WO2019059004A1 - Acoustic device - Google Patents

Acoustic device Download PDF

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Publication number
WO2019059004A1
WO2019059004A1 PCT/JP2018/033270 JP2018033270W WO2019059004A1 WO 2019059004 A1 WO2019059004 A1 WO 2019059004A1 JP 2018033270 W JP2018033270 W JP 2018033270W WO 2019059004 A1 WO2019059004 A1 WO 2019059004A1
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WO
WIPO (PCT)
Prior art keywords
sound
speakers
phase
audio signal
channel
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PCT/JP2018/033270
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French (fr)
Japanese (ja)
Inventor
正則 小杉
貴史 長尾
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株式会社東海理化電機製作所
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Publication of WO2019059004A1 publication Critical patent/WO2019059004A1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00—Stereophonic arrangements
    • H04R5/02—Spatial or constructional arrangements of loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S1/00—Two-channel systems

Definitions

  • the present invention relates to an acoustic device.
  • a vehicle-mounted stereophonic sound device there is a technique of generating a stereophonic sound image by the output sound from the main speakers disposed on the left and the rear of the occupant (driver) and the sub-speaker disposed in the front of the occupant (for example, Patent Document 1).
  • a left speaker is disposed on the left side of a shoulder portion of a backrest portion of a driver's seat toward the front of the vehicle
  • a right speaker is disposed on the right side of the shoulder portion toward the front of the vehicle.
  • the configuration is shown in which the sub-speaker is disposed in front of the occupant, such as a lower portion of a steering column or a dashboard.
  • Patent Document 1 Generally, there are individual differences in the height of the occupant, but the acoustic device disclosed in Patent Document 1 has a difference in the characteristics of the sound reaching the occupant's ear from each speaker due to the individual difference in height. There is a possibility that the sound produced by the occupant does not become a three-dimensional sound image.
  • An object of the present invention is to provide an acoustic device capable of making a sound felt by a passenger a three-dimensional sound image regardless of the individual difference in height.
  • 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, and output from the at least two speakers
  • a control unit for controlling the characteristics of the sound output from each of the speakers so as to maintain a three-dimensional sound image of the sound, and the at least two speakers have directivity of the at least two speakers of the occupant
  • An acoustic device that is positioned to be strong towards the ear.
  • the speakers disposed on the right side with respect to the center line are arranged such that the directivity is strong toward the right ear of the occupant, and the at least two speakers
  • Any one of the above [1] to [3], wherein the at least two speakers are disposed upward with a predetermined angle such that the output axis is in the direction of the occupant's ear The acoustic device according to 1.
  • the acoustic device according to any one of the above [1] to [4], wherein the at least two speakers are disposed in an instrument panel.
  • the acoustic device according to any one of [1] to [5], wherein the directivity of the output of each of the at least two speakers is omnidirectional.
  • 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 adjustment means for performing phase delay processing on the audio signal of the left channel corresponding to the speaker disposed on the left with respect to the left side, the audio signal of the right channel and the left phase delayed by the phase adjustment means
  • the audio signal of the channel, and the audio signal of the left channel and the audio signal of the right channel delayed in phase by the phase adjusting means are respectively added to each other to output driving signals of the left and right channels.
  • the acoustic device according to any one of the above [1] to [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 [8].
  • an acoustic device in which the sound felt by the occupant is a three-dimensional sound image regardless of the individual difference in height.
  • 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 an explanatory view showing directivity characteristics in the XY plane in which the directivity characteristics of the speaker are in a narrow range in the direction of the vehicle height when the speakers have directivity in the orthogonal direction.
  • FIG. 3B is an explanatory view showing the directivity in the XZ plane in which the directivity of the speaker is wide in the direction of the vehicle height when the loudspeaker has directivity in the orthogonal direction.
  • FIG. 3A is an explanatory view showing directivity characteristics in the XY plane in which the directivity characteristics of the speaker are in a narrow range in the direction of the vehicle height when the speakers have directivity in the orthogonal direction.
  • FIG. 3B is an explanatory view showing the
  • 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 side view corresponding to FIG. 2 and showing that the position of the driver's ear changes due to the height adjustment of the seat in the height direction and the height and lowness of the driver sitting on the seat .
  • 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. Control for controlling the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image by the sounds output from the two speakers 30 and 40 and the two speakers 30 and 40 arranged so as to be held is maintained.
