JP2010228641A - Noise reducing device in vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To erase noise without erasing useful voice in a vehicle by a simpler constitution than a conventional system, while performing soundproof construction of a vehicle inside wall by a sound field boundary system. <P>SOLUTION: A vibrating member 20 is arranged in the vicinity of the vehicle inside wall 12 forming the vehicle inside 11. A microphone 40 for external voice is arranged outside the vehicle inside wall, and a microphone for passing voice is arranged inside the vehicle inside wall, respectively. A characteristic of a passing voice signal of collecting a sound by the microphone for the passing voice is added in a signal processing part 50, and a waveform of an opposite phase of an external voice signal of collecting a sound by the microphone for the external voice is generated, and vibration of the vibrating member brought about by the external voice is reduced by imparting vibration of the waveform of the opposite phase to the vibrating member by a piezoelectric vibrating element 30 arranged in the vibrating member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an in-vehicle noise reduction device for reducing noise in a vehicle (inside a vehicle) that a vehicle occupant (driver or passenger) feels when riding. In this specification, a sound wave transmitted by vibration of air or an object or a sound wave felt by human hearing is referred to as a sound or a sound.

  2. Description of the Related Art Conventionally, there are many techniques for reducing noise (for example, engine sound, road noise, wind noise of window glass, etc.) in a vehicle that a passenger of the vehicle feels while riding.

  For example, there is a method of arranging a muffler member (insulator) in order to suppress noise in the vehicle. For example, rubber or sponge-like members with high sound absorption properties are used as the sound deadening member, and by placing such a sound deadening member between the noise source and the space in the vehicle, the noise in the vehicle can be reduced. Figured. In addition to the arrangement of the sound deadening member, there is a method in which the body body itself of the vehicle is made of a highly sound absorbing member, and the body itself is used as a noise filter (passive filter).

  There is also a method for improving the performance of a location that becomes a noise source in a vehicle. For example, to improve the driving efficiency of the engine and tires so as not to emit extraneous sound (ie, noise), or to increase the sealing rate of the space in the vehicle to prevent noise from entering from the outside Thus, noise in the vehicle can be reduced.

  Furthermore, there is a method for reducing noise in the vehicle using ANC (Active Noise Control). For example, in Patent Document 1 below, a microphone and a speaker are installed in a vehicle, and an antiphase sound that cancels the waveform of the noise is output from the speaker so that the noise detected by the microphone is canceled out. The technology is described. In Patent Document 1 described below, by using a filter that reflects the engine speed, it is possible to efficiently eliminate noise having different properties (frequency band, amplitude, etc.) depending on the engine speed. In addition, in the technique disclosed in Patent Document 1, in order to reduce noise particularly in the head of the passenger of the vehicle, a voice near the head of the passenger is detected and noise elimination feedback is performed. It is also considered to adjust the sound image localization filter (head-related transfer function).

JP-A-7-104768

  However, the silencing technique using the ANC disclosed in Patent Document 1 has the following problems.

  First, when ANC is used, there is a problem that only local noise can be canceled out by using an antiphase voice. In other words, since noise in the vehicle enters the passenger's ear via various transmission paths including reflected sound, there is a problem that only local noise reduction can be performed near the passenger's head. .

  Secondly, when ANC is used, there is a problem that it is not desirable to completely cancel the sound in the local frequency band (particularly the audible band). The voice reaching the passengers of the vehicle includes not only noise but also various useful voices (music, voice guidance from a vehicle-mounted navigation device, conversation between passengers, etc.). The sound outside the audible band (or the sound outside the voice band) may be completely canceled, but the sound other than the noise is not erased as much as possible for the audible band sound (or the voice band sound). It is desirable. However, in reality, it is impossible to achieve ideal noise cancellation that leaves only useful speech and only noise, and for audio in the audible band (or voice in the voice band), noise is eliminated to some extent. There is a problem that it is necessary to tolerate the state of remaining. Actually, a noise reduction device using ANC is often used mainly for eliminating a low-frequency band (about 50 Hz to 150 Hz).

