Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R7/00—Diaphragms for electromechanical transducers; Cones
  • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
  • H04R7/04—Plane diaphragms
  • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
  • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
  • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
• • G—PHYSICS
  • G10—MUSICAL INSTRUMENTS; ACOUSTICS
  • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
  • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
  • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
  • G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
  • G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
  • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R29/00—Monitoring arrangements; Testing arrangements
  • H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R3/00—Circuits for transducers
  • H04R3/04—Circuits for transducers for correcting frequency response
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R7/00—Diaphragms for electromechanical transducers; Cones
  • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
  • H04R7/04—Plane diaphragms
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R7/00—Diaphragms for electromechanical transducers; Cones
  • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
  • H04R7/04—Plane diaphragms
  • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
  • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
  • H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
  • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
  • H04R2499/10—General applications
  • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

• the technology of the present disclosure relates to a vibration device and a vibration method.
• the speaker device described in International Publication No. 2019/172076 includes a diaphragm that transmits light (e.g., a glass plate, a translucent ceramic, etc.), an exciter that generates vibration, and a vibrator that generates vibration.
• a vibration transmission section is connected to the plate and the exciter and transmits vibrations from the exciter to the diaphragm.
• the loss coefficient of this diaphragm at 25°C is 1 ⁇ 10 -2 or more, and the specific elastic modulus of the vibration transmission part is 20 mm 2 /s 2 or more, which impairs the design of the diaphragm while maintaining acoustic performance. It exhibits excellent design without any effort.
• a device that reduces indoor noise by detecting the sound of a noise source and outputting a sound with a phase opposite to the detected sound
• Japanese Patent Laid-Open No. 9-288489 Japanese Patent Application Laid-Open No. 9-288489
• a first microphone placed inside the vehicle outputs an acoustic signal that detects the frequency of the noise, and in response to this acoustic signal, a signal with the same amplitude as the detected noise is output.
• a sound with an opposite phase is generated into the vehicle interior as an opposite phase sound (secondary sound) from a speaker placed in the headrest.
• a second microphone placed near the speaker detects residual noise in the vehicle interior and inputs the detected detection signal to the control means.
• the control means updates the coefficients of the adaptive filter using an adaptive algorithm so that the detection signal is minimized based on the acoustic signal and the detection signal, and controls the anti-phase sound output from the speaker. ing.
• this noise reduction device the noise that can be heard by the occupants in the vehicle interior is reduced by outputting the opposite phase sound of the noise from the speaker built into the headrest.
• It also includes a vibration output unit that vibrates the window glass plate that partitions indoor space and outdoor space, and detects noise sources/vibration sources that are correlated with the sonic vibrations induced in the glass plate, and generates a reference signal according to the detection results.
• a feedforward microphone that outputs sound in the room
• a feedback microphone that detects the sound in the room and outputs an error signal according to the detection result, and generates a cancellation signal that is in the opposite phase of the reference signal so that the error signal is minimized.
• a noise device is known that includes a filter that performs a noise reduction, and an ANC process that outputs the cancellation signal to a vibration output section (US2018/0082673A).
• the noise device of US2018/0082673A generates a destructive interference signal for use in active noise cancellation in an interior setting of an indoor space.
• the speaker device described in International Publication No. 2019/172076 provides an intermediate layer between a pair of substrates (for example, a glass plate), and can achieve a high loss coefficient when the intermediate layer is a liquid. , disclose that reducing the thickness provides better vibration transmission. Further, Japanese Patent Application Publication No. 9-288489 and US2018/0082673A do not disclose a technique for reducing noise in the vehicle interior space.
• the technology of the present disclosure aims to provide a vibration device and a vibration method using a glass diaphragm, which enable output of sound faithful to an acoustic signal.
• a first aspect of the present disclosure is a vibration device, comprising: a glass plate arrangement comprising at least one glass plate; a vibration output unit fixed to the glass plate structure and vibrating the glass plate structure according to an input signal; a detection unit that detects sound or vibration emitted by the glass plate structure and outputs a detection signal according to the detection result; a signal output section that outputs an arbitrary acoustic signal; a control unit that includes a controller that generates a correction signal that corrects the acoustic signal so that the detection signal and the acoustic signal correspond, and inputs the correction signal from the controller to the vibration output unit; Equipped with.
• a second aspect of the present disclosure is a vibration method, comprising: A vibration method in which a glass plate structure including at least one glass plate is vibrated by a vibration output unit fixed to the glass plate structure according to an input signal, the method comprising: Detecting sound or vibration emitted by the glass plate structure and outputting a detection signal according to the detection result, Output any acoustic signal, a controller that generates a correction signal that corrects the acoustic signal so that the detection signal and the acoustic signal correspond, and inputs the correction signal from the controller to the vibration output section; The glass plate structure is vibrated by the vibration output section according to the correction signal.
• FIG. 1 is a schematic configuration diagram of a vehicle to which a vibration device according to a first embodiment is applied.
• FIG. 1 is a schematic configuration diagram of a vehicle door to which a vibration device is applied.
• FIG. 2 is a front view of the vibrating device for explaining the configuration of the vibrating device. 4 is a cross-sectional view taken along the line IV-IV shown in FIG. 3.
• FIG. 3 is a partial cross-sectional view showing how the vibration output section is attached to the glass plate structure.
• FIG. 2 is a functional block diagram of a vibration device applied to a vehicle. It is a figure which shows the vibration waveform of a glass plate structure when an acoustic signal is output without correction
• FIG. 2 is a diagram illustrating a configuration example of series-connected controllers constituting an adaptive filter.
• FIG. 2 is a diagram illustrating a configuration example of controllers connected in parallel and forming an adaptive filter.
• FIG. 3 is a schematic configuration diagram of a vehicle door equipped with a vibration device having another configuration.
• FIG. 3 is a functional block diagram of a vibration device having another configuration.
• FIG. 3 is a functional block diagram of a vibration device having another configuration.
• FIG. 3 is a functional block diagram of a vibration device having another configuration.
• FIG. 2 is a schematic diagram of a vibration device according to a second embodiment provided in a door of a vehicle.
• FIG. 14 is a schematic cross-sectional view taken along line III-III shown in FIG. 13.
• FIG. FIG. 2 is a functional block diagram of a vibration device applied to a vehicle.
• FIG. 2 is a schematic cross-sectional view showing the configuration of a glass diaphragm.
• 17 is a schematic cross-sectional view of a glass diaphragm showing another example of the arrangement of the temperature control section shown in FIG. 16.