  • the two speakers 30 and 40 are disposed and configured such that the directivity of the two speakers 30 and 40 becomes stronger toward the ears 21 and 22 of the occupant.
  • the driver is the driver 20.
  • two speakers 30 and 40 will be described as being disposed symmetrically with respect to the center line 11 of the seat 10.
  • 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 disposed, for example, on the instrument panel 7.
  • 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, the output shaft 31 of the right speaker 30 is mounted in the direction of the right ear 21 of the driver 20 and the output shaft 41 of the left speaker 40 is mounted in the direction of the left ear 22 of the driver 20 It is done.
  • 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 disposed slightly upward (in the X-axis direction) such that the output shaft 41 of the left speaker 40 is in the direction of the left ear 22 of the driver 20.
  • 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.
  • the directivity characteristics of the speaker shown in FIG. 3A and FIG. 3B show cases where the directivity characteristics in the X direction and the Z direction are different.
  • the directional characteristic indicating the spread of the sound output from the speakers 30 and 40 has a maximum point 35a on the X axis of the sound wave surface 35, and the sound pressure drops by 6 dB from the maximum sound pressure on the X axis
  • the opening angle defined by the points 35b and 35c is defined as the directivity angle ⁇ 2.
  • the directivity angle in the Y direction is ⁇ 2.
  • 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 36b and 36c is defined as the directivity angle .theta.1.
  • the directivity angle in the Z direction is ⁇ 1.
  • the pointing angle is ⁇ 1> ⁇ 2.
  • the directivity angle is ⁇ 1> ⁇ 2
  • the directivity characteristics of the speakers shown in FIGS. 3A and 3B are in a wide range in the Z direction, that is, the direction of the height of the vehicle 5. .
  • 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 36b and 36c is defined as the directivity angle .theta.1.
  • the directivity angle in the Y direction is ⁇ 1.
  • 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 36b and 36c is defined as the directivity angle .theta.1.
  • the directivity angle in the Z direction is ⁇ 1.
  • FIG. 3A and FIG. 3B The case where the speakers 30 and 40 shown in FIG. 3A and FIG. 3B are arranged on the instrument panel 7 in a predetermined direction is shown in FIG.
  • one of the speakers 30 and 40 shown in FIG. 3B with the larger directivity angle (directivity angle ⁇ 1) is disposed as the Z-axis direction and the direction of the vehicle height.
  • the directivity is arranged in a wide range in the direction of the vehicle height.
  • the smaller directional angle (directional angle ⁇ 2) of the speakers 30, 40 shown in FIG. 3A is disposed as the Y-axis direction and the direction of the vehicle width.
  • the positions of the ears 21 and 22 of the driver 20 change due to the height adjustment of the seat 10 in the vehicle height direction and the height and lowness of the driver 20 sitting on the seat 10. Therefore, by arranging the directivity of the speakers 30, 40 to be in a wide range in the direction of the vehicle height, the directivity of the speakers 30, 40 is arranged to be stronger toward the ears 21, 22 of the occupant. The sound can be stably localized at the ear of the driver 20.
  • 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 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 characteristics of the sound output from each of the speakers 30, 40 are maintained so as to maintain a three-dimensional sound image by the two speakers 30, 40 arranged so as to sandwich the line 11 and the sounds output from the two speakers 30, 40.
  • the two speakers 30, 40 are arranged and configured such that the directivity of the two speakers 30, 40 becomes stronger toward the ears 21, 22 of the occupant.
  • the directivity of the speaker can be configured to be strong toward the occupant's ear.
  • the directivity of the loudspeakers is omnidirectional, as described above, by arranging the output axis of each loudspeaker in the direction of the occupant's (driver's) ear, the directivity of the loudspeakers is improved. It can be configured to be strong towards the occupant's ear.
  • the larger directional angle (directional angle ⁇ 1) of the loudspeaker is disposed as the Z axis direction and the direction of the vehicle height.
  • the directivity can be arranged in a wide range in the direction of the vehicle height.
  • the position of the occupant's (driver's) ear changes due to the height adjustment of the seat in the vehicle height direction and the height and lowness of the occupant (driver's) seated in the seat. Therefore, by arranging the directivity of the speaker to be in a wide range in the direction of the vehicle height, the directivity of the speaker can be configured to be stronger toward the occupant's ear. Thereby, the sound can be stably localized at the ear of the occupant (driver).
