WO2005034574A1 - Dispositif de reproduction acoustique tridimensionnelle au moyen d'un casque - Google Patents

Dispositif de reproduction acoustique tridimensionnelle au moyen d'un casque Download PDF

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Publication number
WO2005034574A1
WO2005034574A1 PCT/JP2004/014984 JP2004014984W WO2005034574A1 WO 2005034574 A1 WO2005034574 A1 WO 2005034574A1 JP 2004014984 W JP2004014984 W JP 2004014984W WO 2005034574 A1 WO2005034574 A1 WO 2005034574A1
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WO
WIPO (PCT)
Prior art keywords
sound
speaker
speakers
headphone
ear
Prior art date
Application number
PCT/JP2004/014984
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English (en)
Japanese (ja)
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WO2005034574B1 (fr
Inventor
Isamu Koizumi
Original Assignee
Isamu Koizumi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Isamu Koizumi filed Critical Isamu Koizumi
Publication of WO2005034574A1 publication Critical patent/WO2005034574A1/fr
Publication of WO2005034574B1 publication Critical patent/WO2005034574B1/fr

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Classifications

    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1075—Mountings of transducers in earphones or headphones
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1058—Manufacture or assembly
    • H04R1/1066—Constructional aspects of the interconnection between earpiece and earpiece support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/022—Plurality of transducers corresponding to a plurality of sound channels in each earpiece of headphones or in a single enclosure
    • 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
    • H04R5/033—Headphones for stereophonic communication

