WO2019059006A1 - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
WO2019059006A1
WO2019059006A1 PCT/JP2018/033274 JP2018033274W WO2019059006A1 WO 2019059006 A1 WO2019059006 A1 WO 2019059006A1 JP 2018033274 W JP2018033274 W JP 2018033274W WO 2019059006 A1 WO2019059006 A1 WO 2019059006A1
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WO
WIPO (PCT)
Prior art keywords
sound
audio signal
phase
speakers
channel
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PCT/JP2018/033274
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French (fr)
Japanese (ja)
Inventor
正則 小杉
哲也 江川
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株式会社東海理化電機製作所
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Publication of WO2019059006A1 publication Critical patent/WO2019059006A1/en

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control

Definitions

  • the present invention relates to an acoustic device.
  • a cancellation signal for the downmixed signal is generated, the sound by the downmixed signal is output from the first speaker, and the sound by the cancellation signal is symmetrical to the first speaker
  • the cancellation signal is an antiphase signal of the sensed sound signal, and it is said that the sound can be prevented from propagating to other space and the noise to the outside can be cut off.
  • the acoustic device disclosed in Patent Document 1 does not assume that the relative position between the viewer and the speaker changes. For this reason, in the said audio apparatus, when the relative position of a viewer and a speaker changes, the subject that a sound image can not be maintained arises. In particular, when the speaker is mounted on the steering wheel, the relative position between the occupant (driver) and the speaker changes, which causes a problem that the three-dimensional sound image localized in the ear of the occupant (driver) can not be maintained.
  • An object of the present invention is to provide an acoustic device capable of maintaining a three-dimensional sound image even when the relative position between an occupant (driver) and a speaker changes.
  • An acoustic device has the following configurations [1] to [10].
  • An acoustic device mounted on a vehicle comprising at least two speakers arranged to sandwich the center line of the seat on the front side of the front of an occupant seated in the seat, the occupant, and the at least two Based on the position detection unit that detects the relative position of the speakers, and the relative position detected by the position detection unit, each speaker is output so as to maintain a three-dimensional sound image by the sound output from the at least two speakers.
  • An acoustic device comprising: [2] The acoustic device according to the above [1], wherein the at least two speakers are provided on a steering wheel of the vehicle.
  • the acoustic device according to the above [1] or [2], wherein the at least two speakers are arranged symmetrically with respect to a center line of the steering wheel.
  • the sound device according to any one of [1] to [3], wherein the directivity of the output of each of the at least two speakers is omnidirectional.
  • the acoustic device according to any one of [1] to [4], wherein the at least two speakers are provided in a switch device provided on a steering wheel.
  • the control unit is configured to, among the at least two speakers, an audio signal of a right channel corresponding to a speaker disposed on the right side with respect to the center line, and the center line of the at least two speakers.
  • Phase adjusting means for performing phase delay processing according to the relative position to the audio signal of the left channel corresponding to the speaker disposed on the left side with respect to the above, the audio signal of the right channel and the phase adjusting means
  • the left-channel audio signal delayed by phase, the left-channel audio signal and the right-channel audio signal delayed by the phase adjustment means are respectively added and drive signals of left and right channels are added.
  • the acoustic device according to any one of the above [1] to [5], including an addition unit that outputs.
  • the control unit is configured to combine the sound based on the sound signal of the right channel with the sound based on the sound signal of the right channel delayed by the phase adjustment unit in the right ear of the occupant Of the passenger such that the synthetic sound of the sound based on the voice signal of the left channel and the sound based on the voice signal of the left channel phase-delayed by the phase adjustment means is minimized, and In the left ear, the synthesized sound of the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed in phase by the phase adjustment means is maximized, and the audio signal of the right channel is Synthesis of the sound based on the sound and the sound based on the audio signal of the right channel phase-delayed by the phase adjustment means is minimized , Respectively set the phase difference in said phase adjusting means, the acoustic apparatus according to [6].
  • the acoustic apparatus as described in.
  • the position detection unit includes a steering angle sensor that detects a steering angle associated with the rotation operation of the steering wheel, the steering angle, and distances from the at least two speakers to the right and left ears of the occupant.
  • the storage unit stores in advance the relationship of the above, and based on the steering angle detected by the steering angle sensor, from the storage unit to the relative position as the relative position from the at least two speakers to the right and left ears of the occupant.
  • the acoustic device according to any one of the above [1] to [8], which calculates each of the distances.
  • an acoustic device capable of maintaining a three-dimensional sound image even when the relative position between an occupant (driver) and a speaker changes.
  • FIG. 1 is a top plan view of an exemplary arrangement of speakers in an acoustic device according to an embodiment of the present invention as viewed from above the vehicle.
  • FIG. 2 is a side view of the acoustic device shown in FIG. 1 as viewed from the A direction.
  • FIG. 3A is a front view showing a steering wheel in a case where left and right speakers are respectively provided in spokes of a steering wheel as an arrangement example of the speakers in the acoustic device according to the embodiment.
  • FIG. 3B is a front view showing a steering wheel in a case where left and right speakers are respectively provided on steering switches provided on the steering wheel as an arrangement example of the speakers in the acoustic device according to the embodiment.
  • FIG. 1 is a top plan view of an exemplary arrangement of speakers in an acoustic device according to an embodiment of the present invention as viewed from above the vehicle.
  • FIG. 2 is a side view of the acoustic device shown in FIG. 1 as viewed from the A
  • FIG. 4A is an explanatory view showing the directivity in the XY plane of the directivity of the speaker when the directivity of the speaker is omnidirectional.
  • FIG. 4B is an explanatory view showing the directivity in the XZ plane of the directivity of the speaker when the directivity of the speaker is omnidirectional.
  • FIG. 5 is a top plan view corresponding to FIG. 1 showing the positional relationship between the two speakers and the occupant (driver) when the steering wheel is rotated and the steering angle ⁇ is detected.
  • the acoustic device 1 is the acoustic device 1 mounted on the vehicle 5, and the center line 11 of the seat 10 is on the front side of the driver 20 who is an occupant seated on the seat 10.
  • the control unit 100 is configured to control the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image of the sound output from the two speakers 30 and 40 is maintained.
  • the driver is the driver 20.
  • two speakers 30 and 40 will be described as being arranged symmetrically with respect to the center line 8 a of the steering wheel 8.
  • the speakers 30, 40 are disposed in front of the seat 10, that is, in front of the driver 20 seated in the seat 10.
  • the two speakers 30, 40 are, for example, arranged symmetrically with respect to the center line 8a of the steering wheel 8.
  • the speakers 30 and 40 can output sound in a predetermined frequency band, and can output, for example, a warning sound, a warning sound, and the like by control from the vehicle side.
  • the direction of the ear of the driver 20 from the speaker is X
  • the width direction of the vehicle 5 is Y
  • the direction defined by the outer product of X and Y axes is The Z direction is the vertical direction of 5.
  • the right speaker 30 is disposed such that its directivity is strong toward the right ear 21 of the driver 20.
  • the left speaker 40 is disposed such that the directivity thereof becomes stronger toward the left ear 22 of the driver 20. That is, by mounting the speakers 30, 40 on the steering wheel 8, the output shaft 31 of the right speaker 30 can be directed in the direction of the right ear 21 of the driver 20, and the output shaft 41 of the left speaker 40 operates. In the direction of the left ear 22 of the person 20.
  • the left speaker 40 is disposed slightly upward toward the driver's 20 ear.
  • the X axis and the Z axis are X, Y and Z axes which are slightly rotated around the Y axis.
  • the left speaker 40 is slightly upward (so that the output shaft 41 of the left speaker 40 is in the direction of the left ear 22 of the driver 20) Is arranged in the X axis direction).
  • the right speaker 30 is disposed slightly upward (in the X-axis direction).
  • the directivity of the two speakers 30 and 40 is arranged to be stronger toward the ears 21 and 22 of the occupant.
  • two speakers 30, 40 may be provided in the spokes 9 of the steering wheel 8, respectively. That is, with respect to the center line 8 a of the steering wheel 8, the right speaker 30 can be disposed on the right side of the spoke portion 9, and the left speaker 40 can be disposed on the left side of the spoke portion 9.
  • the center line 8a of the steering wheel 8 is a line passing through the center of the steering wheel 8 when the steering angle is zero when the steering operation is not performed.
  • the right audio signal S1 and the left audio signal S2 to the right speaker 30 and the left speaker 40 can be input from the vehicle body side via, for example, a steering roll connector (not shown).
  • two speakers 30, 40 can be provided in the steering switches 50, 60 as switch devices provided on the steering wheel 8, respectively. That is, the right speaker 30 is disposed on the steering switch 50 provided on the right side of the spoke portion 9 with respect to the center line 8 a of the steering wheel 8, and the left speaker 40 is disposed on the steering switch 60 provided on the left side of the spoke portion 9 be able to.
  • the steering switches 50 and 60 are switches that can be used for vehicle operation, air conditioning control, audio control, car navigation operation, and the like.
  • the two speakers 30, 40 can be electrically connected to the vehicle body side together with the steering switches 50, 60, for example, via a steering roll connector (not shown).
  • the right audio signal S1 and the left audio signal S2 to the right speaker 30 and the left speaker 40 can be input from the vehicle body side via, for example, a steering roll connector (not shown).