  • the distance from the speaker to the ear of the occupant (driver) is It is necessary to set the phase difference in consideration.
  • Reference Signs List 1 acoustic device 5 vehicle 7 instrument panel 10 seat 11 center line 20 driver 21 right ear 22 left ear 30 right speaker 40 left speaker 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)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Stereophonic System (AREA)

Abstract

An acoustic device 1 mounted in a vehicle 5 and comprising: 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; and a control unit 100 that controls the characteristics of sound output from each speaker 30, 40, so as to maintain a stereophonic sound image caused by sound output from the two speakers 30, 40. The two speakers 30, 40 are arranged such that the directionality of the two speakers 30, 40 becomes stronger towards the ears 21, 22 of the occupant.

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２０１７－１７９０８９号の優先権を主張するものであり、日本国特許出願２０１７－１７９０８９号の全内容を本出願に参照により援用する。 This application claims priority to Japanese Patent Application No. 2017-179089 filed on Sep. 19, 2017, and the entire contents of Japanese Patent Application No. 2017-179089 are incorporated by reference into the present application. Do.
本発明は、音響装置に関する。 The present invention relates to an acoustic device.
車載用立体音響装置において、乗員（運転者）の左右の後方に配置されたメインスピーカ、及び乗員の前方に配置された副スピーカからの出力音によって、立体音像を生成する技術がある（例えば、特許文献１参照）。この音響装置では、例えば運転シートの背もたれ部分の肩部の左側に車両の前方に向けて左スピーカが配置されるとともに、肩部の右側に車両の前方に向けて右スピーカが配置されている。また、副スピーカを、ステアリングコラムの下部やダッシュボードなど、乗員の前方に配置する構成が示されている。 In a vehicle-mounted stereophonic sound device, there is a technique of generating a stereophonic sound image by the output sound from the main speakers disposed on the left and the rear of the occupant (driver) and the sub-speaker disposed in the front of the occupant (for example, Patent Document 1). In this acoustic device, for example, a left speaker is disposed on the left side of a shoulder portion of a backrest portion of a driver's seat toward the front of the vehicle, and a right speaker is disposed on the right side of the shoulder portion toward the front of the vehicle. Further, the configuration is shown in which the sub-speaker is disposed in front of the occupant, such as a lower portion of a steering column or a dashboard.
特開２０１０－４３６１号公報JP, 2010-4361, A
一般的に、乗員の身長には、個人差が存在するが、特許文献１に開示された音響装置は、この身長の個人差によって、各スピーカから乗員の耳に到達する音の特性に差が生じ、乗員が感じる音が立体音像とならない可能性があった。 Generally, there are individual differences in the height of the occupant, but the acoustic device disclosed in Patent Document 1 has a difference in the characteristics of the sound reaching the occupant's ear from each speaker due to the individual difference in height. There is a possibility that the sound produced by the occupant does not become a three-dimensional sound image.
本発明の目的は、身長の個人差に関わらず、乗員が感じる音を立体音像とすることが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 making a sound felt by a passenger a three-dimensional sound image regardless of the individual difference in height.
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、前記少なくとも２つのスピーカは、前記少なくとも２つのスピーカの指向性が前記乗員の耳に向けて強くなるように配置されている、音響装置。
［２］前記少なくとも２つのスピーカは、前記座席の中心線に対して対称に配置されている、上記［１］に記載の音響装置。
［３］前記少なくとも２つのスピーカのうち、前記中心線に対して右側に配置されるスピーカは、前記指向性が前記乗員の右耳に向けて強くなるように配置され、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は、前記指向性が前記乗員の左耳に向けて強くなるように配置される、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、その出力軸が前記乗員の耳の方向になるように、所定の角度を有して上向きに配置されている、上記［１］乃至［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、インストルメントパネルに配置されている、上記［１］乃至［４］のいずれか１に記載の音響装置。
［６］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車高の方向に広い範囲となるように配置されている、上記［１］乃至［５］のいずれか１に記載の音響装置。
［７］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］乃至［５］のいずれか１に記載の音響装置。
［８］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］乃至［７］のいずれか１に記載の音響装置。
［９］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［８］に記載の音響装置。
［１０］前記制御部は、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。 [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, and output from the at least two speakers A control unit for controlling the characteristics of the sound output from each of the speakers so as to maintain a three-dimensional sound image of the sound, and the at least two speakers have directivity of the at least two speakers of the occupant An acoustic device that is positioned to be strong towards the ear.