  Thirdly, the silencing technique using the ANC disclosed in the above-mentioned Patent Document 1 can reduce the noise in the vehicle by extending the in-vehicle audio system, but for reducing the noise. There is a problem that it is necessary to perform various expansions such as installation of a large number of microphones and speakers, new setting of an internal control device (setting of filter processing for mute), and the like. In addition, the in-vehicle audio system itself is an expensive option, and the user needs to purchase and install an expensive in-vehicle audio system (and an in-vehicle audio system with a mute function that is expected to be expensive). There is. Furthermore, there is a problem that such an in-vehicle audio system with a silencing function cannot be easily replaced.

  In order to solve the above-described problem, the present invention eliminates noise without erasing useful sound in a vehicle with a simpler configuration than that of the conventional method, while performing soundproofing of the vehicle inner wall by the sound field boundary method. An object of the present invention is to realize an in-vehicle noise reduction device for performing the above.

In order to achieve the above object, according to the present invention, there is provided an in-vehicle noise reduction device for reducing noise in a vehicle that a passenger of the vehicle feels while riding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vehicle outside sound collecting means disposed outside the vehicle and collecting external sound outside the vehicle;
An antiphase waveform generating means for generating an antiphase waveform of the external sound collected by the vehicle exterior sound collector;
Vibration means for applying vibration of the waveform of the opposite phase generated by the opposite phase waveform generation means to the vibration member, and reducing vibration of the vibration member caused by the external sound;
An in-vehicle noise reduction device is provided.
With this configuration, while performing soundproof construction of the vehicle inner wall by the sound field boundary method, noise can be eliminated without erasing useful sound in the vehicle by a simpler configuration than the conventional method. It becomes possible.

In order to achieve the above object, according to the present invention, there is provided an in-vehicle noise reduction device for reducing in-vehicle noise felt by a vehicle occupant during boarding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vibration detecting means for detecting vibration of the vibrating member including the influence of external sound;
An anti-phase waveform generating means for generating an anti-phase waveform of the vibration detected by the vibration detecting means;
Vibration means for applying vibration of the reverse phase waveform generated by the reverse phase waveform generation means to the vibration member and reducing vibration detected by the vibration detection means;
An in-vehicle noise reduction device is provided.
With this configuration, while performing soundproof construction of the vehicle inner wall by the sound field boundary method, noise can be eliminated without erasing useful sound in the vehicle by a simpler configuration than the conventional method. It becomes possible.

Furthermore, according to the present invention, in the above configuration, the vehicle further includes a vehicle-side sound collecting unit that is disposed inside the vehicle and collects the external sound that has passed through the vibrating member as passing sound,
There is provided an in-vehicle noise reduction device configured such that the antiphase waveform generating means generates the antiphase waveform so as to erase the passing sound collected by the vehicle interior sound collecting means.
With this configuration, it is possible to eliminate noise in the vehicle with higher accuracy.

In order to achieve the above object, according to the present invention, there is provided an in-vehicle noise reduction device for reducing in-vehicle noise felt by a vehicle occupant during boarding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vehicle-side sound collecting means that is disposed inside the vehicle and collects the external sound that has passed through the vibration member as passing sound;
Anti-phase waveform generating means for generating an anti-phase waveform so as to further erase the characteristics of the passing sound collected by the vehicle interior sound collecting means;
Vibration means for applying vibration of the waveform of the opposite phase generated by the opposite phase waveform generation means to the vibration member and reducing the passing sound collected by the vehicle interior sound collection means;
An in-vehicle noise reduction device is provided.
With this configuration, while performing soundproof construction of the vehicle inner wall by the sound field boundary method, noise can be eliminated without erasing useful sound in the vehicle by a simpler configuration than the conventional method. It becomes possible.

Furthermore, according to the present invention, in the above configuration, when the vibration by the vibration member or the passing sound is transmitted to another vibration member, the waveform of the reverse phase of the vibration given to the other vibration member is calculated and generated. Transmission vibration antiphase waveform generating means
There is provided an in-vehicle noise reduction device configured to give the vibration of the reverse phase waveform generated by the transmission vibration reverse phase waveform generation means to the another vibration member.
With this configuration, it is possible to reduce the noise transmitted to another vibration member by vibrating another vibration member installed at another location.