  • the directivity characteristics of the speaker shown in FIG. 4A and FIG. 4B show the case where the directivity of the speaker is omnidirectional.
  • the directivity characteristic indicating the spread of the sound output from the speakers 30 and 40 is maximum at point 36a on the X axis of the sound wave surface 36, and the sound pressure is reduced by 6 dB from the maximum sound pressure on the X axis
  • the opening angle defined by the points 36 b and 36 c is defined as the directivity angle ⁇ .
  • the pointing angle in the Y direction is ⁇ .
  • the directional characteristic indicating the spread of the sound output from the speakers 30 and 40 has the maximum point 36a on the X axis of the sound wave surface 36, and the sound pressure drops by 6 dB from the maximum sound pressure on the X axis
  • the opening angle defined by the points 36 b and 36 c is defined as the directivity angle ⁇ .
  • the directivity angle in the Z direction is ⁇ .
  • the directivity characteristics of the speaker shown in FIGS. 4A and 4B have omnidirectionality (nondirectionality). .
  • omnidirectional speakers 30 and 40 By mounting such omnidirectional speakers 30 and 40 on the steering wheel 8, the sound output from the speakers 30 and 40 can be obtained even when the steering wheel 8 is rotated with the operation of the vehicle 5. Localization of the sound image is easy to maintain.
  • the position detection unit 70 detects the relative position of the driver 20 and the two speakers 30 and 40. By detecting this relative position, the linear distance between the speakers 30, 40 and the right ear 21 and the left ear 22 of the driver 20 can be calculated. This calculation can be performed by an operation unit, for example, a microcomputer, provided in the position detection unit 70.
  • the position detection unit 70 can be, for example, a steering angle sensor that detects a steering angle ⁇ accompanying the rotation operation of the steering wheel 8 as shown in FIG. 2.
  • the steering angle sensor can be shared with a steering angle sensor provided for the vehicle 5 to perform control associated with various driving operations.
  • the position detection unit 70 is not limited to the steering angle sensor, and may be any device that detects the relative position of the driver 20 and the two speakers 30 and 40.
  • a camera (not shown) mounted on an instrument panel or a camera (not shown) mounted on a steering wheel may be used. Based on the images taken by these cameras, for example, the positions of the right ear 21 and the left ear 22 of the driver 20 are specified by a template matching method, and the position of the spokes 9 of the steering wheel 8 is detected. Thus, the relative position between the driver 20 and the two speakers 30, 40 can be detected.
  • the control unit 100 includes a drive unit 110 that drives the right speaker 30 and a drive unit 120 that drives the left speaker 40.
  • the driving unit 110 adds the right audio signal S1 and the phase adjustment signal S21 of the left audio signal S2 and amplifies the same to drive the right speaker 30.
  • the drive unit 120 adds the left audio signal S2 and the phase adjustment signal S12 of the right audio signal S1 and amplifies the same to drive the left speaker 40.
  • the phase adjustment circuit 115 adjusts the phase of the right audio signal S1 (phase delay), and outputs the phase adjustment signal S12 to the drive unit 120.
  • the phase adjustment can be appropriately set as the phase difference ⁇ ° between the right audio signal S1 and the phase adjustment signal S12.
  • the phase adjustment circuit 125 adjusts the phase of the left audio signal S2 (phase delay), and outputs the phase adjustment signal S21 to the drive unit 110.
  • the phase adjustment can be appropriately set as the phase difference ⁇ ° between the left audio signal S2 and the phase adjustment signal S21.
  • the setting of the phase difference ⁇ ° is a case where the two speakers 30, 40 are arranged symmetrically with respect to the center line 11 of the seat 10, and the speakers 30, 40 sandwich the center line 11 of the seat 10.
  • the phase difference set by the phase adjustment circuit 115 and the phase adjustment circuit 125 can be set to different values when they are arranged asymmetrically.
  • Each of the drive units 110 and 120 and the phase adjustment circuits 115 and 125 described above can adjust the gain. Therefore, as shown in FIG. 1, the addition ratio of the right audio signal S1 and the phase adjustment signal S21 in the drive unit 110 and the addition ratio of the left audio signal S2 and the phase adjustment signal S12 in the drive unit 120 can be adjusted. Moreover, the sound pressure output from the right speaker 30 and the left speaker 40 can be adjusted, and the balance between the left and right stereo sounds can also be adjusted.
  • the control unit 100 controls the characteristics of the sound output from each of the speakers so that the three-dimensional sound image of the sounds output from the two speakers 30 and 40 is maintained.
  • the right ear 21 receives the sound S30 of the right channel output from the right speaker 30 and the phase-adjusted sound S40d of the left channel, and the sound S40 of the left channel output from the left speaker 40 and the phase of the right channel The adjusted sound S30d arrives.
  • the sound of the right channel that reaches the right ear 21 is the sound S30 of the right channel and the phase-adjusted sound S30d of the right channel.
  • the sound of the left channel reaching the right ear 21 is the sound S40 of the left channel and the sound S40d of which the phase is adjusted in the left channel.
  • control unit 100 determines that the synthesized sound of the sound S30 of the right channel and the phase-adjusted sound S30d of the right channel is the largest, and the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d is the smallest. Control to be
  • the control unit 100 proceeds to the sound S30 traveling on the distance L11 and the distance L21.
  • a distance L11 is a distance from the right speaker 30 to the right ear 21, and a distance L21 is a distance from the left speaker 40 to the right ear 21.
  • the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel can be minimum at the right ear 21.
  • the sound S30 of the right channel and the left sound can be detected at the position of the right ear 21.
  • Cross talk of the channel sound S40 is reduced or canceled.
  • the left ear 22 receives the sound S40 of the left channel output from the left speaker 40 and the phase-adjusted sound S30d of the right channel, and the sound S30 of the right channel output from the right speaker 30 The phase-adjusted sound S40d of the left channel arrives.
  • the sound of the left channel reaching the left ear 22 is the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel.
  • the sound of the right channel reaching the left ear 22 is the sound S30 of the right channel and the sound S30d of which the phase of the right channel is adjusted.
  • control unit 100 determines that the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel is the largest, and the synthesized sound of the sound S30 of the right channel and the phase-adjusted sound S30d is the smallest. Control to be
  • the control unit 100 proceeds the sound S40 traveling on the distance L22 and the distance L12.
  • the distance L22 is the distance from the left speaker 40 to the left ear 22
  • the distance L12 is the distance from the right speaker 30 to the left ear 22.
  • the sound can be localized at the ear, and control can be performed such that a three-dimensional sound image by the sounds output from the two speakers is maintained.
  • the distance L11 from the right speaker 30 to the right ear 21 described above can be expressed by a function L11 ( ⁇ ) that changes with the steering angle ⁇ .
  • the distance L22 from the left speaker 40 to the left ear 22 can be represented by a function L22 ( ⁇ ).
  • the distance L12 from the right speaker 30 to the left ear 22 can be represented by a function L12 ( ⁇ )
  • the distance L21 from the left speaker 40 to the right ear 21 can be represented by a function L21 ( ⁇ ).
  • L11 ( ⁇ ), L22 ( ⁇ ), L12 ( ⁇ ), and L21 ( ⁇ ) can be calculated from the steering angle ⁇ stored in advance in the position detection unit 70 and the table values of the respective distances.
  • the linear distances to the speakers 30, 40 and the right ear 21 and the left ear 22 can be three-dimensionally calculated and calculated based on the steering angle ⁇ .
  • the distance L22, the distance L12 from the right speaker 30 to the left ear 22, and the distance L21 from the left speaker 40 to the right ear 21 are functions L11 ( ⁇ ), L22 ( ⁇ ), L12 ( ⁇ ) of the steering angle ⁇ , respectively. It may be controlled as L21 ( ⁇ ).
  • the control unit 100 controls the localization of the sound image in a state in which
  • the embodiment of the present invention is not limited to the two speakers shown above, and is applicable to the case where three or more speakers are arranged with the center line 11 of the seat 10 interposed therebetween. That is, in consideration of the distance from the speaker of the sound output from each speaker to the occupant's ear and the phase difference, the phase difference should be set so that the synthesized sound is maximum and minimum in each of the right and left ears. The crosstalk between the sound of the right channel and the sound of the left channel is reduced or canceled out. Thus, even in the case of three or more speakers, sound can be localized at the ear, and control can be performed so that a three-dimensional sound image by sounds output from three or more speakers is maintained.
  • the acoustic device 1 is the acoustic device 1 mounted on the vehicle 5 and is located at the center of the seat 10 on the front side of the driver 20 who is an occupant seated in the seat 10.
  • the position detection unit 70 that detects the relative position of the two speakers 30, 40 arranged so as to sandwich the line 11, the driver 20 and the two speakers 30, 40
  • the control unit 100 is configured to control the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image of the sound output from the two speakers 30 and 40 is maintained.
  • the position detection unit 70 for detecting the relative position of the driver 20 and the two speakers 30 and 40 Since the position detection unit 70 for detecting the relative position of the driver 20 and the two speakers 30 and 40 is provided, the steering wheel is rotated and the relative position between the passenger (driver) and the speaker changes. However, it can maintain a three-dimensional sound image. (2) Since the position detection unit 70 is provided, even when the steering wheel is rotated and the localization of the sound S30 in the right channel and the sound S40 in the left channel is interchanged, localization is made to the ears of the occupant (driver) It is controllable to maintain a three-dimensional sound image.