• FIG. FIG. 14 is an explanatory diagram showing a temperature control area by a temperature control section disposed on the glass diaphragm shown in FIG. 13;
• FIG. 14 is an explanatory diagram showing a temperature control area by a temperature control section disposed on the glass diaphragm shown in FIG. 13;
• FIG. 13 is an explanatory diagram showing a temperature control area by a temperature control section disposed on the glass diaphragm shown in FIG. 13;
• FIG. 14 is an explanatory diagram showing a temperature control area by a temperature control section disposed on the glass diaphragm shown in FIG. 13;
• FIG. 14 is an explanatory diagram showing a temperature control area by a temperature control section disposed on the glass diaphragm shown in FIG. 13;
• FIG. 2 is a partial cross-sectional view showing a structure in which a heat ray reflective layer is provided on a glass diaphragm.
• FIG. 3 is a partial cross-sectional view showing a configuration in which one glass plate of the glass diaphragm is made thinner than the other glass plate. It is a sectional view showing another example of composition of a glass diaphragm.
• FIG. 2 is a plan view of a vehicle showing a location where a glass diaphragm is applied to the vehicle. It is a schematic diagram showing an example in which a glass diaphragm is applied to a window of a house.
• glass diaphragm is a general term that includes a configuration in which a vibration output section 13 is attached to a glass plate structure 11, which will be described later.
• FIG. 1 is a schematic configuration diagram of a vehicle S to which a vibration device is applied.
• FIG. 2 is a schematic diagram of a door D of a vehicle S to which a vibration device is applied.
• the vibration device is built into a vehicle S, and radiates sound into the exterior and interior of the vehicle S.
• the vibration device includes a glass plate structure 11, a vibration output section 13, a sound output device 1, an indoor sound detection section 3, and a control section 5.
• the vibration output section 13, the sound output device 1, and the indoor sound detection section 3 are each connected to the control section 5.
• the vehicle S is provided with acoustic speakers 7 that constitute an audio system indoors, and these acoustic speakers 7 are also connected to the control unit 5 .
• the glass plate structure 11 is provided on a door D of the vehicle S, and is used as a front side window FSW that partitions an indoor space and an outdoor space of the vehicle S.
• the vibration output unit 13 is, for example, a voice coil motor, and is attached to the glass plate structure 11.
• the vibration output unit 13 vibrates in response to a drive signal input from the control unit 5 and applies the vibration to the glass plate structure 11 .
• the sound output device 1 is, for example, an audio playback device. This sound output device 1 outputs an arbitrary acoustic signal. Specifically, this sound output device 1 is provided inside the vehicle S, and the acoustic signal is transmitted to the control unit 5.
• the indoor sound detection unit 3 is, for example, a microphone, and is provided inside the vehicle S to detect indoor sounds.
• This indoor sound detection unit 3 is preferably disposed near the glass plate structure 11 and the occupant's ears in the room, or is preferably attached to the occupant's ears. If the microphone is to be worn on the passenger's ear, a wireless microphone is more preferable.
• the sound signal detected by the indoor sound detection section 3 is transmitted to the control section 5 as a detection signal.
• the door D of the vehicle S equipped with the glass plate structure 11 has an enclosing member 15 that supports the glass plate structure 11.
• a region of the glass plate structure 11 to which the vibration output section 13 is fixed is housed inside the enclosure member 15 .
• This enclosing member 15 has an opening 21 and exposes a region of the glass plate structure 11 to which the vibration output section 13 is not fixed to the outside from the opening 21.
• the enclosure member 15 includes a shielding member 17 at the opening 21, and the shielding member 17 acoustically shields the space between the opening 21 and the glass plate structure 11.
• FIG. 3 is a front view of the vibrating device for explaining the configuration of the vibrating device.
• FIG. 4 is a cross-sectional view taken along the line IV-IV shown in FIG.
• FIG. 5 is a partial cross-sectional view showing how the vibration output section 13 is attached to the glass plate structure 11.
• the glass plate structure 11 is supported by an enclosure member 15.
• the glass plate structure 11 is excited by the vibrations generated by the vibration output section 13 and generates sound.
• the glass plate structure 11 may have a translucent property that allows the rear side of the glass plate structure 11 to be seen through when viewed from the direction of the arrow Va in FIG.
• the glass plate structure 11 may have selective light transmittance, such as an optical filter or a surface treatment layer whose surface is made into a light diffusing surface.
• a light control film is installed on the surface of the single glass, or when the glass plate structure 11 is a laminated glass described later, between multiple intermediate layers. Good too.
• the glass plate structure 11 includes at least one glass plate. So-called laminated glass, which includes a plurality of glass plates with an intermediate layer between them, is preferred. For example, as shown in FIG. 5, the glass plate structure 11 of this example includes a pair of glass plates 73 and 75 laminated, and an intermediate layer 71 between these glass plates 73 and 75.
• the glass plate structure 11 is preferably made of a material with a high longitudinal sound velocity value, and for example, materials such as glass, translucent ceramics, and single crystals such as sapphire can be used.
• 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.
• the vibration output unit 13 is fixed to the glass plate structure 11 and vibrates the glass plate structure 11 according to the input drive signal.
• the vibration output section 13 includes, for example, a coil section, a magnetic circuit section, and an excitation section connected to the coil section or the magnetic circuit section.
• vibration output section 13 when a drive signal from the control section 5 is input to the coil section, vibration is generated in the coil section or the magnetic circuit section due to interaction between the coil section and the magnetic circuit section.
• the vibrations of the coil section or the magnetic circuit section are transmitted to the vibrating section, and from the vibrating section to the glass plate structure 11.
• At least one vibration output section 13 is attached to the glass plate structure 11 .
• two vibration output units 13 may be attached to one main surface of the glass plate structure 11 along one side of the outer edge of the glass plate structure 11 at intervals.
• the vibration output part 13 may be provided on each of the one main surface and the other main surface of the glass plate structure 11 like the vibration output part 13 shown by the dotted line in FIG.
• the enclosing member 15 included in the door D of the vehicle S is formed in a box shape that surrounds a portion of the glass plate structure 11 that includes the fixed position of the vibration output section 13 .
• the enclosing member 15 defines an internal space 19 that includes the vibration output section 13 and a portion of the glass plate structure 11 .
• the other portion of the glass plate structure 11 is exposed to the outside of the internal space 19 through an opening 21 of the internal space 19 formed in the enclosing member 15 . That is, a part of the glass plate structure 11 is exposed to the outside of the internal space 19 through the opening 21 of the internal space 19.
• the shielding member 17 provided in the opening 21 of the enclosing member 15 closes the internal space 19 and moves the glass plate structure 11 into an excitation area A1 in which the vibration output section 13 is provided inside the internal space 19. and a vibration area A2 outside the internal space 19.
• the shielding member 17 it is possible to use polymeric materials in general having a hydrocarbon composition, silicone composition, fluorine-containing composition, and rubber in general.
• the storage elastic modulus G is 1.0 ⁇ 10 2 to 1.0 ⁇ 10 10 Pa.