Definitions

  • the present invention relates to a stereophonic sound reproducing device using a headphone, and is suitable as, for example, a multi-channel stereophonic sound reproducing device for reproducing a three-dimensional sound space.
  • Conventional headphone speakers do not emit sound waves in consideration of the function based on the three-dimensional structure of the local region of the pinna.
  • the conventional headphone requires 2-3 times the size of the conventional headphone to reproduce the forward sound and the rear sound separately, as shown in Fig. 12, making it difficult to use.
  • a special amplifier had to be used. For this reason, conventional headphones cannot reproduce a multi-channel sound field or a true three-dimensional sound field. Also, when multi-channel sound is reproduced using this special amplifier, the sound signal is electrically processed and the sound quality deteriorates, making it difficult to reproduce high-quality sound. Because of that, it is expensive.
  • the sound reproduced from a conventional headphone had the disadvantage that the sound image was localized in the head and at the top of the head. Even when sound effects such as reflection reverberation are given, since the sound effects are emitted from the same speaker as the speaker that reproduces the direct sound, indirect sound is emitted from speakers with the same sound wave radiation axis angle. The sound is emitted, and the indirect sound, which should be heard from a direction different from the direct sound, is heard from the same direction as the direct sound. Therefore, there is a problem that the effect of the sound effect is almost nil, and when the sound volume of the sound effect is increased, the direct sound is buried in the indirect sound, and the reproduction of the important direct sound becomes unclear.
  • the present invention uses a headphone that utilizes the sound collection function of the pinna and the function of recognizing the direction of the pinna.
  • a headphone stereophonic sound system that can reproduce a separated multichannel sound field and reproduce a natural three-dimensional sound field with a high-quality sound quality that is not localized at the top of the head or in the head. The purpose is to provide. Brief Description of Drawings Figure Ear canal mouth, 2 tragus, 3 concha cavernosa 4
  • Fig. 2 Explanatory diagram for showing the sound wave emission axis of the speaker
  • FIG. 3 Explanatory diagram for showing the head and sound wave incident angle viewed from above
  • Fig. 4 Explanatory diagram for showing the head and sound wave incident angle as viewed from the side
  • FIG. 5 Block diagram of reflected sound reverberation processor
  • Fig. 6 A Diagram of direct sound and indirect sound in a three-dimensional sound field
  • FIG. 7 is a schematic perspective view showing the structure of a headphone capable of listening to stereophonic sound in consideration of the pinna function of the present invention.
  • FIG. 8 is an external view of a headphone according to the present invention in a mounted state.
  • Fig. 9 is a schematic perspective view of the present invention, in which the sound source is heard from slightly above the eyes.
  • Fig. 10 The same schematic perspective view as Fig. 9, but the sound source can be heard from slightly below the eyes.
  • Fig. 12 Conventional stereophonic headphone (Japanese Patent Publication No. 2000-213)
  • Fig. 13 1 Ear canal mouth, 2 tragus, 3 Concha of ear
  • Fig. 1 1 ear canal, 2 tragus, 3 concha
  • Fig. 2 1 Sound radiation axis, 2 speakers, 3 sound waves
  • Figure 3 Sound radiation axis of left front speaker
  • Fig. 6 1 left sound source, 2 direct sound, 3 N-1st indirect sound
  • Fig. 7 1 Left front speaker, 2 Right front speaker, 3 Left rear speaker
  • Fig. 8 1 Left front speaker 3 Left front speaker-Sound emission surface
  • Fig. 13 1 Ear canal mouth, 2 tragus, 3 Concha of ear
  • the pinna has a sound collection function and a direction recognition function. However, its detailed mechanism has not yet been elucidated.
  • the pinna has a complex external shape as shown by A in Fig. 1, and is not a uniform three-dimensional structure as a whole, but the three-dimensional structure differs greatly for each part of the pinna.
  • the pinna can be considered as an aggregate of a plurality of sound collectors.
  • the present inventor has found that the plurality of sound collectors have directional characteristics with sensitivity in different directions, respectively, and contribute to auditory direction recognition.
  • the sound waves that are collected not in the entire pinna but in the direction of the arriving sound wave and that are collected at the sensitive part of the pinna are transmitted to the eardrum as effective information. Is done.
  • the sound wave arriving at the pinna is reflected and absorbed based on the specific difference in the local form, and as a result, sound direction information is generated and transmitted to the eardrum along with information on volume and sound quality.
  • the auditory center compares and analyzes the sound information with the positional relationship between the sound source position experienced in the past and the sound direction information, and grasps and recognizes the position of the sound source.
  • the direction axis connecting the center of the speaker that generates the sound wave and the center of the sound wave in the direction of sound wave propagation is defined as the sound wave radiation axis.
  • the angle formed with the cross section is referred to as the sound wave radiation axis angle, and this angle is hereinafter simply referred to as the incident angle.
  • the sound source direction information is defined as ⁇ , where the incident angle of the sound wave from the sound source to the local pinna is the incident angle to the sagittal plane. Accordingly, the sound wave is reflected and absorbed based on the morphological specificity at the local pinna region having the highest sound collection rate, and the direction information of the sound source is generated. The sound wave from the sound source is heard as a virtual sound source localized at a specific position in the three-dimensional space based on the generated sound direction information. This sound direction information is transmitted to the eardrum along with the volume and sound quality information.