  • Each speaker can be provided in the spokes 9 of the steering wheel 8 or can be provided in the steering switches 50 and 60 as switch devices provided in the steering wheel 8.
  • the switch device mounted on the steering wheel can be provided with an audio notification means, and the functions of the steering switch can be expanded.
  • the localization control of the sound image by the control unit 100 is possible, and in particular, by making the directivity of the speakers 30, 40 omnidirectional (nondirectional), the output from the speaker mounted on the steering wheel Sound can be stably localized at the ear of a passenger (driver).
  • Reference Signs List 1 acoustic device 5 vehicle 8 steering wheel 8a center line 20 driver 21 right ear 22 left ear 30 speaker 40 left speaker 50, 60 steering switch 70 position detection unit 100 control unit 110 drive unit 115 phase adjustment circuit 120 drive unit 125 phase adjustment circuit

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Stereophonic System (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

An acoustic device 1 mounted in a vehicle 5 and having: two speakers 30, 40 arranged so as to interpose therebetween a center line 11 of a seat 10, further forward than the front of a driver 20 being an occupant sitting in the seat 10; a position detection unit 70 that detects the relative position of a driver 20 and the two speakers 30, 40; and a control unit 100 that controls the characteristics of sound output from each speaker 30, 40, on the basis of the relative position detected by the position detection unit 70, so as to maintain a stereophonic sound image caused by sound output from the two speakers 30, 40.

Description

音響装置Sound equipment 関連出願の相互参照Cross-reference to related applications
本出願は、２０１７年９月１９日に出願された日本国特許出願２０１７－１７９０９２号の優先権を主張するものであり、日本国特許出願２０１７－１７９０９２号の全内容を本出願に参照により援用する。 This application claims the priority of Japanese Patent Application No. 2017-179092 filed on Sep. 19, 2017, and the entire content of Japanese Patent Application No. 2017-179092 is incorporated by reference into this application. Do.
本発明は、音響装置に関する。 The present invention relates to an acoustic device.
オーディオシステムにおいて、動作モードが夜間静音モードである場合、ダウンミキシングした信号に対する相殺信号を生成し、ダウンミキシングした信号による音を第１スピーカから出力し、相殺信号による音を第１スピーカと対称位置に存在する第２スピーカから出力する音響装置がある（例えば、特許文献１参照）。相殺信号は、感知された音の信号の逆位相信号であり、他の空間に音が伝播することを抑え、外部への騒音を遮断できるとされている。 In the audio system, when the operation mode is the night silent mode, a cancellation signal for the downmixed signal is generated, the sound by the downmixed signal is output from the first speaker, and the sound by the cancellation signal is symmetrical to the first speaker There is an acoustic device that outputs from the second speaker present in (see, for example, Patent Document 1). The cancellation signal is an antiphase signal of the sensed sound signal, and it is said that the sound can be prevented from propagating to other space and the noise to the outside can be cut off.
特開２０１０－１６４９７０号公報Unexamined-Japanese-Patent No. 2010-164970
特許文献１に開示された音響装置は、視聴者とスピーカとの相対位置が変化することを想定していない。このため、当該音響装置では、視聴者とスピーカとの相対位置が変化した場合に音像を維持できない、という課題が生じる。特に、スピーカがステアリングホイールに搭載された場合には乗員（運転者）とスピーカとの相対位置が変化し、乗員（運転者）の耳に定位する立体音像を維持できない、という課題が生じる。 The acoustic device disclosed in Patent Document 1 does not assume that the relative position between the viewer and the speaker changes. For this reason, in the said audio apparatus, when the relative position of a viewer and a speaker changes, the subject that a sound image can not be maintained arises. In particular, when the speaker is mounted on the steering wheel, the relative position between the occupant (driver) and the speaker changes, which causes a problem that the three-dimensional sound image localized in the ear of the occupant (driver) can not be maintained.
本発明の目的は、乗員（運転者）とスピーカとの相対位置が変化した場合であっても立体音像を維持できる音響装置を提供することにある。 An object of the present invention is to provide an acoustic device capable of maintaining a three-dimensional sound image even when the relative position between an occupant (driver) and a speaker changes.
本発明の一実施形態による音響装置は、下記［１］～［１０］の構成を有する。 An acoustic device according to an embodiment of the present invention has the following configurations [1] to [10].
［１］車両に搭載される音響装置であって、座席に着座した乗員の正面よりも前側において前記座席の中心線を挟むように配置された少なくとも２つのスピーカと、前記乗員と前記少なくとも２つのスピーカの相対位置を検出する位置検出部と、位置検出部で検出された前記相対位置に基づいて、前記少なくとも２つのスピーカから出力される音による立体音像が維持されるように各スピーカから出力される音の特性を制御する制御部と、を備える音響装置。
［２］前記少なくとも２つのスピーカは、前記車両のステアリングホイールに設けられている、上記［１］に記載の音響装置。
［３］前記少なくとも２つのスピーカは、前記ステアリングホイールの中心線に対して対称に配置されている、上記［１］又は［２］に記載の音響装置。
［４］前記少なくとも２つのスピーカは、それぞれのスピーカの出力の指向性が全方位である、上記［１］から［３］のいずれか１に記載の音響装置。
［５］前記少なくとも２つのスピーカは、ステアリングホイールに設けられるスイッチ装置に備えられている、上記［１］から［４］のいずれか１に記載の音響装置。
［６］前記制御部は、前記少なくとも２つのスピーカのうち、前記中心線に対して右側に配置されるスピーカに対応する、右チャンネルの音声信号、及び前記少なくとも２つのスピーカのうち、前記中心線に対して左側に配置されるスピーカに対応する、左チャンネルの音声信号に対して、前記相対位置に応じた位相遅延処理を行う位相調整手段と、前記右チャンネルの前記音声信号と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号、及び前記左チャンネルの前記音声信号と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号をそれぞれ加算して左右のチャンネルの駆動信号を出力する加算手段を備えた、上記［１］から［５］のいずれか１に記載の音響装置。
［７］前記制御部は、前記乗員の前記右耳において、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との合成音が最大となり、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との合成音が最小となるように、かつ、前記乗員の前記左耳において、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との合成音が最大となり、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との合成音が最小となるように、前記位相調整手段における位相差をそれぞれ設定する、上記［６］に記載の音響装置。
［８］前記制御部は、前記乗員の前記右耳において、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との位相差が２πｎ（ｎ＝０、１、２・・・）となり、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との位相差がπｎ（ｎ＝０、１、２・・・）となるように、かつ、前記乗員の前記左耳において、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との位相差が２πｎ（ｎ＝０、１、２・・・）となり、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との位相差がπｎ（ｎ＝０、１、２・・・）となるように、前記位相調整手段における位相差をそれぞれ設定する、上記［９］に記載の音響装置。
［９］前記位置検出部は、前記ステアリングホイールの回転操作に伴う操舵角を検出する舵角センサと、前記操舵角と前記少なくとも２つのスピーカから前記乗員の右耳及び左耳までの各距離との関係を予め記憶した記憶部を有し、前記舵角センサが検出した前記操舵角に基づいて、前記記憶部から前記相対位置として前記少なくとも２つのスピーカから前記乗員の右耳及び左耳までの前記各距離を算出する、上記［１］から［８］のいずれか１に記載の音響装置。
［１０］前記制御部は、前記舵角センサが検出した前記操舵角が９０°を超える場合、あるいはさらに前記ステアリングホイールが１回転した場合、前記右チャンネルの前記音声信号と前記左チャンネルの前記音声信号を入れ替える、上記［９］に記載の音響装置。 [1] An acoustic device mounted on a vehicle, comprising at least two speakers arranged to sandwich the center line of the seat on the front side of the front of an occupant seated in the seat, the occupant, and the at least two Based on the position detection unit that detects the relative position of the speakers, and the relative position detected by the position detection unit, each speaker is output so as to maintain a three-dimensional sound image by the sound output from the at least two speakers. An acoustic device comprising:
[2] The acoustic device according to the above [1], wherein the at least two speakers are provided on a steering wheel of the vehicle.
[3] The acoustic device according to the above [1] or [2], wherein the at least two speakers are arranged symmetrically with respect to a center line of the steering wheel.
[4] The sound device according to any one of [1] to [3], wherein the directivity of the output of each of the at least two speakers is omnidirectional.
[5] The acoustic device according to any one of [1] to [4], wherein the at least two speakers are provided in a switch device provided on a steering wheel.
[6] The control unit is configured to, among the at least two speakers, an audio signal of a right channel corresponding to a speaker disposed on the right side with respect to the center line, and the center line of the at least two speakers. Phase adjusting means for performing phase delay processing according to the relative position to the audio signal of the left channel corresponding to the speaker disposed on the left side with respect to the above, the audio signal of the right channel and the phase adjusting means The left-channel audio signal delayed by phase, the left-channel audio signal and the right-channel audio signal delayed by the phase adjustment means are respectively added and drive signals of left and right channels are added. The acoustic device according to any one of the above [1] to [5], including an addition unit that outputs.