• shielding by the above-mentioned shielding member 17 refers to a state in which the glass plate structure 11 is not completely fixed, but is in contact with the glass plate structure 11 to an extent that allows slight movement of 1 mm or less. This prevents sound leakage from the internal space 19.
• a drive mechanism for raising and lowering the glass plate structure 11 provided at the bottom of the internal space 19 of the enclosure member 15 or in the internal space 19, and an excitation area A1 of the glass plate structure 11 are provided.
• a support member 23 for supporting the glass plate structure 11 on the enclosing member 15 is provided between the glass plate structure 11 and a part of the support member 23 .
• This support member 23 is made of an elastic sheet having cushioning properties, such as rubber, felt, sponge, or the like. Note that this glass plate structure 11 can be freely moved relative to the enclosure member 15 by the drive mechanism (not shown). That is, by moving the front side window FSW made of the glass plate structure 11, the window of the vehicle S can be opened and closed.
• the direction in which the glass plate structure 11 projects from the internal space 19 inside the enclosure member 15 to the outside of the internal space 19 is the first direction Ax1
• the direction perpendicular to the first direction within the plate surface is the direction Ax1.
• the maximum width Lw of the glass plate structure 11 in the second direction Ax2 is preferably greater than or equal to the maximum width Lh in the first direction Ax1 (Lw ⁇ Lh).
• the distance from the vibration output unit 13 arranged in the vibration region A1 of the glass plate structure 11 is not excessively long over the entire surface of the vibration region A2, and the vibration The vibration from the output section 13 is propagated to the vibration region A2 with sufficient strength.
• the glass plate structure 11 has an excitation area A1 where the vibration output unit 13 is attached and is placed in the internal space 19 of the enclosure member 15, and a vibrating area A1 which is placed outside the internal space 19.
• the vibration region A2 that is caused by the vibration and contributes to acoustic radiation is separated by the shielding member 17. Therefore, the sound generated from the vibration region A1 due to the vibration from the vibration output section 13 is attenuated within the internal space 19. Further, the opening 21 of the internal space 19 is acoustically shielded from the glass plate structure 11 by the shielding member 17, so that the sound generated within the internal space 19 from the excitation area A1 is This prevents leakage to the outside of 19.
• one continuous glass plate structure 11 is divided into a vibrating area A1 and a vibrating area A2, and the vibrating area A1 is defined in the internal space 19 by the enclosing member 15 and the shielding member 17. .
• the noise generated from the excitation area A1 is confined in the internal space 19, sound leakage from the internal space 19 is suppressed, and unnecessary noise generated from the excitation area A1 due to the vibration of the vibration output section 13 is prevented from air propagation. Suppresses the transmission of sound to the receiver. As a result, it is possible to suppress a decrease in directivity due to sound looping around. Moreover, since the sound is radiated to the surroundings only from the vibration area A2 of the glass plate structure 11, the sound pressure distribution due to the sound radiation can be made uniform.
• the area ratio Ss/Sv is preferably 0.01 or more and 1.0 or less, and 0.02 Above, 0.5 or less is more preferable, and 0.05 or more and 0.1 or less are even more preferable. If the area of the vibration area A1 is too wide compared to the area of the vibration area A2, the efficiency of generating sound pressure will decrease, and if it is too narrow, there is a risk that efficient vibration drive may not be possible. Therefore, by setting the area ratio within the above range, sound radiation from the vibration region A2 according to the vibration of the vibration output section 13 can be performed with high efficiency.
• the total area of the glass plate structure 11 (the area of one main surface of the glass plate) is preferably 0.04 m 2 or more, more preferably 0.10 m 2 or more, and even more preferably 0.30 m 2 or more.
• FIG. 6 is a functional block diagram of the vibration device applied to the vehicle S.
• the control section 5 includes a transfer function correction section 31, an adaptive algorithm 33, an adaptive filter 35, and an amplifier 37.
• the control unit 5 is composed of a microcomputer including a processor such as a CPU, a memory such as a ROM and a RAM, a storage, and the like.
• the adaptive algorithm 33 and the adaptive filter 35 generate a correction signal by correcting the acoustic signal transmitted from the sound output device 1.
• the adaptive algorithm 33 and the adaptive filter 35 generate a correction signal that corrects the acoustic signal so that the detection signal transmitted from the indoor sound detection unit 3 corresponds to the acoustic signal.
• the correction signal generated by the adaptive algorithm 33 and the adaptive filter 35 is amplified by the amplifier 37 and transmitted to the vibration output section 13.
• the adaptive algorithm 33 estimates the error between the detection signal and the acoustic signal using, for example, the least squares method.
• the filter coefficients are appropriately updated by the adaptive algorithm 33 according to the level of error between the detection signal and the acoustic signal.
• the transfer function correction unit 31 calculates a transfer function of a secondary path, which is a transmission path of an acoustic signal between the glass plate structure 11 to which the vibration output unit 13, which is a secondary sound source, is attached, and the room sound detection unit 3. . Based on this transfer function, the transfer function correction unit 31 sets the parameters of the adaptive algorithm 33 so that the phase of the detection signal from the room sound detection unit 3 is synchronized with the phase of the acoustic signal from the sound output device 1. do.
• an arbitrary acoustic signal is transmitted to the control unit 5 by the sound output device 1 by operating the vibration device. Further, indoor sound is detected by the indoor sound detection section 3, and the detection result is transmitted to the control section 5 as a detection signal.
• the transfer function correction unit 31 of the control unit 5 calculates a transfer function in the acoustic signal transmission path between the sound output device 1 and the room sound detection unit 3. Based on this transfer function, the phase of the detection signal from the room sound detection section 3 is synchronized with the phase of the acoustic signal from the sound output device 1.
• the glass plate structure 11 has a large mass (inertia), as shown in FIG. 7A, the reproducibility of the input signal is low at the rise of the signal input and immediately after cut-off.
• FIG. 7A an example in which the output input signal waveform (broken line) corresponding to the detection signal of the room sound detection unit 3 is delayed compared to the waveform (solid line) faithful to the input signal of the vibration device corresponding to the acoustic signal It shows.
• the adaptive algorithm 33 and the adaptive filter 35 of the control unit 5 generate a correction signal that corrects the acoustic signal so that the detection signal transmitted from the indoor sound detection unit 3 corresponds to the acoustic signal. .
• a correction signal is generated so that the reproducibility of the input signal at the rise of the signal input and immediately after cutoff is increased.
• FIG. 7B shows an example of the waveform of the correction signal (solid line) and the output input signal waveform (broken line) similar to the input signal of the vibration device.
• This correction signal is sent to the amplifier 37, amplified by the amplifier 37, and sent to the vibration output section 13.
• a voltage feedback amplifier or a current feedback amplifier can be used as the amplifier 37, it is preferable to use a current feedback amplifier because good responsiveness can be obtained.