Furthermore, according to the present invention, in the above configuration, the anti-phase waveform generation means includes an external voice obtained in another in-vehicle noise reducing device, and a vibration member obtained in the another in-vehicle noise reducing device. Based on either the vibration or the passing voice obtained by the other in-vehicle noise reducing device, the waveform of the opposite phase reflecting the influence of the vibration of the vibrating member in the another in-vehicle noise reducing device is generated. A configured in-vehicle noise reduction device is provided.
With this configuration, even when noise that cannot be completely erased by the in-vehicle noise reduction device installed at another location is transmitted to the vibration member, the influence can be reduced.

Furthermore, according to the present invention, there is provided a vehicle interior noise reduction device configured to use the vehicle interior wall as the vibration member in the above configuration.
With this configuration, it is possible to prevent the best friend of noise in the vehicle by vibrating the vehicle inner wall itself.

  The present invention has the above-described configuration and eliminates noise without erasing useful sound in the vehicle with a simpler configuration than the conventional method while performing soundproofing of the vehicle inner wall by the sound field boundary method. Has the effect of being performed. In particular, the present invention realizes soundproofing from the outside and completely eliminates external noise in the vehicle, without depending on the existing in-vehicle audio system (the expansion of the existing in-vehicle audio system is unnecessary). There is no need for installation of an in-vehicle audio system), and noise reduction is realized by a simpler configuration than the conventional method.

It is a figure which shows an example of the vehicle by which the in-vehicle noise reduction apparatus in embodiment of this invention is mounted. It is a figure which shows an example of a structure of the in-vehicle noise reduction apparatus in embodiment of this invention. It is a figure which shows another example of a structure of the in-vehicle noise reduction apparatus in embodiment of this invention.

  Hereinafter, an in-vehicle noise reduction device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a vehicle on which the in-vehicle noise reduction device according to the embodiment of the present invention is mounted. FIG. 1 shows a vehicle 10, a vehicle interior 11, and a vehicle interior wall 12 in which the vehicle interior noise reduction device according to the embodiment of the present invention is mounted. Usually, the vehicle 10 is provided with a seat on which a passenger sits, and the space in which the passenger sits is a space like a sealed room. The vehicle interior 11 represents a space where a passenger sits, and the vehicle interior wall 12 represents a boundary (wall) that partitions the space of the vehicle interior 11.

  Further, the vehicle 10 is provided with a vibration member 20 so as to surround a part or all of the outside of the vehicle interior wall 12 (the outside of the space of the vehicle interior 11). In FIG. 1, the vibration member 20 is installed so as to surround the outside of the vehicle inner wall 12, but the vibration member 20 may be provided inside the vehicle inner wall 12 (in the space of the vehicle interior 11). The vehicle inner wall 12 itself may be used as the vibration member 20. Further, the vibration member 20 may be provided only at a location where noise can be easily transmitted to the vehicle interior 11 (for example, the vehicle interior wall 12 facing the engine room), and an existing silencer member (insulator) is used as the vibration member 20. May be.

  Next, the configuration of the in-vehicle noise reduction device according to the embodiment of the present invention will be described. FIG. 2 is a diagram illustrating an example of the configuration of the in-vehicle noise reduction device according to the embodiment of the present invention. FIG. 2 illustrates the vibration member 20, the piezoelectric vibration element 30, the external sound microphone 40, the transmitted sound microphone 45, and the signal processing unit 50.

  The vibrating member 20 illustrated in FIG. 2 is the same as the vibrating member 20 illustrated in FIG. Therefore, as described above, the vibration member 20 may be provided either inside or outside the space in the vehicle interior 11, or may be the vehicle interior wall 12 itself. The vibration member 20 is made of a material capable of vibration for absorbing external sound.

  In addition, the piezoelectric vibration element 30 is installed at a location where the vibration member 20 can be vibrated. The piezoelectric vibration element 30 is a passive element utilizing the piezoelectric effect, and can convert a voltage applied to the piezoelectric body into a force. In the in-vehicle noise reduction device illustrated in FIG. 2, the vibration member 20 can be vibrated by deforming the piezoelectric body of the piezoelectric vibration element 30 in accordance with the voltage supplied from the signal processing unit 50. . The piezoelectric vibration element 30 can vibrate the vibration member 20 so that the vibration member 20 can absorb external sound. The piezoelectric vibration element 30 can be disposed at any position where the vibration member 20 can be vibrated, and the structure for vibrating the vibration member 20 may be any structure.