  • the relationship between the incident angle ⁇ of the sound wave from the loudspeaker 1 and the position of the virtual sound source is verified.
  • the degree of increase in the sound wave incident angle ⁇ ⁇ ⁇ ⁇ with respect to the sagittal plane of the loudspeaker 1 in the cross section is increased It was found that the virtual sound source moved backward in accordance with.
  • the virtual sound source moves upward when the sound wave incident angle ⁇ on the cross section increases, and the virtual sound source position moves downward when the sound wave incident angle on the lower cross section increases.
  • the sound wave emission axis of the front speaker and the sound wave emission axis of the rear speaker for sound signal reproduction are arranged so that they can pass through the space from the vicinity of the tragus of the tragus to the vicinity of the ridge of the ear ring at each incident angle. If this is done, the listener can efficiently locate the virtual sound source in a wide-angle range from the front to the back and distinguish between the virtual sound sources.
  • ⁇ speakers with different sound incidence angles for each of the left and right channel units according to the above principle, it can be located at different spatial positions in the three-dimensional space ⁇
  • a headphone that can reproduce ⁇ virtual sound sources Can be realized.
  • the sound signal from one speaker will be Since the sound sources are located at different spatial positions in the three-dimensional space as virtual sound sources, it is possible to localize and reproduce the same number of virtual sound sources as sound sources at the time of recording at different three-dimensional space positions.
  • Bass for example, 0.1 channel in surround playback
  • Bass has low directivity, so it can be placed at any location near the pinna for the left and right ears.
  • the delay sound reverberation sound adjusting means reproduces sound effects such as delay and echo by speakers with different sound radiation axes, respectively.
  • Delay time according to the spatial position of the virtual sound source, sound effect such as echo The sound field to be reproduced can be heard more realistically by giving the sound waves to speakers having different sound emission axes.
  • the Nth delayed reverberation processor shown in Fig. 5 generates an Nth delayed reverberation signal, which is an indirect sound signal arriving from the virtual sound source position generated by the sound wave radiation axis of the Nth speaker.
  • Fig. 6 shows some of the direct and indirect sounds of the left sound source.
  • the (N-1) th delayed reverberation signal created by the (N-1) th delayed reverberation processor is a sound radiation that is virtually localized in the direction through the fixed point 3a in order to reproduce indirect sound 3. It is attached to a speaker with an axis.
  • the N-th delayed reverberation signal created by the N-th delayed reverberation processor is applied to a speaker with a sound radiation axis that is temporarily assumed in the direction passing through the fixed point 4c in order to reproduce indirect sound 4. .
  • the position of virtual localization in (N-1) 3D spaces excluding direct sound 2 is defined as the fixed point, and the position of virtual localization in N 3D spaces from the indirect sound from this fixed point and the opposite channel. Since it is possible to listen to the indirect sound from this fixed point by setting the point as a point, the size of the reproduced sound field space and the sense of distance to the direct sound source can be reproduced more faithfully. In multi-channel playback, the listener can perceive a more accurate sound field. As a simpler configuration, in the case of a two-channel stereo, one set of delay devices for generating one type of delay time is prepared for the right and left speakers, and the delayed sound of the left channel is added to the right rear speaker, and the right channel delay is added. When the rear sound is applied to the left rear speaker, the conventional two-channel sound source can be made multi-channel and heard.
  • the delay device is set not only electrically but also by setting the physical distance between the diaphragm surface of the rear speaker and the eardrum, the conventional 2-channel sound source can be converted into a multi-channel for listening without adding any electric circuit. It becomes possible.
  • FIG. -Headphones Speaker 1 for front sound reproduction for listener's left ear, 3 for back sound reproduction, Speaker 2 for front sound reproduction for listener's right ear, 4 for back sound reproduction, speed And supporting members 5 and 6 for supporting 1-4.
  • the support members 5 and 6 support the speakers 1 to 4 so as to satisfy the following conditions (1) to (3).
  • the rear loudspeakers 3 and 4 have the sound wave emission axis directed toward the outside of the tragus, from the outside of the annulus to the inside of the tragus, around the ear canal, and the concha area In a position where the sound waves can be emitted.
  • the sound radiation axes of the front speakers 1 and 2 are arranged at an angle in the range of approximately 0 to 90 degrees with respect to the sagittal plane, and the rear speakers
  • the sound radiation axes of the cars 3 and 4 are arranged at an angle in the range of approximately 9 ° to approximately 180 ° with respect to the sagittal plane.
  • FIG. 8 is a diagram of the actual wearing.
  • the headphone speaker shown in Fig. 9 is tilted slightly upward with respect to the cross section, so the sound source can be heard from slightly below the line of sight. Conversely, if the headphone speaker shown in Fig.
  • the sound source 10 is arranged downward with respect to the cross section, the sound source can be heard from slightly above the eyes. It is a preferable example that the bass-only reproduction speaker 1 is disposed between the front speaker and the rear speaker as shown in FIG. This sound source is the same as the eyes I can hear from the height (