[7] The control unit is configured to combine the sound based on the sound signal of the right channel with the sound based on the sound signal of the right channel delayed by the phase adjustment unit in the right ear of the occupant Of the passenger such that the synthetic sound of the sound based on the voice signal of the left channel and the sound based on the voice signal of the left channel phase-delayed by the phase adjustment means is minimized, and In the left ear, the synthesized sound of the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed in phase by the phase adjustment means is maximized, and the audio signal of the right channel is Synthesis of the sound based on the sound and the sound based on the audio signal of the right channel phase-delayed by the phase adjustment means is minimized , Respectively set the phase difference in said phase adjusting means, the acoustic apparatus according to [6].
[8] The control unit controls the phase difference between the sound based on the audio signal of the right channel and the sound based on the audio signal of the right channel phase-delayed by the phase adjustment unit in the right ear of the occupant Is 2π n (n = 0, 1, 2...), And the phase difference between the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed by the phase adjustment means Of the sound based on the audio signal of the left channel and the phase delaying means by the phase adjusting means such that π n (n = 0, 1, 2...) And the left ear of the occupant The phase difference with the sound based on the sound signal of the left channel is 2πn (n = 0, 1, 2,...), And the sound based on the sound signal of the right channel and the phase delay means Setting the phase difference in the phase adjustment unit such that the phase difference with the sound based on the sound signal of the right channel is π n (n = 0, 1, 2,...), ] The acoustic apparatus as described in.
[9] The position detection unit includes a steering angle sensor that detects a steering angle associated with the rotation operation of the steering wheel, the steering angle, and distances from the at least two speakers to the right and left ears of the occupant. The storage unit stores in advance the relationship of the above, and based on the steering angle detected by the steering angle sensor, from the storage unit to the relative position as the relative position from the at least two speakers to the right and left ears of the occupant The acoustic device according to any one of the above [1] to [8], which calculates each of the distances.
[10] When the steering angle detected by the steering angle sensor exceeds 90 °, or when the steering wheel makes one rotation, the control unit causes the sound signal of the right channel and the sound of the left channel The acoustic device according to the above [9], which switches signals.
本発明の一実施形態によれば、乗員（運転者）とスピーカとの相対位置が変化した場合であっても立体音像を維持できる音響装置を提供することができる。 According to one embodiment of the present invention, it is possible to provide an acoustic device capable of maintaining a three-dimensional sound image even when the relative position between an occupant (driver) and a speaker changes.
図１は、本発明の実施の形態に係る音響装置におけるスピーカの配置例を車両の上方向から見た上平面図である。FIG. 1 is a top plan view of an exemplary arrangement of speakers in an acoustic device according to an embodiment of the present invention as viewed from above the vehicle. 図２は、図１に示す音響装置において、Ａ方向から見た、側面図である。FIG. 2 is a side view of the acoustic device shown in FIG. 1 as viewed from the A direction. 図３Ａは、実施の形態に係る音響装置におけるスピーカの配置例として、左右のスピーカがそれぞれステアリングホイールのスポーク部に備えられている場合のステアリングホイールを示す正面図である。FIG. 3A is a front view showing a steering wheel in a case where left and right speakers are respectively provided in spokes of a steering wheel as an arrangement example of the speakers in the acoustic device according to the embodiment. 図３Ｂは、実施の形態に係る音響装置におけるスピーカの配置例として、左右のスピーカがそれぞれステアリングホイールに設けられるステアリングスイッチに備えられている場合のステアリングホイールを示す正面図である。FIG. 3B is a front view showing a steering wheel in a case where left and right speakers are respectively provided on steering switches provided on the steering wheel as an arrangement example of the speakers in the acoustic device according to the embodiment. 図４Ａは、スピーカの指向性が全方位性を有する場合において、スピーカの指向特性のＸＹ面における指向特性を示す説明図である。FIG. 4A is an explanatory view showing the directivity in the XY plane of the directivity of the speaker when the directivity of the speaker is omnidirectional. 図４Ｂは、スピーカの指向性が全方位性を有する場合において、スピーカの指向特性のＸＺ面における指向特性を示す説明図である。FIG. 4B is an explanatory view showing the directivity in the XZ plane of the directivity of the speaker when the directivity of the speaker is omnidirectional. 図５は、ステアリングホイールが回転操作されて操舵角φが検出された場合の、２つのスピーカと乗員（運転者）との位置関係を示す、図１に相当する上平面図である。FIG. 5 is a top plan view corresponding to FIG. 1 showing the positional relationship between the two speakers and the occupant (driver) when the steering wheel is rotated and the steering angle φ is detected.
（本発明の実施の形態）
本発明の実施の形態に係る音響装置１は、車両５に搭載される音響装置１であって、座席１０に着座した乗員である運転者２０の正面よりも前側において座席１０の中心線１１を挟むように配置された２つのスピーカ３０、４０と、運転者２０と２つのスピーカ３０、４０の相対位置を検出する位置検出部７０と、位置検出部７０で検出された相対位置に基づいて、２つのスピーカ３０、４０から出力される音による立体音像が維持されるように各スピーカから出力される音の特性を制御する制御部１００と、を備えて構成されている。 (Embodiment of the present invention)
The acoustic device 1 according to the embodiment of the present invention is the acoustic device 1 mounted on the vehicle 5, and the center line 11 of the seat 10 is on the front side of the driver 20 who is an occupant seated on the seat 10. Based on the relative positions detected by the position detection unit 70 and the position detection unit 70 that detects the relative positions of the two speakers 30 and 40 arranged so as to sandwich, the driver 20 and the two speakers 30 and 40, The control unit 100 is configured to control the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image of the sound output from the two speakers 30 and 40 is maintained.
本実施の形態では、乗員が運転者２０であるものとして説明する。また、少なくとも２つのスピーカの一例として、２つのスピーカ３０、４０がステアリングホイール８の中心線８ａに対して対称に配置されているものとして説明する。 In the present embodiment, it is assumed that the driver is the driver 20. In addition, as an example of at least two speakers, two speakers 30 and 40 will be described as being arranged symmetrically with respect to the center line 8 a of the steering wheel 8.
（スピーカの配置）
図１に示すように、車両５において、座席１０の前方、すなわち、座席１０に着座した運転者２０の前方に２つのスピーカ３０、４０が配置されている。２つのスピーカ３０、４０は、例えば、ステアリングホイール８の中心線８ａに対して対称に配置されている。スピーカ３０、４０は、所定の周波数帯域において音を出力できるものであり、車両側からの制御により、例えば、警告音、警告音声等を出力できるものである。 (Speaker arrangement)
As shown in FIG. 1, in the vehicle 5, two speakers 30, 40 are disposed in front of the seat 10, that is, in front of the driver 20 seated in the seat 10. The two speakers 30, 40 are, for example, arranged symmetrically with respect to the center line 8a of the steering wheel 8. The speakers 30 and 40 can output sound in a predetermined frequency band, and can output, for example, a warning sound, a warning sound, and the like by control from the vehicle side.
図１において、車両５の前方から後方に向けて、スピーカから運転者２０の耳の方向をＸ方向、車両５の幅方向をＹ方向、Ｘ軸とＹ軸の外積で定義される方向を車両５の上下方向のＺ方向とする。図１に示すように、右スピーカ３０は、その指向性が運転者２０の右耳２１に向けて強くなるように配置されている。また、左スピーカ４０は、その指向性が運転者２０の左耳２２に向けて強くなるように配置されている。すなわち、スピーカ３０、４０をステアリングホイール８に搭載することにより、右スピーカ３０の出力軸３１が運転者２０の右耳２１の方向になるようにでき、また、左スピーカ４０の出力軸４１が運転者２０の左耳２２の方向になるようにできる。 In FIG. 1, from the front to the rear of the vehicle 5, the direction of the ear of the driver 20 from the speaker is X, the width direction of the vehicle 5 is Y, and the direction defined by the outer product of X and Y axes is The Z direction is the vertical direction of 5. As shown in FIG. 1, the right speaker 30 is disposed such that its directivity is strong toward the right ear 21 of the driver 20. Further, the left speaker 40 is disposed such that the directivity thereof becomes stronger toward the left ear 22 of the driver 20. That is, by mounting the speakers 30, 40 on the steering wheel 8, the output shaft 31 of the right speaker 30 can be directed in the direction of the right ear 21 of the driver 20, and the output shaft 41 of the left speaker 40 operates. In the direction of the left ear 22 of the person 20.
また、図２に示すように、左スピーカ４０を運転者２０の耳に向けてやや上向きに配置する。このために、図２に示すように、Ｘ軸、Ｚ軸がＹ軸の回りに少し回転したＸ、Ｙ、Ｚ軸となっている。 Further, as shown in FIG. 2, the left speaker 40 is disposed slightly upward toward the driver's 20 ear. For this reason, as shown in FIG. 2, the X axis and the Z axis are X, Y and Z axes which are slightly rotated around the Y axis.
図２に示すように、スピーカ３０、４０をステアリングホイール８に搭載することにより、左スピーカ４０の出力軸４１が運転者２０の左耳２２の方向になるように、左スピーカ４０がやや上向き（Ｘ軸方向）に配置される。右スピーカ３０も同様に、やや上向き（Ｘ軸方向）に配置される。これにより、２つのスピーカ３０、４０の指向性が乗員の耳２１、２２に向けて強くなるように配置された構成となる。 As shown in FIG. 2, by mounting the speakers 30, 40 on the steering wheel 8, the left speaker 40 is slightly upward (so that the output shaft 41 of the left speaker 40 is in the direction of the left ear 22 of the driver 20) Is arranged in the X axis direction). Likewise, the right speaker 30 is disposed slightly upward (in the X-axis direction). As a result, the directivity of the two speakers 30 and 40 is arranged to be stronger toward the ears 21 and 22 of the occupant.