  The external audio microphone 40 is a sound collecting device that is disposed in the outer direction of the vehicle inner wall 12 (space in the vehicle interior 11) with the vibration member 20 as a boundary. The external sound microphone 40 has a function of collecting external sound including noise, and the collected external sound is supplied to the signal processing unit 50 as an external sound signal.

  The transmitted sound microphone 45 is a sound collecting device arranged in the inner direction of the vehicle inner wall 12 (the inner direction of the space in the vehicle 11) with the vibration member 20 as a boundary. The transmitted sound microphone 45 has a function of collecting the transmitted sound (sound that actually reaches the passenger in the vehicle 11 as noise) transmitted from the vibration member 20 even when the external sound is reduced by the vibration member 20. The transmitted sound collected and supplied is supplied to the signal processing unit 50 as a transmitted sound signal.

  Note that the accuracy of noise reduction can be improved by installing both the external sound microphone 40 and the transmitted sound microphone 45, but as a result, the vibration of the vibration member 20 is suppressed and the transmitted sound is reduced. If possible, only one of the external audio microphone 40 and the transparent audio microphone 45 may be arranged. In addition, any one of the external sound microphone 40 and the transmitted sound microphone 45 may be a vibration detection device that detects vibration of the vibration member 20.

  Further, the signal processing unit 50 has a function of controlling the vibration in the vibration member 20 based on the external audio signal and the transmitted audio signal, and an analog / digital conversion unit (A / D) 51 for the external audio signal, An analog / digital conversion unit (A / D) 52 for a transmitted sound signal, a vibration adjustment unit 53, an antiphase vibration wave generation unit 54, and a digital / analog conversion unit (A / D) 55 for an antiphase vibration wave. ing.

  The external audio signal analog / digital converter (A / D) 51 converts the external audio signal collected by the external audio microphone 40 from an analog signal to a digital signal and supplies the converted signal to the antiphase vibration wave generator 54. The analog / digital conversion unit (A / D) 52 for the transmitted sound signal converts the transmitted sound signal collected by the transmitted sound microphone 45 from an analog signal to a digital signal and vibrates. It has a function of supplying to the adjustment unit 53.

  Further, the vibration adjusting unit 53 detects the characteristics of the transmitted sound signal by using the transmitted sound signal digitally converted by the analog / digital conversion unit (A / D) 52 for the transmitted sound signal as a teacher signal, and detects an antiphase vibration wave. A function of notifying the generation unit 54 is provided. Note that the vibration adjustment unit 53 may have a learning function so that the tendency of the characteristics of the transmitted audio signal can be grasped.

  Further, the antiphase vibration wave generation unit 54 has characteristics of the external audio signal digitally converted by the analog / digital conversion unit (A / D) 51 for the external audio signal and the transmitted audio signal notified from the vibration adjustment unit 53. And a function of generating a vibration waveform (an anti-phase vibration waveform) for erasing transmitted sound transmitted (leaked) from the vibration member 20 toward the inside of the space in the vehicle interior 11 based on Yes. The vibration waveform generated by the antiphase vibration wave generation unit 54 is converted from a digital signal to an analog signal by the digital / analog conversion unit (A / D) 55 for the antiphase vibration wave, and then to the piezoelectric vibration element 30. The vibration member 20 is vibrated by the piezoelectric vibration element 30 according to the vibration waveform.

  In the present specification, the antiphase vibration wave generation unit 54 generates an antiphase vibration waveform by digital signal processing, and vibrates the vibration member 20 by supplying the vibration waveform to the piezoelectric vibration element 30 as an electric signal. However, an anti-phase vibration waveform may be generated by an analog circuit. Further, in principle, it is possible to generate a vibration waveform having an antiphase with respect to the external audio signal by shifting the traveling distance of the external audio signal by half wavelength.

  Next, the operation in the configuration of the in-vehicle noise reduction device shown in FIG. 2 will be described. The external sound collected by the external sound microphone 40 is supplied to the antiphase vibration wave generation unit 54 as an external sound signal via the A / D 51. The antiphase vibration wave generation unit 54 converts the waveform signal having a phase opposite to that of the external audio signal into a vibration waveform and provides the vibration waveform to the piezoelectric vibration element 30 via the A / D 55. The piezoelectric vibration element 30 vibrates the vibration member 20 in accordance with the vibration waveform, so that the vibration member 20 vibrates in a phase opposite to the phase of the external sound. As a result, the external sound is canceled and transmitted through the vibration member 20. It is possible to reduce the amplitude of transmitted sound.