[2] The acoustic device according to [1], wherein the at least two speakers are arranged symmetrically with respect to a center line of the seat.
[3] Of the at least two speakers, the speakers disposed on the right side with respect to the center line are arranged such that the directivity is strong toward the right ear of the occupant, and the at least two speakers The sound device according to the above [1] or [2], wherein the speaker disposed on the left side with respect to the center line is disposed such that the directivity is strong toward the left ear of the occupant.
[4] Any one of the above [1] to [3], wherein the at least two speakers are disposed upward with a predetermined angle such that the output axis is in the direction of the occupant's ear The acoustic device according to 1.
[5] The acoustic device according to any one of the above [1] to [4], wherein the at least two speakers are disposed in an instrument panel.
[6] The at least two speakers according to any one of the above [1] to [5], wherein the directivity of the output of each of the speakers is wide in the direction of the vehicle height. Sound equipment.
[7] The acoustic device according to any one of [1] to [5], wherein the directivity of the output of each of the at least two speakers is omnidirectional.
[8] 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 adjustment means for performing phase delay processing on the audio signal of the left channel corresponding to the speaker disposed on the left with respect to the left side, the audio signal of the right channel and the left phase delayed by the phase adjustment means The audio signal of the channel, and the audio signal of the left channel and the audio signal of the right channel delayed in phase by the phase adjusting means are respectively added to each other to output driving signals of the left and right channels. The acoustic device according to any one of the above [1] to [7].
[9] 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 [8].
[10] The control unit controls the phase difference between the sound based on the sound signal of the right channel and the sound based on the sound signal of the right channel delayed by the phase adjustment unit to be 2πn (in the right ear) 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, the sound based on the audio signal of the left channel and the audio signal of the left channel phase-delayed by the phase adjustment means And the phase difference between the sound based on the sound signal of the right channel and the phase difference is delayed by the phase adjustment unit. [9], wherein the phase difference in the phase adjusting means is set such that the phase difference with the sound based on the voice signal of the channel is π n (n = 0, 1, 2...) Sound equipment.
本発明の一実施形態によれば、身長の個人差に関わらず、乗員が感じる音が立体音像とな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 in which the sound felt by the occupant is a three-dimensional sound image regardless of the individual difference in height.
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、スピーカが直交する方向に指向性を有する場合において、スピーカの指向特性が車高の方向に狭い範囲となるように配置されているＸＹ面における指向特性を示す説明図である。FIG. 3A is an explanatory view showing directivity characteristics in the XY plane in which the directivity characteristics of the speaker are in a narrow range in the direction of the vehicle height when the speakers have directivity in the orthogonal direction. 図３Ｂは、スピーカが直交する方向に指向性を有する場合において、スピーカの指向特性が車高の方向に広い範囲となるように配置されているＸＺ面における指向特性を示す説明図である。FIG. 3B is an explanatory view showing the directivity in the XZ plane in which the directivity of the speaker is wide in the direction of the vehicle height when the loudspeaker has directivity in the orthogonal direction. 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、運転者の耳の位置が、座席の車高方向への高さ調整や、座席に着座する運転者の身長の高い低いにより変化することを示す、図２相当の側面図である。FIG. 5 is a side view corresponding to FIG. 2 and showing that the position of the driver's ear changes due to the height adjustment of the seat in the height direction and the height and lowness of the driver sitting on the seat .
（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、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３０、４０から出力される音の特性を制御する制御部１００と、を備え、２つのスピーカ３０、４０は、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. Control for controlling the characteristics of the sound output from each of the speakers 30 and 40 so that the three-dimensional sound image by the sounds output from the two speakers 30 and 40 and the two speakers 30 and 40 arranged so as to be held is maintained The two speakers 30 and 40 are disposed and configured such that the directivity of the two speakers 30 and 40 becomes stronger toward the ears 21 and 22 of the occupant.
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が座席１０の中心線１１を挟んで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 disposed symmetrically with respect to the center line 11 of the seat 10.
（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、インストルメントパネル７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 disposed, for example, on the instrument panel 7. 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、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取り付けられており、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取り付けられている。 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, the output shaft 31 of the right speaker 30 is mounted in the direction of the right ear 21 of the driver 20 and the output shaft 41 of the left speaker 40 is mounted in the direction of the left ear 22 of the driver 20 It is done.