• the adaptive filter 35 is configured to be a controller in which a feedforward controller Gff(s) and a feedback controller Gfb(s) are connected in series, as shown in FIG. 8A. More specifically, the target value r(s), which is an acoustic signal, is input to the feedforward controller Gff(s), and the output of the feedforward controller Gff(s) and the detection signal of the room sound detector 3 are used as input. The deviation (s) from a certain output y(s) (measurement signal) is input to the feedback controller Gfb(s). The control input u(s), which is the output of the feedback controller Gfb(s), is output to the controlled object P(s), which is the vibration output unit 13.
• the adaptive filter 35 may be configured to be a controller in which a feedforward controller Gff(s) and a feedback controller Gfb(s) are connected in parallel, as shown in FIG. 8B. good. More specifically, the target value r(s) which is an acoustic signal is input to the feedforward controller Gff(s), and the target value r(s) which is an acoustic signal and the detection signal of the room sound detection unit 3 are used as input. The deviation (s) from a certain output y(s) (measurement signal) is input to the feedback controller Gfb(s). Then, a control input u(s), which is the sum of the output of the feedback controller Gfb(s) and the output of the feedforward controller Gff(s), is output to the controlled object P(s), which is the vibration output unit 13.
• the vibration output unit 13 vibrates the glass plate structure 11 to which the vibration output unit 13 is attached by generating vibration according to the transmitted correction signal. Therefore, the vibration generated in the glass plate structure 11 by the vibration output unit 13 enables the output of sound faithful to the acoustic signal.
• FIG. 9 is a schematic configuration diagram of a door D of a vehicle S equipped with a vibration device having another configuration.
• this vibration device includes a microphone for internal space sound detection in an internal space 19 of an enclosure member 15 that surrounds an excitation area A1 of a glass plate structure 11 to which a vibration output unit 13 is attached. 8. Further, an auxiliary speaker 9 is provided in the internal space 19 .
• the interior space sound detection section 8 and the auxiliary speaker 9 are each connected to the control section 5.
• the internal space sound detection section 8 detects the vibration sound from the vibration region A1 of the glass plate structure 11 caused by the vibration of the vibration output section 13, and transmits this to the control section 5 as an error signal.
• the control unit 5 causes the adaptive algorithm 33 and the adaptive filter 35 to generate a cancellation signal for minimizing the error signal from the internal spatial sound detecting unit 8 according to the error signal from the internal spatial sound detecting unit 8, and A cancellation sound is output to the speaker 9. Then, by outputting the canceling sound from the auxiliary speaker 9, the vibration sound from the excitation area A1 of the glass plate structure 11 caused by the vibration of the vibration output section 13 in the internal space 19 is canceled.
• the glass plate structure 11 is vibrated by the vibration output unit 13 to output a sound that is faithful to the acoustic signal, and the vibration caused by the vibration of the vibration output unit 13 is output. It is possible to cancel out the secondary noise generated by the noise. Thereby, more faithful sound can be outputted from the acoustic signal in the interior of the vehicle S.
• the auxiliary speaker 9 that outputs a canceling sound is provided in the internal space 19, but the output form of the canceling sound is not limited to this.
• a configuration may be adopted in which the vibration output unit 13 outputs a canceling sound that cancels the sound generated due to the vibration of the vibration output unit 13, or a configuration in which the auxiliary speaker 9 and the vibration output unit 13 are used together may be adopted. .
• a sound absorbing material such as felt or sponge may be attached to the inside or outside of the enclosure member 15. In that case, the silencing effect within the interior space 19 is enhanced.
• a porous type sound absorbing material or a resonant type sound absorbing material such as a perforated board is preferable, and a porous type sound absorbing material is more preferable from the viewpoint of the frequency band in which sound can be absorbed.
• 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, 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 enclosure member 15.
• FIG. 10 is a functional block diagram of another configuration example of the vibration device. Compared to the configuration example shown in FIG. 6 above, an acceleration sensor 53 installed on the surface of the glass plate structure 11 is used instead of the room sound detection section 3. In this configuration example, similarly to the indoor sound detection section 3, the output of the acceleration sensor 53 is transmitted to the control section 5 as a detection signal.
• the vibration device 11 and 12 are functional block diagrams of still other configuration examples of the vibration device.
• the responsiveness of the glass plate structure 11 changes depending on the temperature. This is because the vibration damping characteristics (loss coefficient) of the glass plate of the glass plate structure 11 and the intermediate layer (adhesive layer or fluid layer described later) in the case of laminated glass change due to temperature changes. Therefore, in this configuration example, the parameters of the adaptive algorithm 33 are set according to the temperature of the glass plate structure 11 in order to correct performance differences due to temperature changes.
• a temperature sensor 200 installed on the surface of the glass plate structure 11 is used.
• the transfer function correction unit 31 determines a transfer function for each temperature of the glass plate structure 11, and sets the parameters of the adaptive algorithm 33 based on this transfer function.
• the temperature sensor 200 may also be installed on a surface other than the surface of the glass plate structure 11.
• a temperature sensor may be installed in direct contact with the intermediate layer. It is also possible to use an outside temperature meter installed inside the front grill or a room temperature meter installed inside the vehicle. In this case, the temperature of the intermediate layer of the glass plate structure may be estimated by referring to data from a plurality of temperature sensors.
• the adaptive algorithm 33 and the adaptive filter 35 use the parameters of the adaptive algorithm 33 corresponding to the temperature detected by the temperature sensor 200 to generate a correction signal that corrects the acoustic signal transmitted from the sound output device 1.
• FIG. 13 is a schematic diagram of a vibration device provided on a door D of a vehicle S.
• the vibration device includes a glass plate structure 11 , a vibration output section 13 attached to the glass plate structure 11 , and a temperature control section 330 that adjusts the temperature of the glass plate structure 11 .
• FIG. 14 is a schematic cross-sectional view taken along line III-III shown in FIG. 13.
• the enclosing member 15 has an opening 21 from which the glass plate structure 11 protrudes.
• At least one vibration output section 13 is attached to the glass plate structure 11 .
• the temperature control unit 330 includes a heating body that adjusts the temperature of the intermediate layer of the glass plate structure 11 or a structure that has a heat retention function.
• the temperature control section 330 may be provided on one side of the glass plate structure 11 as shown in FIG. 14, or may be provided on both sides.
• the temperature control unit 330 heats, cools, keeps warm, etc. the intermediate layer in response to a command signal from the control unit 315 based on the temperature of the glass plate structure 11, surrounding members, or the environment detected by a sensor unit (not shown).
• a configuration that performs the following may also be used.
• the enclosing member 15 is formed in a box shape surrounding a portion of the glass plate structure 11 where the vibration output section 13 and the temperature control section 330 are arranged.
