG. 24B, the glass plate structure 11 may have a curved shape that is the inverse of (A). In this case, the outer edge of the glass plate 75 also extends outward beyond the glass plate 73.

[0134] In the case of these glass plate structures 11, when viewed from the glass plate 75 side, the sealing material 87 is disposed on the rear side of the glass plate 75, so that the sealing material 87 can be hidden and not seen from the glass plate 75 side. This improves the appearance at the installation location, and further enhances the design of the glass plate structure 11 itself.

[0135] The present invention is not limited to the above-described embodiments, and the present invention also contemplates the mutual combination of the various components of the embodiments, as well as modifications and applications by those skilled in the art based on the description in the specification and well-known techniques, and these modifications and applications are included in the scope of protection sought.

[0136] As described above, the present specification discloses the following: (1) A glass plate structure that includes a plurality of laminated glass plates and includes an intermediate layer between at least one pair of the glass plates, and that separates an indoor space from an outdoor space; a vibration output unit fixed to the glass plate structure and vibrating the glass plate structure in response to an input signal; an outdoor sound detection unit that detects a sound from a noise source or a vibration source that is correlated with the sound wave vibration induced in the glass plate structure and outputs a reference signal according to the detection result; an indoor sound detection unit that detects sounds in the indoor space and outputs an error signal according to the detection result; a control unit that has an adaptive filter that generates a cancellation signal that is in opposite phase to the reference signal so that the error signal is minimized, and that outputs the cancellation signal from the adaptive filter to the vibration output unit; A sound-proofing device comprising: According to this sound-insulating device, the transmission of noise from outside to inside the room can be suppressed by vibrating the glass plate structure using the vibration output unit. This effectively reduces high-frequency noise that has been difficult to cancel out by canceling sound from a speaker when it enters the room. Moreover, since the inflow of outside noise through the window itself can be suppressed, the room can be made quieter regardless of the sound environment inside the room. In other words, the inflow of noise from a wide frequency range, including high frequencies, through the window can be suppressed, creating a quieter, more comfortable indoor environment.

[0137] (2) The loss coefficient of the glass plate structure at 25°C is 1 × 10 -2 or more, and the longitudinal wave velocity in the thickness direction at 25°C is 4.0 × 10 3 The sound-proofing device according to (1), wherein the sound-proofing force is m / s or more. According to this sound-insulating device, vibration damping can be increased by increasing the loss factor, and the reproducibility of sounds in the high frequency range can be improved by increasing the longitudinal wave sound velocity.

[0138] (3) The sound-proofing device according to (1) or (2), wherein the intermediate layer is a liquid. According to this sound-proofing device, when one glass plate resonates, the liquid intermediate layer can prevent the other glass plate from resonating, and can also damp vibrations caused by the resonant vibrations of the glass plates.

[0139] (4) The sound-proofing device according to (1) or (2), wherein the intermediate layer is a gel-like material. According to this sound-proofing device, when one glass plate resonates, the intermediate layer made of a gel material can prevent the other glass plate from resonating and can also attenuate the vibration caused by the resonant vibration of the glass plate.

[0140] (5) The sound-proofing device according to (1) or (2), wherein the intermediate layer is made of any one of polyvinyl butyral, ethylene vinyl acetate copolymer resin, and polyurethane. According to this sound-insulating device, when one glass plate resonates, the intermediate layer can prevent the other glass plate from resonating, and can also attenuate vibrations caused by the resonating glass plate.

[0141] (6) The sound insulation device according to any one of (1) to (5), further comprising an auxiliary speaker connected to the control unit and configured to output a cancellation sound in response to the cancellation signal. According to this soundproofing device, the secondary noise caused by the vibration of the vibration output unit can be cancelled out by outputting a cancellation sound from the auxiliary speaker in response to the cancellation signal sent to the vibration output unit, thereby further enhancing the noise reduction effect in the room.

[0142] (7) The sound insulation device according to any one of (1) to (6), wherein the glass plate structure is at least one of a side window, a rear window, a front window, and a roof glazing of a vehicle. This soundproofing device can suppress the inflow of noise from glass plate structures provided on the side windows, rear window, front window, roof glazing, etc. of a vehicle, thereby making the interior of the vehicle quieter.