（スピーカ３０、４０の配置例１）
図３Ａに示すように、２つのスピーカ３０、４０を、それぞれ、ステアリングホイール８のスポーク部９に備える構成とすることができる。すなわち、ステアリングホイール８の中心線８ａに対して、スポーク部９の右側に右スピーカ３０を配置し、スポーク部９の左側に左スピーカ４０を配置することができる。なお、ステアリングホイール８の中心線８ａとは、ステアリング操作をしていない操舵角ゼロのときにステアリングホイール８の中心を通る線である。右スピーカ３０、左スピーカ４０への右音声信号Ｓ１、左音声信号Ｓ２は、例えば、ステアリングロールコネクタ（図示省略）を介して、車両本体側から入力することができる。 (Example 1 of arrangement of speakers 30, 40)
As shown in FIG. 3A, two speakers 30, 40 may be provided in the spokes 9 of the steering wheel 8, respectively. That is, with respect to the center line 8 a of the steering wheel 8, the right speaker 30 can be disposed on the right side of the spoke portion 9, and the left speaker 40 can be disposed on the left side of the spoke portion 9. The center line 8a of the steering wheel 8 is a line passing through the center of the steering wheel 8 when the steering angle is zero when the steering operation is not performed. The right audio signal S1 and the left audio signal S2 to the right speaker 30 and the left speaker 40 can be input from the vehicle body side via, for example, a steering roll connector (not shown).
（スピーカ３０、４０の配置例２）
図３Ｂに示すように、２つのスピーカ３０、４０を、それぞれ、ステアリングホイール８に設けられるスイッチ装置としてのステアリングスイッチ５０、６０に備える構成とすることができる。すなわち、ステアリングホイール８の中心線８ａに対して、スポーク部９の右側に設けられるステアリングスイッチ５０に右スピーカ３０を配置し、スポーク部９の左側に設けられるステアリングスイッチ６０に左スピーカ４０を配置することができる。ステアリングスイッチ５０、６０は、車両操作に関するスイッチ、空調制御、オーディオ制御、カーナビゲーション操作、等に使用できるスイッチである。２つのスピーカ３０、４０は、ステアリングスイッチ５０、６０と共に、例えば、ステアリングロールコネクタ（図示省略）を介して、車両本体側に電気的に接続することができる。右スピーカ３０、左スピーカ４０への右音声信号Ｓ１、左音声信号Ｓ２は、例えば、ステアリングロールコネクタ（図示省略）を介して、車両本体側から入力することができる。 (Arrangement example 2 of the speakers 30, 40)
As shown in FIG. 3B, two speakers 30, 40 can be provided in the steering switches 50, 60 as switch devices provided on the steering wheel 8, respectively. That is, the right speaker 30 is disposed on the steering switch 50 provided on the right side of the spoke portion 9 with respect to the center line 8 a of the steering wheel 8, and the left speaker 40 is disposed on the steering switch 60 provided on the left side of the spoke portion 9 be able to. The steering switches 50 and 60 are switches that can be used for vehicle operation, air conditioning control, audio control, car navigation operation, and the like. The two speakers 30, 40 can be electrically connected to the vehicle body side together with the steering switches 50, 60, for example, via a steering roll connector (not shown). The right audio signal S1 and the left audio signal S2 to the right speaker 30 and the left speaker 40 can be input from the vehicle body side via, for example, a steering roll connector (not shown).
（スピーカの指向特性）
図４Ａ、図４Ｂで示すスピーカの指向特性は、スピーカの指向性が全方位性を有する場合を示している。図４Ａにおいて、スピーカ３０、４０から出力される音の広がりを示す指向特性は、音波面３６のＸ軸上の点３６ａが最大であり、Ｘ軸上の最大音圧から６ｄＢだけ音圧が低下する３６ｂ、３６ｃの点で規定される開き角を指向角度θと定義する。図４Ａにおいて、Ｙ方向における指向角度はθである。 (Directivity characteristic of speaker)
The directivity characteristics of the speaker shown in FIG. 4A and FIG. 4B show the case where the directivity of the speaker is omnidirectional. In FIG. 4A, the directivity characteristic indicating the spread of the sound output from the speakers 30 and 40 is maximum at point 36a on the X axis of the sound wave surface 36, and the sound pressure is reduced by 6 dB from the maximum sound pressure on the X axis The opening angle defined by the points 36 b and 36 c is defined as the directivity angle θ. In FIG. 4A, the pointing angle in the Y direction is θ.
図４Ｂにおいて、スピーカ３０、４０から出力される音の広がりを示す指向特性は、音波面３６のＸ軸上の点３６ａが最大であり、Ｘ軸上の最大音圧から６ｄＢだけ音圧が低下する３６ｂ、３６ｃの点で規定される開き角を指向角度θと定義する。図４（ｂ）において、Ｚ方向における指向角度はθである。 In FIG. 4B, the directional characteristic indicating the spread of the sound output from the speakers 30 and 40 has the maximum point 36a on the X axis of the sound wave surface 36, and the sound pressure drops by 6 dB from the maximum sound pressure on the X axis The opening angle defined by the points 36 b and 36 c is defined as the directivity angle θ. In FIG. 4B, the directivity angle in the Z direction is θ.
図４Ａ、図４Ｂからわかるように、指向角度はＸ方向、Ｚ方向共にθであるので、図４Ａ、図４Ｂで示すスピーカの指向特性は、全方位性（無指向性）を有するものとなる。このような、全方位性を有するスピーカ３０、４０を、ステアリングホイール８に搭載することにより、車両５の運転に伴うステアリングホイール８の回転操作時においても、スピーカ３０、４０から出力される音の音像の定位が維持されやすい。 As can be seen from FIGS. 4A and 4B, since the directivity angle is θ in both the X direction and the Z direction, the directivity characteristics of the speaker shown in FIGS. 4A and 4B have omnidirectionality (nondirectionality). . By mounting such omnidirectional speakers 30 and 40 on the steering wheel 8, the sound output from the speakers 30 and 40 can be obtained even when the steering wheel 8 is rotated with the operation of the vehicle 5. Localization of the sound image is easy to maintain.
（位置検出部７０）
位置検出部７０は、運転者２０と２つのスピーカ３０、４０の相対位置を検出するものである。この相対位置を検出することにより、スピーカ３０、４０と運転者２０の右耳２１、左耳２２との間の直線距離を算出することができる。この算出は、位置検出部７０内に備えた演算部、例えば、マイコンにより実行することができる。 (Position detection unit 70)
The position detection unit 70 detects the relative position of the driver 20 and the two speakers 30 and 40. By detecting this relative position, the linear distance between the speakers 30, 40 and the right ear 21 and the left ear 22 of the driver 20 can be calculated. This calculation can be performed by an operation unit, for example, a microcomputer, provided in the position detection unit 70.
位置検出部７０は、図２に示すように、例えば、ステアリングホイール８の回転操作に伴う操舵角φを検出する舵角センサとすることが可能である。この舵角センサは、車両５が種々の運転操作に伴う制御を行なうために備える舵角センサと共用することが可能である。 The position detection unit 70 can be, for example, a steering angle sensor that detects a steering angle φ accompanying the rotation operation of the steering wheel 8 as shown in FIG. 2. The steering angle sensor can be shared with a steering angle sensor provided for the vehicle 5 to perform control associated with various driving operations.
位置検出部７０は、舵角センサには限られず、運転者２０と２つのスピーカ３０、４０の相対位置を検出するものであればよい。例えば、インストルメントパネルに搭載されたカメラ（図示省略）、あるいは、ステアリングホイールに搭載されたカメラ（図示省略）等であってもよい。これらのカメラにより撮像された画像に基づいて、例えば、テンプレートマッチング手法により運転者２０の右耳２１、左耳２２の位置を特定すると共に、例えば、ステアリングホイール８のスポーク部９の位置を検出することにより、運転者２０と２つのスピーカ３０、４０との相対位置を検出することができる。 The position detection unit 70 is not limited to the steering angle sensor, and may be any device that detects the relative position of the driver 20 and the two speakers 30 and 40. For example, a camera (not shown) mounted on an instrument panel or a camera (not shown) mounted on a steering wheel may be used. Based on the images taken by these cameras, for example, the positions of the right ear 21 and the left ear 22 of the driver 20 are specified by a template matching method, and the position of the spokes 9 of the steering wheel 8 is detected. Thus, the relative position between the driver 20 and the two speakers 30, 40 can be detected.
（制御部による音像の定位制御）
制御部１００は、図１に示すように、右スピーカ３０を駆動する駆動部１１０、左スピーカ４０を駆動する駆動部１２０を備えている。駆動部１１０は、右音声信号Ｓ１と、左音声信号Ｓ２の位相調整信号Ｓ２１を加算して、増幅して右スピーカ３０を駆動する。同様に、駆動部１２０は、左音声信号Ｓ２と、右音声信号Ｓ１の位相調整信号Ｓ１２を加算して、増幅して左スピーカ４０を駆動する。 (Localization control of sound image by control unit)
As shown in FIG. 1, the control unit 100 includes a drive unit 110 that drives the right speaker 30 and a drive unit 120 that drives the left speaker 40. The driving unit 110 adds the right audio signal S1 and the phase adjustment signal S21 of the left audio signal S2 and amplifies the same to drive the right speaker 30. Similarly, the drive unit 120 adds the left audio signal S2 and the phase adjustment signal S12 of the right audio signal S1 and amplifies the same to drive the left speaker 40.