• a shielding member 17 is provided in the opening 21 of the enclosing member 15 .
• the shielding member 17 makes the internal space 19 of the enclosure member 15 a closed space, and acoustically shields the space between the opening 21 and the glass plate structure 11. Further, the glass plate structure 11 is divided into a vibration region A1 inside the internal space 19 in which the vibration output section 13 is provided, and a vibration region A2 outside the internal space 19.
• the vibration region A1 can be said to be the region of the plate surface of the glass plate structure 11 excluding the portion exposed to the outside from the internal space 19 of the enclosure member 15. That is, the enclosing member 15 exposes one end of the glass plate structure 11 to the outside of the internal space 19 through the opening 21 of the internal space 19 .
• one end of the glass plate structure 11 refers to the end of the glass plate structure 11 on the side closer to the fixed position of the vibration output section 13 and the temperature control section 330, and the end of the glass plate structure 11 on the far side. means the farthest end.
• the acoustic signal output by the sound output device 1 is transmitted to the control section 315.
• FIG. 15 is a functional block diagram of the vibration device applied to the vehicle S. Control of the vibration device will be explained based on FIG. 15.
• the control unit 315 is composed of a microcomputer including a processor such as a CPU, a memory such as a ROM and a RAM, and a storage.
• the sound output device 1 transmits an acoustic signal to the control unit 315. Further, the indoor sound detection unit 3 detects indoor sound, and the detection result of the indoor sound is transmitted to the control unit 315 as a detection signal.
• the control unit 315 includes a transfer function correction unit 31, an adaptive algorithm 33, an adaptive filter 35, and an amplifier 37, similar to the control unit 5 of the first embodiment.
• the control section 315 further controls the temperature adjustment section 330.
• FIG. 16 is a schematic cross-sectional view showing the structure of the glass plate structure 11. As shown in FIG.
• a first glass plate 73 and a second glass plate 75 are arranged facing each other, and an intermediate layer 71 is provided between the first glass plate 73 and the second glass plate 75.
• the description will be made assuming that the first glass plate 73 is disposed on the indoor side of the vehicle S, and the second glass plate 75 is disposed on the outdoor side.
• the first glass plate 73 and the second glass plate 75 will also be referred to as a pair of glass plates 73 and 75.
• the intermediate layer 71 of the glass plate structure 11 prevents the glass plate structure 11 from resonating when the glass plate structure 11 resonates due to the drive of the vibration output unit 13, or suppresses the resonance of the glass plate structure 11. Attenuates shaking. Due to the presence of the intermediate layer 71, the glass plate structure 11 can have a higher loss factor compared to a case where the glass plate structure 11 is composed only of the glass plate structure 11.
• the glass plate structure 11 is preferable because the larger the loss coefficient, the greater the vibration damping.
• the loss coefficient of the glass plate structure 11 at 25°C is preferably 1 ⁇ 10 ⁇ 3 or more, and 2 ⁇ 10 ⁇ 3 or more. More preferably, it is 5 ⁇ 10 ⁇ 3 or more.
• the longitudinal wave sound velocity value in the thickness direction of the glass plate structure 11 should be 4.0 ⁇ 10 3 m/s or more because the faster the sound velocity is, the better the reproducibility of high-frequency sound is when used as a diaphragm. It is preferably 4.5 ⁇ 10 3 m/s or more, more preferably 5.0 ⁇ 10 3 m/s or more.
• the upper limit is not particularly limited, but is preferably 7.0 ⁇ 10 3 m/s or less.
• the glass plate structure 11 Since the glass plate structure 11 has the intermediate layer 71, the glass plate structure 11 obtains a high loss coefficient and a high longitudinal sound velocity value. Note that a large loss coefficient means a large vibration damping ability.
• the loss coefficient is calculated using the half width method.
• the frequency width of the point at which the resonance frequency f and amplitude h of the material is -3 dB lower than the peak value, that is, the maximum amplitude -3 [dB] is W
• the value expressed as ⁇ W/f ⁇ is It is defined as loss factor.
• suppressing resonance means increasing the frequency width W relative to the amplitude h and making the peak broad.
• the loss coefficient is a value specific to the material, and in the case of single glass, for example, it differs depending on its composition, relative density, etc. Note that the loss coefficient can be measured by a dynamic elastic modulus test method such as a resonance method.
• the longitudinal wave sound velocity value refers to the speed at which longitudinal waves propagate in the diaphragm.
• the longitudinal sound velocity value and Young's modulus can be measured by the ultrasonic pulse method described in Japanese Industrial Standards (JIS-R1602-1995).
• FIG. 17 is a schematic cross-sectional view of a glass diaphragm showing another arrangement example of the temperature control section shown in FIG. 16.
• the temperature control section 330 may be provided between the first glass plate 73 and the intermediate layer 71, as shown in FIG. 16, or may be provided outside the first glass plate 73, as shown in FIG. , may be provided on the outside of each of the first glass plate 73 and the second glass plate 75. Further, the temperature control section 330 may be provided in the vibration region A1, in both the vibration region A1 and the vibration region A2, or only in the vibration region A2.
• FIGS. 18A to 18D are explanatory diagrams showing the temperature control region F by the temperature control section 330 disposed in the glass plate structure 11.
• the region (temperature control region F) in which the temperature control section 330 is arranged is indicated by diagonal lines, and the position in which the shielding member 17 is arranged in the opening 21 of the enclosure member 15 is shown as the belt line BL.
• the belt line BL corresponds to the lower side of the opening area (vibration area A2) when the side window is attached to the door D of the vehicle S and is in a fully closed state. .
• the temperature control region F is provided below the belt line BL, that is, in the internal space 19 of the enclosure member 15 (see FIG. 14). That is, the temperature control region F is provided only in the non-exposed portion of the glass plate structure 11.
• the temperature control section 330 is arranged in the vibration region A1, the vibration characteristics of the glass plate structure 11 can be reliably improved.
• the temperature control section 330 is housed in a portion that is not exposed to the outside, it is not visible to the user, resulting in a good design.
• the temperature control section 330 is protected from exposure to environmental atmosphere such as ultraviolet rays and heat rays from sunlight, wind and rain, and so on. This suppresses deterioration of the temperature control section 330 over time.
• the temperature control region F is provided only around the vibration output section 13 below the belt line BL. In this case, the temperature control region F can be kept to the necessary minimum, and the installation cost of the temperature control section 330 can be reduced.
• the temperature control area F is provided in both the vibration area A1 and the vibration area A2 of the glass plate structure 11. In this case, the entire glass plate structure 11 can be maintained at an appropriate temperature and good vibration characteristics can be maintained.
• the temperature control region F is provided only in the exposed portion of the glass plate structure 11 above the belt line BL. In this case, the vibration characteristics of the vibration region A2 become good. As described above, the temperature control region F can be selected as appropriate depending on the purpose of use, performance, sound insulation, etc.