[0143] (8) The sound-proofing device according to any one of (1) to (6), wherein the glass plate structure is a window for a house. This soundproofing device can suppress the inflow of noise from a glass plate structure provided in a residential window, thereby making the interior of the house quieter.

[0144] (9) An enclosing member that surrounds an area of ​​the glass plate construct where the vibration output unit is fixed and supports the glass plate construct by exposing an area of ​​the glass plate construct where the vibration output unit is not fixed to the outside through an opening. The opening and the glass plate structure are acoustically shielded from each other, and the glass plate structure is a shielding member that divides the enclosure into a vibration region inside the enclosure and a vibration region outside the enclosure; an internal space sound detection unit that is provided inside the enclosing member, detects the sound emitted by the vibration output unit, and outputs the error signal according to the detection result; The sound-proofing device according to any one of (1) to (8), comprising: According to this sound-proofing device, the vibration region of the glass plate structure, in which the vibration output unit is provided, is located inside the internal space defined by the enclosure member and is separated by the shielding member. When the vibration output unit vibrates, sound is emitted from the vibration region of the glass plate structure outside the internal space, i.e., the portion of the glass plate structure where one end is exposed to the outside of the internal space through the opening of the internal space, forming a uniform sound pressure distribution. Furthermore, noise leakage from the internal space can be suppressed, and a decrease in directivity can be suppressed. Furthermore, the enclosure member is provided with an internal space sound detection unit inside that detects the sound emitted by the vibration output unit and outputs an error signal according to the detection result. Therefore, the control unit can output a cancellation signal so that the error signal from the internal space sound detection unit is minimized. As a result, for example, by sending a cancellation signal to a speaker provided inside the enclosure member or an acoustic speaker in the room to output a cancellation sound, it is possible to cancel out the sound generated in the internal space of the enclosure member due to the vibration of the vibration output unit, thereby further improving the noise reduction effect in the room.

[0145] (10) When a direction in which the glass plate structure protrudes from the inside to the outside of the internal space of the enclosing member is defined as a first direction and a direction perpendicular to the first direction in the plate plane is defined as a second direction, The sound insulation device according to (9), wherein the maximum width of the glass plate structure in the second direction is equal to or greater than the maximum width in the first direction. With this soundproofing device, the distance from the vibration output unit arranged in the vibration region of the glass plate structure is not excessively long across the entire vibration region, and vibrations from the vibration output unit are propagated to the vibration region with sufficient strength.

[0146] (11) The sound-proofing device according to (9) or (10), wherein a ratio Ss / Sv of an area Ss of the excitation region of the glass plate structure to an area Sv of the vibration region is 0.01 or more and 1.0 or less. This sound-proofing device can realize efficient vibration driving without reducing the efficiency of generating sound pressure due to acoustic radiation from the vibration region A2 in response to vibrations generated by the vibration output section.

[0147] (12) The total area of ​​the glass plate structure is 0.01 m 2 The sound-proofing device according to any one of (9) to (11) above. According to this sound-proofing device, by dividing the area into an excitation area and a vibration area, it becomes easier to obtain the effect of forming a uniform sound pressure distribution and the effect of suppressing a decrease in directivity.

[0148] (13) The sound insulation device according to any one of (9) to (12), further comprising a support member for supporting the glass plate structure on the enclosing member. According to this sound-proofing device, the glass plate structure is supported on the enclosing member by the support member.

[0149] (14) The sound insulation device according to any one of (9) to (13), wherein the glass plate structure is supported so as to be movable relative to the enclosing member. According to this sound-insulating device, the glass plate structure is moved relative to the enclosing member to open and close the space between the inside and outside of the room, thereby providing a sound-insulating effect as required.

[0150] (15) The shielding member has a storage modulus of 1.0×10 at 25° C. and a frequency of 1 Hz. 2 ~1.0×10 10 The sound-proofing device according to any one of (9) to (14), wherein Pa. This sound-proofing device can prevent sound leakage while suppressing the attenuation of vibrations of the glass plate assembly.

[0151] (16) The sound-proofing device according to any one of (9) to (15), wherein the vibration region of the glass plate structure is formed of a single glass plate. This sound-proofing device makes it possible to vibrate the glass plate structure with high energy efficiency.