  Further, the transmitted sound is completely silenced due to various reasons such as the characteristics of the vibration member 20, the difference between the sound collection timing of the external sound microphone 40 and the timing of vibrating the vibration member 20 by the piezoelectric vibration element 30. It is not easy. Therefore, it is useful to collect the transmitted sound and perform control using the transmitted sound signal as a teacher signal.

  The transmitted sound collected by the transmitted sound microphone 45 is supplied to the vibration adjustment unit 53 via the A / D 52 as a transmitted sound signal. For example, the vibration adjustment unit 53 detects the amplitude in each frequency band of the transmitted audio signal and notifies the amplitude in each frequency band to the antiphase vibration wave generation unit 54. The anti-phase vibration wave generation unit 54 generates an anti-phase waveform signal with respect to the external audio signal, weights the amplitude in each frequency band as a coefficient, and uses the weighted signal as a vibration waveform as an A / This is provided to the piezoelectric vibration element 30 via D55. The piezoelectric vibration element 30 vibrates the vibration member 20 in accordance with this vibration waveform, thereby canceling the external sound with higher accuracy and reducing the amplitude of the transmitted sound transmitted through the vibration member 20.

  In addition, for example, without using an external audio signal (without providing the external audio microphone 40), the feedback waveform is a vibration waveform in which the antiphase vibration wave generation unit 54 attenuates the transmitted audio signal based only on the transmitted audio signal. It is also possible to specify by.

  With the above configuration and operation, it is possible to prevent leakage of noise into the vehicle interior 11 by minimizing the transmitted sound generated as a result of the external sound signal including noise passing through the vibration member 20. Further, according to the above configuration and operation, useful sound in the vehicle 11 (music, voice guidance from the in-vehicle navigation device, conversation between passengers, etc.) is not erased due to noise reduction.

  Even if there are a plurality of locations where noise is likely to enter the vehicle interior 11 or locations near the sound source of the noise, the intrusion of noise into the vehicle interior 11 can be achieved by installing the above-mentioned vehicle noise reduction device at each location. It is possible to prevent. However, even in such a configuration, there is a possibility that noise leakage into the vehicle interior 11 cannot be completely prevented. For example, since the external sound cannot be in an ideal state of entering the vibration member 10 from one direction, it is actually impossible to completely erase with the vibration member 10. Further, as a result of vibration caused by external sound including noise in the vehicle interior 11 being transmitted through the body of the vehicle 10 and the vehicle interior wall 12 to vibrate the vehicle interior wall 12 at another location, one vibration member 20 (or one vibration member at one location). There is a possibility that the external sound cannot be shielded only with 20 vibrations). Further, the transmitted voice cannot be completely erased, and noise that has entered the vehicle may be reflected (echoed) in the vehicle 11 and may reach the vicinity of the passenger's head from various directions.

  In order to prevent noise intrusion into the vehicle interior 11 due to vibration transmitted through the body of the vehicle 11 and the vehicle interior wall 12 and the echo of the noise that has entered the vehicle interior 11, a plurality of vehicles installed in different locations of the vehicle The noise reduction device may be operated in cooperation.

  For example, an in-vehicle noise reduction device acquires an external sound and / or transmitted sound collected by another in-vehicle noise reduction device, or a vibration waveform that vibrates the vibration member 20 in another in-vehicle noise reduction device. The anti-phase vibration wave generation unit 54 takes into account the influence that the external sound, transmitted sound, vibration waveform, etc. in such another in-vehicle noise reduction device have on the noise to be eliminated by the own vehicle noise reduction device. By generating and transmitting a vibration waveform that further reflects the influence of the noise, it may be possible to eliminate noise at another location and its reverberation sound.

  Further, for example, as shown in FIG. 3, a vehicle noise reduction device can generate and transmit vibration waveforms in the vibration members 20 installed at various locations in the vehicle. A sound antiphase vibration wave generation unit 60 may be further provided, and a vibration waveform for vibrating each vibration member 20 may be provided to the piezoelectric vibration element 30 installed in each vibration member 20 via the A / D 61. According to this configuration, for example, the in-vehicle noise reduction device is disposed only at one location, and the vibration waveform is supplied to the plurality of vibration members 20 on which the piezoelectric vibration elements 30 are installed to vibrate the vibration member 20. It becomes possible.