• Examples of the temperature control section 330 include a heating body, a material or structure having a heat retention function, and the like.
• the intermediate layer 71 is heated using a heating body such as a hot wire, a conductive film, or an electronic device, and in the case of keeping warm, the intermediate layer 71 is made to follow the temperature inside the vehicle.
• an electronic cooling element such as a Peltier element can be used. When using a Peltier element, heating and cooling can be selectively controlled, expanding the temperature adjustment range.
• the heating body examples include a conductive wire, a transparent conductive film (ITO), a film heater, and the like.
• the conductive wire is a hot wire heater and can be installed in each region such as the entire surface of the glass plate or only in the vibration region A1 below the belt line BL.
• Both the transparent conductive film and the film heater are surface heaters that have a heating surface, and can be installed in each area similar to the case of the conductive wire, and can efficiently heat a wide area.
• the Peltier element can be arranged only in the vibration region A1 below the belt line BL. Furthermore, by providing heating bodies on both sides of the glass diaphragm, the responsiveness of temperature adjustment can be improved.
• FIG. 19 is a partial cross-sectional view showing a structure in which a heat ray reflective layer is provided on a glass diaphragm.
• the glass plate structure 11 shown in FIG. 19 includes a heat ray reflective layer 45 between the intermediate layer 71 and the second glass plate 75.
• the heat ray reflective layer 45 plays a role of suppressing the heat input Q1 introduced from the indoor side through the first glass plate 73 and the intermediate layer 71 from escaping to the outdoor side and returning it to the indoor side as reflected heat Q2. .
• the heat ray reflective layer 45 can be formed by depositing a material such as an ITO film or an FTO film, for example.
• the heat ray reflective layer 45 functions as a heat insulating layer that suppresses the heat input Q1 introduced into the intermediate layer 71 from escaping to the outdoor side.
• a heat insulating layer is an air layer.
• the heat insulating layer such as the heat ray reflective layer 45 serves as the temperature control section 330 that adjusts the temperature of the intermediate layer 71 using the ambient temperature on the indoor side.
• FIG. 20 is a partial cross-sectional view showing a configuration in which one glass plate of the glass diaphragm is made thinner than the other glass plate.
• the thickness t in of the first glass plate 73 on the indoor side is thinner than the plate thickness t out of the second glass plate 75 on the outdoor side (t in ⁇ t out ).
• the coefficient ⁇ can be set in the range of 0.0 ⁇ 1.0, preferably 0.2 ⁇ 0.8, and 0.5 ⁇ 0. 7 is more preferred.
• the temperature of the intermediate layer 71 can follow the temperature on the indoor side of the vehicle S in a short time.
• the intermediate layer 71 is heated using the amount of heat Q of the indoor temperature higher than the outside temperature, and when the outside temperature is high, the intermediate layer 71 can be brought close to the indoor temperature lower than the outside temperature. In other words, the intermediate layer 71 becomes more susceptible to the influence of indoor temperature.
• the combination of the first glass plate 73 and the second glass plate 75 having the optimized plate thickness configuration functions as the temperature control section 330.
• FIG. 21 is a sectional view showing another example of the structure of the glass diaphragm.
• the glass plate structure 11 shown in FIG. 21 includes a layer of the above-mentioned temperature control section 330 on the inner surface of the first glass plate 73, and a resin between the layer of the temperature control section 330 and the second glass plate 75.
• a layer 47 is provided, and a fluid layer 44 such as a gel-like material or a liquid phase (for example, liquid crystal) is provided between the resin layers 47 .
• the pair of resin layers 47 can be composed of resin films that seal the fluid layer 44 .
• This fluid layer 44 and the pair of resin layers 47 constitute an intermediate layer 49.
• the resin film has a reduced vibration damping property at low temperatures, making resonance more likely to occur. Furthermore, when the temperature rises above room temperature (for example, above 40° C.), the damping characteristics improve. Therefore, this glass plate structure 11 is also provided with the temperature control section 330, thereby increasing the damping property of the resin layer 47, and making it possible to excite the glass plate structure 11 efficiently.
• FIG. 22 is a plan view of a vehicle showing a location where the glass plate structure 11 is applied to the vehicle.
• the glass plate structure 11 may be provided in the rear side window RSW, windshield WS, rear window RW, roof glazing RG, etc. in addition to the front side window FSW.
• an example was shown in which a part of the front side window FSW is enclosed by the enclosure member 15, but when the other window glass of the front side window FSW is used as a glass diaphragm, the enclosure member 15 is May or may not be present.
• the vibration output unit 13 such as an exciter is arranged on the main surface of the vehicle interior near the vehicle roof so as to overlap with a shielding layer such as black ceramics that shields visible light. This can improve visibility from the outside.
• a shielding layer such as black ceramics that shields visible light.
• the vibration output unit 13 when the vibration output unit 13 is arranged near the vehicle roof of the rear window RW, one unit (two units in total) may be provided at each end in the vehicle width direction along the boundary line between the rear window RW and the vehicle roof. good.
• the vibration output section 13 may be attached to the inside of the vehicle, and an enclosure member 15 may be further provided to cover the vibration output section 13 and surround it so as to define an interior space.
• each of the embodiments described above is an example of the slidable glass plate structure 11 of a vehicle, and is not limited to the front side window FSW or the rear side window RSW, but is fixed to the vehicle (so-called fitting). It can also be applied to fixed windows such as rear window RW.
• a vibration device is configured by these glass plate components 11, the sound output device 1, the room sound detection section 3, and the control section 315 shown in FIG.
• the application of the glass plate structure 11 to the vehicle S is not limited to acoustic output, but also vehicle windows that have improved water repellency, water sliding properties, snow accretion resistance, ice accumulation resistance, and stain resistance by sonic vibration. It may also be used as a structural member or decorative board. Specifically, it can be used as automobile window glasses, mirrors, flat or curved plate members mounted inside cars, as well as lenses, sensors, and cover glasses thereof. It can also be used as an external speaker for the purpose of emitting sound to the outside of the vehicle.
• the vibration device can be applied to railway vehicles, and in addition to the vehicle S, it can also be applied to, for example, windows of aircraft, windows of ships, etc., and windows of buildings such as houses.
• FIG. 23 is a schematic diagram showing an example in which the glass plate structure 11 is applied to a window of a house.
• a window WD of a house is provided with a glass plate structure 11 and a window frame WF that supports the glass plate structure 11.
• a vibration output unit 13 is attached to a portion of the surface of the glass plate structure 11 that is arranged in the internal space of the window frame WF.
• the vibration output section 13 may be one or more.
• a temperature control section 330 is attached to at least a portion of the glass plate structure 11.