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、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をやや上向き（Ｘ軸方向）に配置する。右スピーカ３０も同様に、やや上向き（Ｘ軸方向）に配置する。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, the left speaker 40 is disposed slightly upward (in the X-axis direction) such that the output shaft 41 of the left speaker 40 is in the direction of the left ear 22 of the driver 20. Similarly, 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.
（スピーカの指向特性）
図３Ａ、図３Ｂで示すスピーカの指向特性は、Ｘ方向とＺ方向の指向特性が異なる場合を示している。図３Ａ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３５のＸ軸上の点３５ａ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３５ｂ、３５ｃの点で規定される開き角を指向角度θ２と定義する。図３Ａにおいて、Ｙ方向における指向角度はθ２である。 (Directivity characteristic of speaker)
The directivity characteristics of the speaker shown in FIG. 3A and FIG. 3B show cases where the directivity characteristics in the X direction and the Z direction are different. In FIG. 3A, the directional characteristic indicating the spread of the sound output from the speakers 30 and 40 has a maximum point 35a on the X axis of the sound wave surface 35, and the sound pressure drops by 6 dB from the maximum sound pressure on the X axis The opening angle defined by the points 35b and 35c is defined as the directivity angle θ2. In FIG. 3A, the directivity angle in the Y direction is θ2.
図３Ｂ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θ１と定義する。図３Ｂにおいて、Ｚ方向における指向角度はθ１である。指向角度はθ１＞θ２である。 In FIG. 3B, 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 36b and 36c is defined as the directivity angle .theta.1. In FIG. 3B, the directivity angle in the Z direction is θ1. The pointing angle is θ1> θ2.
図３Ａ、図３Ｂからわかるように、指向角度はθ１＞θ２であるので、図３Ａ、図３Ｂで示すスピーカの指向特性は、Ｚ方向、すなわち、車両５の車高の方向に広い範囲となる。 As can be seen from FIGS. 3A and 3B, since the directivity angle is θ1> θ2, the directivity characteristics of the speakers shown in FIGS. 3A and 3B are in a wide range in the Z direction, that is, the direction of the height of the vehicle 5. .
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θ１と定義する。図４Ａにおいて、Ｙ方向における指向角度はθ１である。 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 36b and 36c is defined as the directivity angle .theta.1. In FIG. 4A, the directivity angle in the Y direction is θ1.
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θ１と定義する。図４Ｂにおいて、Ｚ方向における指向角度はθ１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 36b and 36c is defined as the directivity angle .theta.1. In FIG. 4B, the directivity angle in the Z direction is θ1.
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θ１であるので、図４Ａ、図４Ｂで示すスピーカの指向特性は、全方位性を有するものとなる。 As can be seen from FIGS. 4A and 4B, since the directivity angle is θ1 in both the X direction and the Z direction, the directivity characteristics of the speaker shown in FIGS. 4A and 4B have omnidirectionality.
（車高の方向に広い指向特性を有するスピーカの配置）
図３Ａ、図３Ｂで示したスピーカ３０、４０を所定の向きでインストルメントパネル７に配置した場合を、図５に示す。 (Speaker arrangement with wide directional characteristics in the direction of the vehicle height)
The case where the speakers 30 and 40 shown in FIG. 3A and FIG. 3B are arranged on the instrument panel 7 in a predetermined direction is shown in FIG.
図５に示すように、図３Ｂで示したスピーカ３０、４０の指向角度の大きい方（指向角度θ１）をＺ軸方向、車高の方向として配置する。これにより、指向性が車高の方向に広い範囲となるように配置される。 As shown in FIG. 5, one of the speakers 30 and 40 shown in FIG. 3B with the larger directivity angle (directivity angle θ1) is disposed as the Z-axis direction and the direction of the vehicle height. Thus, the directivity is arranged in a wide range in the direction of the vehicle height.
一方、図３Ａで示したスピーカ３０、４０の指向角度の小さい方（指向角度θ２）をＹ軸方向、車幅の方向として配置する。 On the other hand, the smaller directional angle (directional angle θ2) of the speakers 30, 40 shown in FIG. 3A is disposed as the Y-axis direction and the direction of the vehicle width.