  In addition, by using the transmission waveform or attenuation rate when external sound, transmitted sound, vibration waveform, etc. in another in-vehicle noise reduction device are transmitted to or reflected in the in-vehicle noise reduction device, noise at another location can be obtained. It is possible to calculate a vibration waveform that takes into account the effects of.

  The present invention has an effect that noise can be eliminated without erasing useful sound in the vehicle by a simpler configuration than the conventional method while performing soundproofing of the vehicle inner wall by the sound field boundary method. The present invention relates to a technique for reducing noise in a vehicle that is felt by a vehicle occupant during the ride.

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Car interior 12 Car interior wall 20 Vibrating member 30 Piezoelectric vibration element 40 External sound microphone 45 Transmitted sound microphone 50 Signal processing unit 51, 52 A / D (analog / digital conversion unit)
53 Vibration Adjustment Unit 54 Antiphase Vibration Wave Generation Unit 55 D / A (Digital / Analog Conversion Unit)
60 Transmitted sound anti-phase vibration wave generator

Claims (7)

An in-vehicle noise reduction device for reducing in-vehicle noise felt by a vehicle occupant during boarding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vehicle outside sound collecting means disposed outside the vehicle and collecting external sound outside the vehicle;
An antiphase waveform generating means for generating an antiphase waveform of the external sound collected by the vehicle exterior sound collector;
Vibration means for applying vibration of the waveform of the opposite phase generated by the opposite phase waveform generation means to the vibration member, and reducing vibration of the vibration member caused by the external sound;
In-vehicle noise reduction device. An in-vehicle noise reduction device for reducing in-vehicle noise felt by a vehicle occupant during boarding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vibration detecting means for detecting vibration of the vibrating member including the influence of external sound;
An anti-phase waveform generating means for generating an anti-phase waveform of the vibration detected by the vibration detecting means;
Vibration means for applying vibration of the reverse phase waveform generated by the reverse phase waveform generation means to the vibration member and reducing vibration detected by the vibration detection means;
In-vehicle noise reduction device. Vehicle-side sound collecting means that is disposed inside the vehicle and collects the external sound that has passed through the vibration member as passing sound;
3. The interior of the vehicle according to claim 1, wherein the antiphase waveform generating unit is configured to generate the antiphase waveform so as to erase the passing sound collected by the vehicle interior sound collecting unit. Noise reduction device. An in-vehicle noise reduction device for reducing in-vehicle noise felt by a vehicle occupant during boarding,
A vibration member installed in the vicinity of the vehicle inner wall forming the vehicle interior;
Vehicle-side sound collecting means that is disposed inside the vehicle and collects the external sound that has passed through the vibration member as passing sound;
Anti-phase waveform generating means for generating an anti-phase waveform so as to further erase the characteristics of the passing sound collected by the vehicle interior sound collecting means;
Vibration means for applying vibration of the waveform of the opposite phase generated by the opposite phase waveform generation means to the vibration member and reducing the passing sound collected by the vehicle interior sound collection means;
In-vehicle noise reduction device. Transmission vibration anti-phase waveform generation means for calculating and generating an anti-phase waveform of vibration to be given to the other vibration member when vibration by the vibration member or the passing sound is transmitted to another vibration member;
5. The in-vehicle noise reduction device according to claim 1, wherein the vibration component having the reverse phase waveform generated by the transmission vibration reverse phase waveform generation unit is applied to the another vibration member. 6. .   The anti-phase waveform generation means is obtained in an external sound obtained in another in-vehicle noise reduction device, vibration of a vibration member obtained in the another in-vehicle noise reduction device, and in the another in-vehicle noise reduction device. 6. The method according to claim 1, wherein the waveform of the opposite phase reflecting the influence of the vibration of the vibration member in the another in-vehicle noise reduction device is generated based on any of the passing voices. Vehicle noise reduction device as described in one.   The vehicle interior noise reduction device according to any one of claims 1 to 6, wherein the vehicle interior wall is configured to be used as the vibration member.

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