• the temperature control unit 330 is preferably provided in the internal space of the window frame WF as shown in FIG. 18(A), but the temperature control unit 330 is The area F may be changed as appropriate.
• the vibration output unit 13 can vibrate the glass plate structure 11 whose temperature has been controlled by the temperature control unit 330, and the acoustic signal can be It can output faithful sound.
• the glass plate structure 11 can also be provided with functions such as IR cut, UV cut, and coloring. This allows a configuration with enhanced functionality depending on the application.
• the internal space 19 provided in the enclosure member 15 may be provided, for example, in other parts of the vehicle body, in addition to the door panel of the vehicle, and in the case of architectural members, it may be provided in a sash member, a wall, etc. .
• the vibrating device described above can be used not only for moving bodies such as vehicles and windows of buildings, but also for members for electronic devices.
• components for electronic devices there are full-range speakers, speakers for bass reproduction in the 15Hz to 200Hz band, speakers for high frequency reproduction in the 10kHz to 100kHz band, large speakers with a diaphragm area of 0.2m2 or more, flat speakers, and cylindrical speakers.
• It can be used in transparent speakers, cover glasses for electronic devices that function as speakers, cover glasses for TV displays, screen films, displays in which video and audio signals are generated from the same surface, electronic displays, lighting equipment, and the like.
• the speaker may be for music, alarm sound, etc.
• a vibration detection element such as an acceleration sensor is added, it can be used as a diaphragm for a microphone or a vibration sensor.
• the glass plate structure 11 used for the glass plate structure 11 means inorganic glass and organic glass.
• the organic glass include PMMA resin, PC resin, PS resin, PET resin, and cellulose resin, which are generally well known as transparent resins.
• other glass plates may be laminated.
• Other glass plates may be the above-mentioned inorganic glass or organic glass, and instead of the glass plate, a resin plate made of a resin other than organic glass, a metal plate such as aluminum, a ceramic plate made of ceramic, etc. can be used.
• materials for metal plates that can be used in place of other glass plates include aluminum, magnesium, copper, silver, gold, iron, titanium, SUS, etc. Other alloy materials can be used as necessary. Good too.
• a physically strengthened glass plate or a chemically strengthened glass plate can also be used for at least one of the glass plates constituting the glass plate structure 11. This is useful to prevent glass panes from breaking. If you want to increase the strength of the glass plate, it is best to use a physically strengthened glass plate or a chemically strengthened glass plate for the topmost glass plate among the multiple glass plates, and all of the glass plates that make up the vibrating device should be physically strengthened. A glass plate or a chemically strengthened glass plate is preferable.
• crystallized glass or phase-divided glass as the glass plate from the standpoint of increasing the longitudinal sound velocity value and strength.
• the outermost glass plate among the plurality of glass plates be made of crystallized glass or phase splitting glass.
• the resin material constituting the glass plate is preferably a resin material that can be molded into a flat plate shape or a curved plate shape. Further, as the composite material or fiber material, a resin material composited with a high hardness filler, carbon fiber, Kevlar fiber, etc. are preferable.
• the composition of the glass plate is not particularly limited, the following range is preferable, for example.
• SiO 2 40-80% by mass, Al 2 O 3 : 0-35% by mass, B 2 O 3 : 0-15% by mass, MgO: 0-20% by mass, CaO: 0-20% by mass, SrO: 0 ⁇ 20% by mass, BaO: 0-20% by mass, Li 2 O: 0-20% by mass, Na 2 O: 0-25% by mass, K 2 O: 0-20% by mass, TiO 2 : 0-10% by mass %, and ZrO 2 :0 to 10% by mass.
• the above composition accounts for 95% by mass or more of the entire glass.
• the composition of the glass plate expressed in mol% based on oxides is more preferably in the following range. SiO 2 : 55-75% by mass, Al 2 O 3 : 0-25% by mass, B 2 O 3 : 0-12% by mass, MgO: 0-20% by mass, CaO: 0-20% by mass, SrO: 0 -20% by mass, BaO: 0-20% by mass, Li 2 O: 0-20% by mass, Na 2 O: 0-25% by mass, K 2 O: 0-15% by mass, TiO 2 : 0-5% by mass %, and ZrO 2 :0 to 5% by mass.
• the above composition accounts for 95% by mass or more of the entire glass.
• the intermediate layer 71 between the plurality of glass plate structures 11 stacked on each other is preferably a solid phase, but as described above, a liquid such as a gel-like material or a liquid such as liquid crystal may be formed between the pair of resin layers. It may be a fluid layer made of fluid.
• solid phase intermediate layer examples include polyvinyl butyral (PVB), ethylene vinyl acetate copolymer resin (EVA), polyurethane, polyethylene terephthalate, polycarbonate, etc., which are suitably used as an interlayer film for laminated glass.
• PVB polyvinyl butyral
• EVA ethylene vinyl acetate copolymer resin
• polyurethane polyethylene terephthalate
• polycarbonate etc.
• the thickness of the intermediate layer 71 does not need to be uniform, and may have a thickness distribution so that the sound pressure frequency characteristics of the glass plate structure 11 are optimized.
• the intermediate layer 71 may have a wedge shape in which the thickness gradually increases in a certain direction.
• the temperature control section 330 controls the intermediate layers 71 and 49 to be at least the glass transition temperature of the resin material and at most 50 degrees Celsius, preferably at most 45 degrees Celsius, and more preferably at most 40 degrees Celsius.
• a plate structure 11 can be realized.
• the glass plate structure 11 may be provided with a fluid layer containing liquid in an intermediate layer between at least one pair of glass plate structures 11, and in this case, a high loss coefficient can be achieved. Among these, the loss coefficient can be further increased by controlling the viscosity and surface tension of the fluid layer within suitable ranges. This is different from the case where the pair of glass plate structures 11 are provided via an adhesive layer, and the pair of glass plate structures 11 do not stick together and continue to maintain the vibration characteristics as each glass plate structure 11. This is thought to be due to.
• “fluid” as used herein refers to fluidity containing liquid, such as liquid, semi-solid, liquid crystal, mixture of solid powder and liquid, solid gel (jelly-like substance) impregnated with liquid, etc. The meaning includes all those that have the following.
• the fluid layer preferably has a viscosity coefficient of 1 ⁇ 10 ⁇ 4 to 1 ⁇ 10 3 Pa ⁇ s at 25° C., and a surface tension of 15 to 80 mN/m at 25° C. If the viscosity is too low, it becomes difficult to transmit vibrations, and if the viscosity is too high, the pair of glass plate structures 11 located on both sides of the fluid layer will stick together and exhibit vibration behavior as a single glass plate structure 11. As a result, resonant vibrations are less likely to be damped. Furthermore, if the surface tension is too low, the adhesion between the glass plate structures 11 will decrease, making it difficult to transmit vibrations. If the surface tension is too high, the pair of glass plate structures 11 located on both sides of the fluid layer tend to stick to each other and exhibit vibrational behavior as a single glass plate structure 11, resulting in resonance vibration. is less likely to be attenuated.