位相調整回路１１５は、右音声信号Ｓ１の位相を調整（位相遅延）して、駆動部１２０に位相調整信号Ｓ１２を出力する。位相調整は、右音声信号Ｓ１と位相調整信号Ｓ１２の位相差α°として適宜設定可能である。 The phase adjustment circuit 115 adjusts the phase of the right audio signal S1 (phase delay), and outputs the phase adjustment signal S12 to the drive unit 120. The phase adjustment can be appropriately set as the phase difference α ° between the right audio signal S1 and the phase adjustment signal S12.
同様に、位相調整回路１２５は、左音声信号Ｓ２の位相を調整（位相遅延）して、駆動部１１０に位相調整信号Ｓ２１を出力する。位相調整は、左音声信号Ｓ２と位相調整信号Ｓ２１の位相差α°として適宜設定可能である。なお、この位相差α°の設定は、２つのスピーカ３０、４０が座席１０の中心線１１を挟んで対称に配置されている場合であり、スピーカ３０、４０が座席１０の中心線１１を挟んで非対称に配置されている場合等は、位相調整回路１１５と位相調整回路１２５で設定される位相差は異なる値とすることができる。 Similarly, the phase adjustment circuit 125 adjusts the phase of the left audio signal S2 (phase delay), and outputs the phase adjustment signal S21 to the drive unit 110. The phase adjustment can be appropriately set as the phase difference α ° between the left audio signal S2 and the phase adjustment signal S21. The setting of the phase difference α ° is a case where the two speakers 30, 40 are arranged symmetrically with respect to the center line 11 of the seat 10, and the speakers 30, 40 sandwich the center line 11 of the seat 10. The phase difference set by the phase adjustment circuit 115 and the phase adjustment circuit 125 can be set to different values when they are arranged asymmetrically.
上記説明した駆動部１１０、１２０、位相調整回路１１５、１２５は、それぞれ、ゲインの調整が可能である。したがって、図１で示すように、駆動部１１０における右音声信号Ｓ１と位相調整信号Ｓ２１の加算割合、駆動部１２０における左音声信号Ｓ２と位相調整信号Ｓ１２の加算割合を調節できる。また、右スピーカ３０、左スピーカ４０から出力される音圧を調節でき、左右のステレオ音のバランスを調節することもできる。 Each of the drive units 110 and 120 and the phase adjustment circuits 115 and 125 described above can adjust the gain. Therefore, as shown in FIG. 1, the addition ratio of the right audio signal S1 and the phase adjustment signal S21 in the drive unit 110 and the addition ratio of the left audio signal S2 and the phase adjustment signal S12 in the drive unit 120 can be adjusted. Moreover, the sound pressure output from the right speaker 30 and the left speaker 40 can be adjusted, and the balance between the left and right stereo sounds can also be adjusted.
制御部１００は、２つのスピーカ３０、４０から出力される音による立体音像が維持されるように各スピーカから出力される音の特性を制御する。 The control unit 100 controls the characteristics of the sound output from each of the speakers so that the three-dimensional sound image of the sounds output from the two speakers 30 and 40 is maintained.
右耳２１には、右スピーカ３０から出力される右チャンネルの音Ｓ３０と左チャンネルの位相調整された音Ｓ４０ｄが到達すると共に、左スピーカ４０から出力される左チャンネルの音Ｓ４０と右チャンネルの位相調整された音Ｓ３０ｄが到達する。 The right ear 21 receives the sound S30 of the right channel output from the right speaker 30 and the phase-adjusted sound S40d of the left channel, and the sound S40 of the left channel output from the left speaker 40 and the phase of the right channel The adjusted sound S30d arrives.
右耳２１に到達する右チャンネルの音は、右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄである。 The sound of the right channel that reaches the right ear 21 is the sound S30 of the right channel and the phase-adjusted sound S30d of the right channel.
また、右耳２１に到達する左チャンネルの音は、左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄである。 Further, the sound of the left channel reaching the right ear 21 is the sound S40 of the left channel and the sound S40d of which the phase is adjusted in the left channel.
したがって、制御部１００は、右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄの合成音が最大となり、左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄの合成音が最小となるように制御する。 Therefore, the control unit 100 determines that the synthesized sound of the sound S30 of the right channel and the phase-adjusted sound S30d of the right channel is the largest, and the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d is the smallest. Control to be
右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄの合成音が右耳２１において最大となるようにするには、例えば、制御部１００は、距離Ｌ１１を進む音Ｓ３０と距離Ｌ２１を進む音Ｓ３０ｄとの位相差が、２πｎ（ｎ＝０、１、２・・・）となるように位相差α°を設定する。なお、距離Ｌ１１は、右スピーカ３０から右耳２１までの距離、距離Ｌ２１は、左スピーカ４０から右耳２１までの距離である。 For the synthesized sound of the right channel sound S30 and the right channel phase-adjusted sound S30d to be maximum at the right ear 21, for example, the control unit 100 proceeds to the sound S30 traveling on the distance L11 and the distance L21. The phase difference α ° is set so that the phase difference with the sound S30 d is 2πn (n = 0, 1, 2...). A distance L11 is a distance from the right speaker 30 to the right ear 21, and a distance L21 is a distance from the left speaker 40 to the right ear 21.
左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄの合成音が右耳２１において最小となるようにするには、距離Ｌ２１を進む音Ｓ４０と距離Ｌ１１を進む音Ｓ４０ｄとの位相差が、πｎ（ｎ＝０、１、２・・・）となるように位相差α°を設定する。 In order for the synthetic sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel to be minimum in the right ear 21, the phase difference between the sound S40 traveling on the distance L21 and the sound S40d traveling on the distance L11 is , .Pi.n (n = 0, 1, 2,...) Are set.
上記示した左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄの合成音が右耳２１において最小となるように設定することにより、右耳２１の位置において、右チャンネルの音Ｓ３０と左チャンネルの音Ｓ４０のクロストークが低減あるいは相殺される。 By setting the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel to be minimum at the right ear 21, the sound S30 of the right channel and the left sound can be detected at the position of the right ear 21. Cross talk of the channel sound S40 is reduced or canceled.
同様にして、左耳２２には、左スピーカ４０から出力される左チャンネルの音Ｓ４０と右チャンネルの位相調整された音Ｓ３０ｄが到達すると共に、右スピーカ３０から出力される右チャンネルの音Ｓ３０と左チャンネルの位相調整された音Ｓ４０ｄが到達する。 Similarly, the left ear 22 receives the sound S40 of the left channel output from the left speaker 40 and the phase-adjusted sound S30d of the right channel, and the sound S30 of the right channel output from the right speaker 30 The phase-adjusted sound S40d of the left channel arrives.
左耳２２に到達する左チャンネルの音は、左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄである。 The sound of the left channel reaching the left ear 22 is the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel.
また、左耳２２に到達する右チャンネルの音は、右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄである。 The sound of the right channel reaching the left ear 22 is the sound S30 of the right channel and the sound S30d of which the phase of the right channel is adjusted.
したがって、制御部１００は、左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄの合成音が最大となり、右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄの合成音が最小となるように制御する。 Therefore, the control unit 100 determines that the synthesized sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel is the largest, and the synthesized sound of the sound S30 of the right channel and the phase-adjusted sound S30d is the smallest. Control to be
左チャンネルの音Ｓ４０と左チャンネルの位相調整された音Ｓ４０ｄの合成音が左耳２２において最大となるようにするには、例えば、制御部１００は、距離Ｌ２２を進む音Ｓ４０と距離Ｌ１２を進む音Ｓ４０ｄの位相差が、２πｎ（ｎ＝０、１、２・・・）となるように位相差α°を設定する。なお、距離Ｌ２２は、左スピーカ４０から左耳２２までの距離、距離Ｌ１２は、右スピーカ３０から左耳２２までの距離である。 In order for the synthetic sound of the sound S40 of the left channel and the phase-adjusted sound S40d of the left channel to be maximum at the left ear 22, for example, the control unit 100 proceeds the sound S40 traveling on the distance L22 and the distance L12. The phase difference α ° is set so that the phase difference of the sound S40d is 2πn (n = 0, 1, 2...). The distance L22 is the distance from the left speaker 40 to the left ear 22, and the distance L12 is the distance from the right speaker 30 to the left ear 22.
右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄの合成音が左耳２２において最小となるようにするには、距離Ｌ１２を進む音Ｓ３０と距離Ｌ２２を進む音Ｓ３０ｄの位相差が、πｎ（ｎ＝０、１、２・・・）となるように位相差α°を設定する。 In order to minimize the synthesized sound of the right channel sound S30 and the right channel phase adjusted sound S30d at the left ear 22, the phase difference between the sound S30 traveling on the distance L12 and the sound S30d traveling on the distance L22 is The phase difference α ° is set to be π n (n = 0, 1, 2...).