[0152] (17) The sound insulation device according to any one of (1) to (16), wherein the vibration output units are arranged at a plurality of locations on the glass plate structure. According to this sound-insulating device, vibrations are applied to the glass plate structure from a plurality of vibration output units, so that the vibrations can be distributed more uniformly in the vibration region.

[0153] (18) The sound insulation device according to any one of (1) to (17), wherein the vibration output portion is disposed on only one surface of the glass plate structure. According to this sound-insulating device, when the space for arranging the vibration output units in the thickness direction of the glass plate structure is limited, the vibration output units can be arranged efficiently.

[0154] (19) The sound insulation device according to any one of (1) to (17), wherein the vibration output units are arranged on both sides of the glass plate structure. According to this sound-insulating device, when the area of ​​the glass plate structure is limited, the vibration output section can be arranged efficiently.

[0155] (20) The sound insulation device according to any one of (1) to (19), wherein the glass plate structure is flat. This sound-proofing device makes it easier to process the glass plate structure, thereby reducing costs.

[0156] (21) The sound insulation device according to any one of (1) to (19), wherein the glass plate structure has at least a part of a concave or convex curved surface. According to this sound insulation device, the shape of the glass plate structure can be freely set depending on the installation position and installation purpose of the sound insulation device.

[0157] (22) A sound-insulating method for separating an indoor space from an outdoor space, the sound-insulating method comprising: vibrating a glass plate structure, which is configured by stacking a plurality of glass plates and including an intermediate layer between at least one pair of the glass plates, in response to an input signal; a step of detecting a sound from a noise source or a vibration source that is correlated with the acoustic vibration induced in the glass plate structure, and outputting a reference signal according to the detection result; detecting a sound in the indoor space and outputting an error signal according to the detection result; generating an adaptive filter for generating a cancellation signal having an opposite phase to the reference signal so that the error signal is minimized, and vibrating the glass plate structure in response to the cancellation signal from the adaptive filter; A sound insulation method having the following features. According to this sound insulation method, the transmission of noise from outside to inside the room can be suppressed by vibrating the glass plate structure in response to a cancellation signal that minimizes the error signal. This makes it possible to effectively reduce high-frequency noise (for example, noise above 150 Hz), which is difficult to achieve by canceling noise that has entered the room using a cancellation sound from a speaker. Moreover, since the inflow of outside noise through the window itself can be suppressed, the room can be made quieter regardless of the sound environment inside the room. In other words, noise over a wide frequency range, including high frequencies, can be suppressed from entering through the window, creating a quieter, more comfortable indoor environment.

[0158] This application is based on a Japanese patent application (Patent Application No. 2021-9668) filed on January 25, 2021, the contents of which are incorporated by reference into this application. [Explanation of symbols]

[0159] 1. Outdoor sound detection unit 3. Indoor sound detection section 5. Control section 7. Acoustic speakers 8. Internal space sound detection unit 9 Auxiliary Speaker 11 Glass plate structure 13 Vibration output unit 15 Enclosure material 17 Shielding material 21 Opening 23 Support member 35 Adaptive Filter 71 Middle Class 73,75 Glass plate A1 Excitation area A2 Vibration area FSW Front Side Window (Side Window) FW front windshield RG Roof Glazing RW rear window S vehicle WD window

Claims

1. a glass plate structure including a plurality of laminated glass plates and including an intermediate layer between at least one pair of the glass plates, the glass plate structure separating an indoor space from an outdoor space; a vibration output unit fixed to the glass plate structure and vibrating the glass plate structure in response to an input signal; an outdoor sound detection unit that detects a sound from a noise source or a vibration source that is correlated with the sound wave vibration induced in the glass plate structure and outputs a reference signal according to the detection result; an indoor sound detection unit that detects sounds in the indoor space and outputs an error signal according to the detection result; a control unit that has an adaptive filter that generates a cancellation signal that is in opposite phase to the reference signal so that the error signal is minimized, and that outputs the cancellation signal from the adaptive filter to the vibration output unit, an enclosing member that surrounds an area of ​​the glass plate construct to which the vibration output unit is fixed and supports the glass plate construct by exposing an area of ​​the glass plate construct to which the vibration output unit is not fixed from an opening to the outside; a shielding member that acoustically shields the opening and the glass plate structure and divides the glass plate structure into a vibration region inside the enclosing member and a vibration region outside the enclosing member; an internal space sound detection unit that is provided inside the enclosing member, detects the sound emitted by the vibration output unit, and outputs the error signal according to the detection result; A sound-proofing device comprising:

2. The loss coefficient of the glass plate structure at 25°C is 1 × 10 －２ or more, and the longitudinal wave sound velocity in the plate thickness direction at 25°C is 4.0 × 10 ３ m / s or more, 2. The sound insulating device of claim 1.