• the fluid layer is chemically stable and that the fluid layer and the pair of glass plate structures 11 located on both sides of the fluid layer do not react.
• Chemically stable means, for example, something that undergoes little alteration (deterioration) when exposed to light, or something that does not solidify, vaporize, decompose, change color, or chemically react with glass at least in the temperature range of -20 to 70°C. do.
• components of the fluid layer include water, oil, organic solvents, liquid polymers, ionic liquids, and mixtures thereof. More specifically, propylene glycol, dipropylene glycol, tripropylene glycol, straight silicone oil (dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil), modified silicone oil, acrylic acid polymer, liquid polybutadiene, glycerin. Examples include paste, fluorine solvent, fluororesin, acetone, ethanol, xylene, toluene, water, mineral oil, and mixtures thereof.
• propylene glycol dimethyl silicone oil, methylphenyl silicone oil, methyl hydrogen silicone oil, and modified silicone oil
• propylene glycol or silicone oil is the main component. More preferred.
• the technology of the present disclosure is not limited to the above-described embodiments, and can be modified and applied by those skilled in the art by combining the configurations of the embodiments with each other, based on the description of the specification, and well-known technology. This is also contemplated by the technology of the present disclosure, and is included in the scope for which protection is sought.
• a glass plate structure comprising at least one glass plate; a vibration output unit fixed to the glass plate structure and vibrating the glass plate structure according to an input signal; a detection unit that detects sound or vibration emitted by the glass plate structure and outputs a detection signal according to the detection result; a signal output section that outputs an arbitrary acoustic signal; a control unit that includes a controller that generates a correction signal that corrects the acoustic signal so that the detection signal and the acoustic signal correspond, and inputs the correction signal from the controller to the vibration output unit;
• a vibration device comprising: According to this vibrating device, a correction signal is generated by correcting an acoustic signal so that a detection signal according to the detection result corresponds to an arbitrary acoustic signal by detecting the sound or vibration emitted by the glass plate structure, and By inputting it to the vibration output section that vibrates the plate structure, it is possible to output sound that is faithful to the acous
• the control unit includes: having a control parameter of the controller for each temperature of the glass plate structure, The vibration device according to (1), wherein the controller generates the correction signal using a control parameter of the controller that corresponds to the temperature of the glass plate structure detected by the temperature detector. According to this vibrating device, even if the temperature of the glass plate structure changes, it is possible to output sound faithful to the acoustic signal.
• the control unit generates the correction signal using an adaptive algorithm and an adaptive filter, (1) or (2) wherein the adaptive filter uses a target value of the acoustic signal as an input to a feedforward controller, and uses a deviation between an output of the feedforward controller and the detection signal as an input to a feedback controller.
• the vibration device described in According to this vibration device, a feedforward controller and a feedback controller are used to make it possible to output sound faithful to an acoustic signal.
• the control unit generates the correction signal using an adaptive algorithm and an adaptive filter
• the adaptive filter uses a target value of the acoustic signal as an input to a feedforward controller, and uses a deviation between the acoustic signal and the detection signal as an input to a feedback controller
• the vibration device according to (1) or (2), wherein the sum of the output of the feedback controller and the output of the feedforward controller is output to the vibration output section. According to this vibration device, a feedforward controller and a feedback controller are used to make it possible to output sound faithful to an acoustic signal.
• An internal space is defined in which the vibration output section fixed to the glass plate structure is surrounded, and a part of the glass plate structure is exposed to the outside of the internal space through an opening of the internal space.
• the vibrating device according to any one of (1) to (4), further comprising an enclosing member. According to this vibration device, the vibration output section fixed to the glass plate structure is arranged inside the internal space defined by the enclosing member. This makes it possible to suppress noise leakage from the internal space.
• the vibrating device according to any one of (1) to (6), wherein the glass plate structure includes a temperature control section that adjusts the temperature.
• the influence of temperature on the damping properties and frequency characteristics of the glass plate structure can be reduced, and the glass plate structure is not required. It can vibrate stably due to its vibration characteristics.
• An internal space is defined in which the vibration output unit fixed to the glass plate structure is surrounded, and a part of the glass plate structure is exposed to the outside of the internal space through an opening of the internal space. further comprising an enclosing member,
• the glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate,
• the glass plate structure is a laminated glass having a first glass plate, a second glass plate, and an intermediate layer sandwiched between the first glass plate and the second glass plate,
• the vibrating device according to any one of (7) to (10), wherein the temperature control section has a function of keeping the intermediate layer warm. According to this vibrator, the temperature of the intermediate layer can be adjusted by keeping the temperature controlled by the temperature control section. Also, the temperature can be adjusted using the indoor temperature.
• the temperature control section includes a heat insulating layer that covers at least a portion of the intermediate layer. According to this vibrating device, the heat insulating layer suppresses heat discharge and suppresses a temperature drop.
• the temperature control section increases heat input to the intermediate layer by making one of the first glass plate and the second glass plate thinner than the other. vibration device. According to this vibrating device, heat absorption by the thin glass plate is suppressed, and heat input to the intermediate layer through the thin glass plate is increased. Thereby, heat can be taken into the intermediate layer without waste.
• the temperature adjustment section accurately adjusts the temperature of the intermediate layer made of a resin material whose frequency characteristics are highly dependent on temperature.
• a vibration method in which a glass plate structure including at least one glass plate is vibrated by a vibration output unit fixed to the glass plate structure according to an input signal, Detecting sound or vibration emitted by the glass plate structure and outputting a detection signal according to the detection result, Output any acoustic signal, a controller that generates a correction signal that corrects the acoustic signal so that the detection signal and the acoustic signal correspond, and inputs the correction signal from the controller to the vibration output section; A vibrating method, wherein the glass plate structure is vibrated by the vibration output section according to the correction signal.
• the sound or vibration emitted by the glass plate component is detected, and a correction signal is generated by correcting the acoustic signal so that the detection signal corresponding to the detection result corresponds to an arbitrary acoustic signal, and By inputting it to the vibration output section that vibrates the plate structure, it is possible to output sound that is faithful to the acoustic signal.

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• 2023
  • 2023-05-16 WO PCT/JP2023/018329 patent/WO2023228826A1/ja not_active Ceased
  • 2023-05-16 JP JP2024523066A patent/JPWO2023228826A1/ja active Pending
  • 2023-05-16 CN CN202380042198.7A patent/CN119256353A/zh active Pending
• 2024
  • 2024-11-21 US US18/955,821 patent/US20250088799A1/en active Pending

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