上記示した右チャンネルの音Ｓ３０と右チャンネルの位相調整された音Ｓ３０ｄの合成音が左耳２２において最小となるように設定することにより、左耳２２の位置において、左チャンネルの音Ｓ４０と右チャンネルの音Ｓ３０のクロストークが低減あるいは相殺される。 By setting the synthesized sound of the sound S30 of the right channel and the phase-adjusted sound S30d of the right channel to be minimum at the left ear 22, the sound S40 of the left channel and the right at the position of the left ear 22 Cross talk of the channel sound S30 is reduced or canceled.
上記示した制御部１００による位相調整により、耳元に音を定位させることができ、２つのスピーカから出力される音による立体音像が維持されるように制御することができる。 By the above-described phase adjustment by the control unit 100, the sound can be localized at the ear, and control can be performed such that a three-dimensional sound image by the sounds output from the two speakers is maintained.
（ステアリング操舵角φの場合）
図５に示すように、ステアリングホイール８が回転操作されて操舵角φが検出された場合は、２つのスピーカと乗員（運転者）との位置関係が変化する。上記説明した右スピーカ３０から右耳２１までの距離Ｌ１１は、操舵角φにより変化する関数Ｌ１１（φ）で表すことができる。同様に、左スピーカ４０から左耳２２までの距離Ｌ２２は、関数Ｌ２２（φ）で表すことができる。また、右スピーカ３０から左耳２２までの距離Ｌ１２は関数Ｌ１２（φ）、左スピーカ４０から右耳２１までの距離Ｌ２１は関数Ｌ２１（φ）で表すことができる。 (In the case of steering angle φ)
As shown in FIG. 5, when the steering wheel 8 is rotated and the steering angle φ is detected, the positional relationship between the two speakers and the occupant (driver) changes. The distance L11 from the right speaker 30 to the right ear 21 described above can be expressed by a function L11 (φ) that changes with the steering angle φ. Similarly, the distance L22 from the left speaker 40 to the left ear 22 can be represented by a function L22 (φ). Further, the distance L12 from the right speaker 30 to the left ear 22 can be represented by a function L12 (φ), and the distance L21 from the left speaker 40 to the right ear 21 can be represented by a function L21 (φ).
関数Ｌ１１（φ）、Ｌ２２（φ）、Ｌ１２（φ）、Ｌ２１（φ）は、位置検出部７０に予め記憶された操舵角φと各距離のテーブル値により算出することができる。あるいは、操舵角φに基づいて各スピーカ３０、４０と右耳２１、左耳２２までの直線距離を３次元的に計算して算出することもできる。 The functions L11 (φ), L22 (φ), L12 (φ), and L21 (φ) can be calculated from the steering angle φ stored in advance in the position detection unit 70 and the table values of the respective distances. Alternatively, the linear distances to the speakers 30, 40 and the right ear 21 and the left ear 22 can be three-dimensionally calculated and calculated based on the steering angle φ.
（操舵角φが－９０°から９０°の範囲の場合）
操舵角φが－９０°から９０°の範囲の場合は、上記説明した制御部１００による音像の定位制御において、右スピーカ３０から右耳２１までの距離Ｌ１１、左スピーカ４０から左耳２２までの距離Ｌ２２、右スピーカ３０から左耳２２までの距離Ｌ１２、左スピーカ４０から右耳２１までの距離Ｌ２１を、それぞれ、操舵角φの関数Ｌ１１（φ）、Ｌ２２（φ）、Ｌ１２（φ）、Ｌ２１（φ）として制御すればよい。 (When the steering angle φ is in the range of -90 ° to 90 °)
When the steering angle φ is in the range of -90 ° to 90 °, the distance L11 from the right speaker 30 to the right ear 21 and the distance from the left speaker 40 to the left ear 22 in sound localization control by the control unit 100 described above. The distance L22, the distance L12 from the right speaker 30 to the left ear 22, and the distance L21 from the left speaker 40 to the right ear 21 are functions L11 (φ), L22 (φ), L12 (φ) of the steering angle φ, respectively. It may be controlled as L21 (φ).
（操舵角φが９０°を超える場合）
操舵角φが９０°を超える場合、あるいは、さらに１回転した場合等においては、右チャンネルの音Ｓ３０と左チャンネルの音Ｓ４０の定位が入れ替わることになる。したがって、このように、右チャンネルの音Ｓ３０と左チャンネルの音Ｓ４０の定位が入れ替わるようなステアリングの操作がされた場合は、図１、図５において、右音声信号Ｓ１と左音声信号Ｓ２の入力を入れ替えた状態で、制御部１００による音像の定位制御を行なう。 (When the steering angle φ exceeds 90 °)
When the steering angle φ exceeds 90 °, or when the steering angle φ is rotated one more time, the localization of the sound S30 in the right channel and the sound S40 in the left channel is switched. Therefore, when the steering operation is performed such that the localization of the sound S30 of the right channel and the sound S40 of the left channel is interchanged in this way, the input of the right audio signal S1 and the left audio signal S2 in FIGS. The control unit 100 controls the localization of the sound image in a state in which
本発明の実施の形態は、上記示した２つのスピーカに限られず、３以上のスピーカが座席１０の中心線１１を挟んで配置される場合にも適用可能である。すなわち、各スピーカから出力される音のスピーカから乗員の耳までの距離と位相差とを考慮し、右耳、左耳それぞれにおいて、合成音が最大、最小になるように位相差を設定することにより、右チャンネルの音と左チャンネルの音のクロストークが低減あるいは相殺される。これにより、３以上のスピーカの場合においても、耳元に音を定位させることができ、３つ以上のスピーカから出力される音による立体音像が維持されるように制御することができる。 The embodiment of the present invention is not limited to the two speakers shown above, and is applicable to the case where three or more speakers are arranged with the center line 11 of the seat 10 interposed therebetween. That is, in consideration of the distance from the speaker of the sound output from each speaker to the occupant's ear and the phase difference, the phase difference should be set so that the synthesized sound is maximum and minimum in each of the right and left ears. The crosstalk between the sound of the right channel and the sound of the left channel is reduced or canceled out. Thus, even in the case of three or more speakers, sound can be localized at the ear, and control can be performed so that a three-dimensional sound image by sounds output from three or more speakers is maintained.
（実施の形態の効果）
本発明の実施の形態によれば、以下のような効果を有する。
（１）本発明の実施の形態に係る音響装置１は、車両５に搭載される音響装置１であって、座席１０に着座した乗員である運転者２０の正面よりも前側において座席１０の中心線１１を挟むように配置された２つのスピーカ３０、４０と、運転者２０と２つのスピーカ３０、４０の相対位置を検出する位置検出部７０と、位置検出部７０で検出された相対位置に基づいて、２つのスピーカ３０、４０から出力される音による立体音像が維持されるように各スピーカから出力される音の特性を制御する制御部１００と、を備えて構成されている。運転者２０と２つのスピーカ３０、４０の相対位置を検出する位置検出部７０を備えているので、ステアリングホイールが回転操作されて乗員（運転者）とスピーカとの相対位置が変化した場合であっても立体音像を維持できる。
（２）位置検出部７０を備えているので、ステアリングホイールが回転操作されて、右チャンネルの音Ｓ３０と左チャンネルの音Ｓ４０の定位が入れ替わる場合においても、乗員（運転者）の耳に定位する立体音像を維持するように制御可能である。
（３）スピーカ３０、４０の指向性を全方位性（無指向性）のものとすることにより、車両５の運転に伴うステアリングホイール８の回転操作時においても、スピーカから出力される音の音像の定位が維持されやすい。
（４）各スピーカは、ステアリングホイール８のスポーク部９に備える構成とすることができ、また、ステアリングホイール８に設けられるスイッチ装置としてのステアリングスイッチ５０、６０に備える構成とすることもできる。各スピーカをステアリングスイッチ５０、６０に備える構成とすることにより、ステアリングホイールに搭載するスイッチ装置において音声報知手段を備えることが可能となり、ステアリングスイッチの機能拡充が可能となる。
（５）制御部１００による音像の定位制御が可能であり、特に、スピーカ３０、４０の指向性を全方位性（無指向性）のものとすることにより、ステアリングホイールに搭載したスピーカからの出力音を乗員（運転者）の耳元に安定して定位させることができる。 (Effect of the embodiment)
According to the embodiment of the present invention, the following effects are obtained.
(1) The acoustic device 1 according to the embodiment of the present invention is the acoustic device 1 mounted on the vehicle 5 and is located at the center of the seat 10 on the front side of the driver 20 who is an occupant seated in the seat 10. At the relative position detected by the position detection unit 70, the position detection unit 70 that detects the relative position of the two speakers 30, 40 arranged so as to sandwich the line 11, the driver 20 and the two speakers 30, 40 Based on this, the control unit 100 is configured to control the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image of the sound output from the two speakers 30 and 40 is maintained. Since the position detection unit 70 for detecting the relative position of the driver 20 and the two speakers 30 and 40 is provided, the steering wheel is rotated and the relative position between the passenger (driver) and the speaker changes. However, it can maintain a three-dimensional sound image.
(2) Since the position detection unit 70 is provided, even when the steering wheel is rotated and the localization of the sound S30 in the right channel and the sound S40 in the left channel is interchanged, localization is made to the ears of the occupant (driver) It is controllable to maintain a three-dimensional sound image.