図５に示すように、運転者２０の耳２１、２２の位置は、座席１０の車高方向への高さ調整や、座席１０に着座する運転者２０の身長の高い低いにより変化する。したがって、スピーカ３０、４０の指向性が車高の方向に広い範囲となるように配置されることにより、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、運転者２０の耳元に音を安定して定位させることができる。 As shown in FIG. 5, the positions of the ears 21 and 22 of the driver 20 change due to the height adjustment of the seat 10 in the vehicle height direction and the height and lowness of the driver 20 sitting on the seat 10. Therefore, by arranging the directivity of the speakers 30, 40 to be in a wide range in the direction of the vehicle height, the directivity of the speakers 30, 40 is arranged to be stronger toward the ears 21, 22 of the occupant. The sound can be stably localized at the ear of the driver 20.
（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.
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、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３０、４０から出力される音の特性を制御する制御部１００と、を備え、２つのスピーカ３０、４０は、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て構成されている。各スピーカの出力軸が乗員（運転者）の耳の方向に向けて配置されているので、スピーカの指向性が乗員の耳に向けて強くなるように構成可能である。
（２）スピーカの指向性が全方位性を有する場合においても、上記のように、各スピーカの出力軸を乗員（運転者）の耳の方向に向けて配置することにより、スピーカの指向性が乗員の耳に向けて強くなるように構成可能である。
（３）スピーカの指向特性がＸ方向とＺ方向の指向特性が異なる場合において、スピーカの指向角度の大きい方（指向角度θ１）をＺ軸方向、車高の方向として配置する。これにより、指向性が車高の方向に広い範囲となるように配置することができる。図５に示すように、乗員（運転者）の耳の位置は、座席の車高方向への高さ調整や、座席に着座する乗員（運転者）の身長の高い低いにより変化する。したがって、スピーカの指向性が車高の方向に広い範囲となるように配置されることにより、スピーカの指向性が乗員の耳に向けて強くなるように構成できる。これにより、乗員（運転者）の耳元に音を安定して定位させることができる。
（４）スピーカからの音を乗員（運転者）の耳元に安定して定位させるには、制御部による音像の定位制御で説明したように、スピーカから乗員（運転者）の耳元までの距離を考慮して位相差を設定する必要がある。スピーカの指向性が車高の方向に広い範囲となるようにスピーカを配置することにより、座席の車高方向への高さ調整や、座席に着座する乗員（運転者）の身長の高い低いによる影響を受けにくく、乗員（運転者）の耳元に音を安定して定位させることができ、乗員の広い身長の範囲において、乗員が感じる音を立体音像とすることができる。 (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. The characteristics of the sound output from each of the speakers 30, 40 are maintained so as to maintain a three-dimensional sound image by the two speakers 30, 40 arranged so as to sandwich the line 11 and the sounds output from the two speakers 30, 40. The two speakers 30, 40 are arranged and configured such that the directivity of the two speakers 30, 40 becomes stronger toward the ears 21, 22 of the occupant. Since the output shaft of each speaker is disposed in the direction of the occupant's (driver's) ear, the directivity of the speaker can be configured to be strong toward the occupant's ear.
(2) Even when the directivity of the loudspeakers is omnidirectional, as described above, by arranging the output axis of each loudspeaker in the direction of the occupant's (driver's) ear, the directivity of the loudspeakers is improved. It can be configured to be strong towards the occupant's ear.
(3) When the directional characteristics of the speaker are different between the directional characteristics in the X direction and the Z direction, the larger directional angle (directional angle θ1) of the loudspeaker is disposed as the Z axis direction and the direction of the vehicle height. Thus, the directivity can be arranged in a wide range in the direction of the vehicle height. As shown in FIG. 5, the position of the occupant's (driver's) ear changes due to the height adjustment of the seat in the vehicle height direction and the height and lowness of the occupant (driver's) seated in the seat. Therefore, by arranging the directivity of the speaker to be in a wide range in the direction of the vehicle height, the directivity of the speaker can be configured to be stronger toward the occupant's ear. Thereby, the sound can be stably localized at the ear of the occupant (driver).
(4) In order to stably localize the sound from the speaker at the ear of the occupant (driver), as described in the localization control of the sound image by the control unit, the distance from the speaker to the ear of the occupant (driver) is It is necessary to set the phase difference in consideration. By arranging the speakers so that the directivity of the speakers is in a wide range in the direction of the vehicle height, the height adjustment of the seat in the vehicle height direction and the tall and low height of the occupant (driver) seated in the seat It is hard to be affected, and the sound can be stably localized at the ear of the occupant (driver), and the sound felt by the occupant can be made into a three-dimensional sound image in the range of a large height of the occupant.