3. The intermediate layer is a liquid.

2. The sound insulating device of claim 1.

4. The intermediate layer is a gel-like material.

2. The sound insulating device of claim 1.

5. the intermediate layer is made of any one of polyvinyl butyral, ethylene vinyl acetate copolymer resin, and polyurethane; 2. The sound insulating device of claim 1.

6. further comprising an auxiliary speaker connected to the control unit and configured to output a cancellation sound in response to the cancellation signal; 2. The sound insulating device of claim 1.

7. The glass plate structure is at least one of a side window, a rear window, a front window, and a roof glazing of a vehicle.

2. The sound insulating device of claim 1.

8. The glass plate structure is a window for a house.

2. The sound insulating device of claim 1.

9. When a direction in which the glass plate structure protrudes from the inside to the outside of the internal space of the enclosing member is defined as a first direction and a direction perpendicular to the first direction in the plate plane is defined as a second direction, The maximum width in the second direction of the glass plate structure is equal to or greater than the maximum width in the first direction.

2. The sound insulating device of claim 1.

10. The ratio Ss / Sv of the area Ss of the vibration region of the glass plate structure to the area Sv of the vibration region is 0.01 or more and 1.0 or less.

2. The sound insulating device of claim 1.

11. The total area of ​​the glass plate structure is 0.01 m ２ That's all.

2. The sound insulating device of claim 1.

12. a support member for supporting the glass plate structure on the enclosing member; 2. The sound insulating device of claim 1.

13. The glass plate structure is supported so as to be movable relative to the enclosing member.

2. The sound insulating device of claim 1.

14. The storage modulus of the shielding member at 25°C and a frequency of 1 Hz is 1.0 × 10 ２ ~1.0 x 10 １０ Pa, 2. The sound insulating device of claim 1.

15. The vibration region of the glass plate structure is composed of a single glass plate.

2. The sound insulating device of claim 1.

16. The vibration output units are arranged at a plurality of locations on the glass plate structure. A sound insulating device according to any one of claims 1 to 15.

17. The vibration output unit is arranged on only one surface of the glass plate structure. A sound insulating device according to any one of claims 1 to 15.

18. The vibration output units are disposed on both sides of the glass plate structure. A sound insulating device according to any one of claims 1 to 15.

19. The glass plate structure is flat. A sound insulating device according to any one of claims 1 to 15.

20. The glass plate structure has at least a partially concave or convex curved surface, A sound insulating device according to any one of claims 1 to 15.

21. A sound-insulating method for separating an indoor space from an outdoor space, the sound-insulating method comprising: vibrating a glass plate structure, which is configured by stacking a plurality of glass plates and including an intermediate layer between at least one pair of the glass plates, in response to an input signal; a step of detecting a sound from a noise source or a vibration source that is correlated with the acoustic vibration induced in the glass plate structure, and outputting a reference signal according to the detection result; detecting a sound in the indoor space and outputting an error signal according to the detection result; generating an adaptive filter for a cancellation signal having an opposite phase to the reference signal so that the error signal is minimized, and vibrating the glass plate structure in response to the cancellation signal from the adaptive filter, an enclosing member surrounds the vibrating region of the glass plate construct and supports the glass plate construct by exposing the non-vibrating region of the glass plate construct to the outside through an opening; a shielding member acoustically shielding the opening and the glass plate structure, dividing the glass plate structure into a vibration region inside the enclosing member and a vibration region outside the enclosing member; an internal space sound detection unit provided inside the enclosure member, detecting the sound emitted by the vibration, and outputting the error signal according to the detection result; Soundproofing methods.

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