(3) By making the directivity of the speakers 30, 40 omnidirectional (nondirectional), the sound image of the sound output from the speakers even at the time of the rotation operation of the steering wheel 8 accompanying the driving of the vehicle 5 It is easy to maintain the
(4) Each speaker can be provided in the spokes 9 of the steering wheel 8 or can be provided in the steering switches 50 and 60 as switch devices provided in the steering wheel 8. By providing the speakers in the steering switches 50 and 60, the switch device mounted on the steering wheel can be provided with an audio notification means, and the functions of the steering switch can be expanded.
(5) The localization control of the sound image by the control unit 100 is possible, and in particular, by making the directivity of the speakers 30, 40 omnidirectional (nondirectional), the output from the speaker mounted on the steering wheel Sound can be stably localized at the ear of a passenger (driver).
以上、本発明のいくつかの実施の形態を説明したが、これらの実施の形態は、一例に過ぎず、請求の範囲に係る発明を限定するものではない。また、これら新規な実施の形態は、その他の様々な形態で実施されることが可能であり、本発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更等を行うことができる。また、これら実施の形態の中で説明した特徴の組合せの全てが発明の課題を解決するための手段に必須であるとは限らない。さらに、これら実施の形態は、発明の範囲及び要旨に含まれるとともに、請求の範囲に記載された発明とその均等の範囲に含まれる。 Although some embodiments of the present invention have been described above, these embodiments are merely examples, and do not limit the claimed invention. Moreover, these novel embodiments can be implemented in other various forms, and various omissions, replacements, changes, and the like can be made without departing from the scope of the present invention. Further, not all combinations of the features described in the embodiments are essential to the means for solving the problems of the invention. Furthermore, these embodiments are included in the scope and subject matter of the invention, and included in the invention described in the claims and the equivalents thereof.
１ 音響装置
５ 車両
８ ステアリングホイール
８ａ 中心線
２０ 運転者
２１ 右耳
２２ 左耳
３０ スピーカ
４０ 左スピーカ
５０、６０ ステアリングスイッチ
７０ 位置検出部
１００ 制御部
１１０ 駆動部
１１５ 位相調整回路
１２０ 駆動部
１２５ 位相調整回路  Reference Signs List 1 acoustic device 5 vehicle 8 steering wheel 8a center line 20 driver 21 right ear 22 left ear 30 speaker 40 left speaker 50, 60 steering switch 70 position detection unit 100 control unit 110 drive unit 115 phase adjustment circuit 120 drive unit 125 phase adjustment circuit

Claims (10)

  1. 車両に搭載される音響装置であって、
    座席に着座した乗員の正面よりも前側において前記座席の中心線を挟むように配置された少なくとも２つのスピーカと、
    前記乗員と前記少なくとも２つのスピーカの相対位置を検出する位置検出部と、
    位置検出部で検出された前記相対位置に基づいて、前記少なくとも２つのスピーカから出力される音による立体音像が維持されるように各スピーカから出力される音の特性を制御する制御部と、
    を備える音響装置。     An acoustic device mounted on a vehicle,
    At least two speakers arranged to sandwich the center line of the seat in front of the front of the occupant seated in the seat;
    A position detection unit that detects the relative position of the occupant and the at least two speakers;
    A control unit configured to control characteristics of the sound output from each of the speakers so as to maintain a three-dimensional sound image of the sounds output from the at least two speakers based on the relative position detected by the position detection unit;
    An acoustic device comprising
  2. 前記少なくとも２つのスピーカは、前記車両のステアリングホイールに設けられている、請求項１に記載の音響装置。 The acoustic device according to claim 1, wherein the at least two speakers are provided on a steering wheel of the vehicle.
  3. 前記少なくとも２つのスピーカは、前記ステアリングホイールの中心線に対して対称に配置されている、請求項１又は２に記載の音響装置。 The acoustic device according to claim 1, wherein the at least two speakers are arranged symmetrically with respect to a center line of the steering wheel.
  4. 前記少なくとも２つのスピーカは、それぞれのスピーカの出力の指向性が全方位である、請求項１から３のいずれか１項に記載の音響装置。 The acoustic device according to any one of claims 1 to 3, wherein the directivity of the output of each of the at least two speakers is omnidirectional.
  5. 前記少なくとも２つのスピーカは、ステアリングホイールに設けられるスイッチ装置に備えられている、請求項１から４のいずれか１項に記載の音響装置。 The acoustic device according to any one of claims 1 to 4, wherein the at least two speakers are provided in a switch device provided on a steering wheel.
  6. 前記制御部は、前記少なくとも２つのスピーカのうち、前記中心線に対して右側に配置されるスピーカに対応する、右チャンネルの音声信号、及び前記少なくとも２つのスピーカのうち、前記中心線に対して左側に配置されるスピーカに対応する、左チャンネルの音声信号に対して、前記相対位置に応じた位相遅延処理を行う位相調整手段と、前記右チャンネルの前記音声信号と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号、及び前記左チャンネルの前記音声信号と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号をそれぞれ加算して左右のチャンネルの駆動信号を出力する加算手段を備えた、請求項１から５のいずれか１項に記載の音響装置。 The control unit is configured to control an audio signal of a right channel corresponding to a speaker disposed on the right side with respect to the center line among the at least two speakers and the center line among the at least two speakers. Phase adjustment means for performing phase delay processing according to the relative position to the audio signal of the left channel corresponding to the speaker disposed on the left side, the audio signal of the right channel and the phase adjustment means Adding the voice signal of the left channel, the voice signal of the left channel, and the voice signal of the right channel delayed in phase by the phase adjustment unit, and outputting drive signals of left and right channels An acoustic device according to any one of the preceding claims, comprising means.
  7. 前記制御部は、前記乗員の前記右耳において、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との合成音が最大となり、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との合成音が最小となるように、かつ、前記乗員の前記左耳において、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との合成音が最大となり、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との合成音が最小となるように、前記位相調整手段における位相差をそれぞれ設定する、請求項６に記載の音響装置。 In the right ear of the passenger, the control unit maximizes the synthesized sound of the sound based on the audio signal of the right channel and the sound based on the audio signal of the right channel delayed in phase by the phase adjustment unit. A synthetic sound of the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed in phase by the phase adjustment means is minimized, and the left ear of the occupant At the maximum, the synthetic sound of the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed in phase by the phase adjustment means is maximized, and the sound based on the audio signal of the right channel And the synthesized sound with the sound based on the audio signal of the right channel phase-delayed by the phase adjustment means, Respectively set the phase difference in the phase adjusting means, acoustic device according to claim 6.
  8. 前記制御部は、前記乗員の前記右耳において、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との位相差が２πｎ（ｎ＝０、１、２・・・）となり、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との位相差がπｎ（ｎ＝０、１、２・・・）となるように、かつ、前記乗員の前記左耳において、前記左チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記左チャンネルの前記音声信号に基づく音との位相差が２πｎ（ｎ＝０、１、２・・・）となり、前記右チャンネルの前記音声信号に基づく音と前記位相調整手段によって位相遅延された前記右チャンネルの前記音声信号に基づく音との位相差がπｎ（ｎ＝０、１、２・・・）となるように、前記位相調整手段における位相差をそれぞれ設定する、請求項９に記載の音響装置。 In the right ear of the occupant, a phase difference between a sound based on the audio signal of the right channel and a sound based on the audio signal of the right channel delayed by the phase adjustment unit is 2πn n = 0, 1, 2,...), and the phase difference between the sound based on the audio signal of the left channel and the sound based on the audio signal of the left channel delayed by the phase adjustment means is πn ( n = 0, 1, 2, ...), and at the left ear of the occupant, a sound based on the audio signal of the left channel and the phase-delayed sound of the left channel by the phase adjustment means. The phase difference with the sound based on the audio signal is 2π n (n = 0, 1, 2,...), And the phase based delaying is performed by the sound based on the audio signal of the right channel and the phase adjusting means 10. The phase difference in the phase adjusting means is set such that the phase difference with the sound based on the sound signal of the right channel is π n (n = 0, 1, 2...). Sound equipment.
  9. 前記位置検出部は、前記ステアリングホイールの回転操作に伴う操舵角を検出する舵角センサと、前記操舵角と前記少なくとも２つのスピーカから前記乗員の右耳及び左耳までの各距離との関係を予め記憶した記憶部を有し、前記舵角センサが検出した前記操舵角に基づいて、前記記憶部から前記相対位置として前記少なくとも２つのスピーカから前記乗員の右耳及び左耳までの前記各距離を算出する、請求項１から８のいずれか１項に記載の音響装置。 The position detection unit is configured to detect a steering angle sensor for detecting a steering angle associated with a rotation operation of the steering wheel, and a relationship between the steering angle and each distance from the at least two speakers to the right ear and the left ear of the occupant. The distance between the at least two speakers and the right and left ears of the occupant as the relative position from the storage unit based on the steering angle detected by the steering angle sensor. The acoustic device according to any one of claims 1 to 8, which calculates
  10. 前記制御部は、前記舵角センサが検出した前記操舵角が９０°を超える場合、あるいはさらに前記ステアリングホイールが１回転した場合、前記右チャンネルの前記音声信号と前記左チャンネルの前記音声信号を入れ替える、請求項９に記載の音響装置。 The control unit interchanges the audio signal of the right channel and the audio signal of the left channel when the steering angle detected by the steering angle sensor exceeds 90 ° or when the steering wheel rotates one more rotation. The acoustic device according to claim 9.
PCT/JP2018/033274 2017-09-19 2018-09-07 Acoustic device WO2019059006A1 (en)

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