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
７ インストルメントパネル
１０ 座席
１１ 中心線
２０ 運転者
２１ 右耳
２２ 左耳
３０ 右スピーカ
４０ 左スピーカ
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 7 instrument panel 10 seat 11 center line 20 driver 21 right ear 22 left ear 30 right speaker 40 left speaker 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、
    前記少なくとも２つのスピーカは、前記少なくとも２つのスピーカの指向性が前記乗員の耳に向けて強くなるように配置されている、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 control unit configured to control characteristics of the sound output from each of the speakers such that a three-dimensional sound image of the sounds output from the at least two speakers is maintained;
    An acoustic device, wherein the at least two speakers are arranged such that the directivity of the at least two speakers is stronger towards the occupant's ear.
  2. 前記少なくとも２つのスピーカは、前記座席の中心線に対して対称に配置されている、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 arranged symmetrically with respect to a center line of the seat.
  3. 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は、前記指向性が前記乗員の右耳に向けて強くなるように配置され、
    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は、前記指向性が前記乗員の左耳に向けて強くなるように配置される、請求項１又は２に記載の音響装置。     Among the at least two speakers, the speaker disposed on the right side with respect to the center line is disposed such that the directivity is strong toward the right ear of the occupant,
    3. The speaker according to claim 1, wherein one of the at least two speakers disposed on the left side with respect to the center line is disposed such that the directivity is strong toward the left ear of the occupant. Sound equipment.
  4. 前記少なくとも２つのスピーカは、その出力軸が前記乗員の耳の方向になるように、所定の角度を有して上向きに配置されている、請求項１乃至３のいずれか１項に記載の音響装置。 The sound according to any one of claims 1 to 3, wherein the at least two speakers are arranged upward with a predetermined angle such that the output axis is in the direction of the occupant's ear. apparatus.
  5. 前記少なくとも２つのスピーカは、インストルメントパネルに配置されている、請求項１乃至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 arranged in an instrument panel.
  6. 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の範囲が車高の方向に広くなるように配置されている、請求項１乃至５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 5, wherein the at least two speakers are arranged such that the directivity range of the output of each of the speakers becomes wider in the direction of the vehicle height.
  7. 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乃至５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 5, wherein the directivity of the output of each of the at least two speakers is omnidirectional.
  8. 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乃至７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 on 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 of the left channel delayed by the phase adjustment means The audio signal, the audio signal of the left channel, and the audio signal of the right channel delayed in phase by the phase adjustment means are respectively added to each other to output driving signals of left and right channels. The acoustic device according to any one of 1 to 7.
  9. 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８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 8.
  10. 前記制御部は、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。 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 delayed by the phase adjustment unit to be 2πn (n = 0) in the right ear. , 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 π n (n = 0 1, 2, ...), and at the left ear, a sound based on the sound signal of the left channel and a sound based on the sound signal of the left channel phase-delayed by the phase adjustment means And the phase difference between the sound of the right channel and the sound of the right channel, and the phase of the right channel delayed by the phase adjustment unit. Serial so that the phase difference between the sound based on the audio signal is πn (n = 0,1,2 ···), setting the phase difference in said phase adjusting means, respectively, the acoustic apparatus according to claim 9.
PCT/JP2018/033270 2017-09-19 2018-09-07 Acoustic device WO2019059004A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009290663A (en) * 2008-05-30 2009-12-10 Pioneer Electronic Corp On-vehicle speaker system
JP2012010094A (en) * 2010-06-24 2012-01-12 Fujitsu Ten Ltd On-vehicle sound field control apparatus
JP2012231448A (en) * 2011-04-14 2012-11-22 Jvc Kenwood Corp Sound field generation device, sound field generation system, and sound field generation method
JP2015097682A (en) * 2013-11-19 2015-05-28 クラリオン株式会社 Headrest device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009290663A (en) * 2008-05-30 2009-12-10 Pioneer Electronic Corp On-vehicle speaker system
JP2012010094A (en) * 2010-06-24 2012-01-12 Fujitsu Ten Ltd On-vehicle sound field control apparatus
JP2012231448A (en) * 2011-04-14 2012-11-22 Jvc Kenwood Corp Sound field generation device, sound field generation system, and sound field generation method
JP2015097682A (en) * 2013-11-19 2015-05-28 クラリオン株式会社 Headrest device

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