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

Lorsqu'une onde sonore provenant d'un haut-parleur n'est émise qu'à une partie de l'oreille au lieu de l'oreille entière, une différence de réflexion et d'absorption d'onde sonore est générée, en raison de la différence se présentant dans la forme de la partie de l'oreille qui devient information directionnelle pour la membrane du tympan. Un son provenant d'un haut-parleur ayant un axe de rayonnement d'une onde sonore différent de l'angle d'incidence de l'onde sonore pour le plan sagittal de la tête, est localisé en tant que source sonore virtuelle provenant d'une direction différente. Sans recourir à un traitement de localisation d'une image sonore spéciale, via un traitement à signal sonore-électrique, il est possible de reproduire un champ sonore tridimensionnel ayant une dispersion naturelle sans localisation d'une image sonore sur la portion pariétale ou à l'intérieur de la tête, en utilisant uniquement un casque. Il est également possible de reproduire un champ sonore environnant permettant à un auditeur de séparer le son directionnel avant du son directionnel arrière. Il est possible de reproduire le canal 5.1, ainsi que le canal 7.1 ou au-dessus, selon ce qui est censé d'être utilisé dans l'avenir.
PCT/JP2004/014984 2003-10-02 2004-10-04 Dispositif de reproduction acoustique tridimensionnelle au moyen d'un casque WO2005034574A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003377537A JP4221746B2 (ja) 2003-10-02 2003-10-02 ヘッドホン装置
JP2003-377537 2003-10-02

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WO2005034574A1 true WO2005034574A1 (fr) 2005-04-14
WO2005034574B1 WO2005034574B1 (fr) 2005-06-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11356762B2 (en) 2018-01-24 2022-06-07 Harman Becker Automotive Systems Gmbh Headphone arrangements for generating natural directional pinna cues
WO2024087907A1 (fr) * 2022-10-28 2024-05-02 深圳市韶音科技有限公司 Écouteur bouton

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007089033A1 (fr) 2006-02-01 2007-08-09 Sony Corporation Convertisseur électroacoustique et dispositif écouteur
JP4826467B2 (ja) * 2006-02-01 2011-11-30 ソニー株式会社 電気音響変換器及びイヤースピーカ装置
JP4826454B2 (ja) * 2006-02-01 2011-11-30 ソニー株式会社 イヤースピーカ装置
JP4826457B2 (ja) * 2006-02-01 2011-11-30 ソニー株式会社 電気音響変換器及びイヤースピーカ装置
US8175316B2 (en) 2006-12-05 2012-05-08 Sony Corporation Ear speaker device
JP4913256B1 (ja) 2011-07-05 2012-04-11 勇 小泉 カナル型受話器用イヤーピース及びそれを利用したカナル型受話器、並びにカナル型受話器を利用した聴診器及び補聴器
JP6687275B1 (ja) * 2019-10-27 2020-04-22 勇 小泉 ヘッドホン装置
JP7005062B1 (ja) * 2021-06-11 2022-02-14 富士音響技研株式会社 言語学習用機器、言語学習用システム及び音声記録媒体

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0537994A (ja) * 1991-08-02 1993-02-12 Nippon Telegr & Teleph Corp <Ntt> 音声再生装置
JPH05336599A (ja) * 1992-06-03 1993-12-17 Fujitsu Ltd 音像定位ヘッドホン装置および、それを用いた仮想現実視聴覚装置
JPH0851687A (ja) * 1994-08-03 1996-02-20 Kiyoaki Kakegawa サウンドフォログラムおよび関連機器
JP2000078698A (ja) * 1998-08-28 2000-03-14 Hiroshi Katagawa ヘッドホン
JP2003125499A (ja) * 2001-10-17 2003-04-25 Sony Corp 音響再生装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0537994A (ja) * 1991-08-02 1993-02-12 Nippon Telegr & Teleph Corp <Ntt> 音声再生装置
JPH05336599A (ja) * 1992-06-03 1993-12-17 Fujitsu Ltd 音像定位ヘッドホン装置および、それを用いた仮想現実視聴覚装置
JPH0851687A (ja) * 1994-08-03 1996-02-20 Kiyoaki Kakegawa サウンドフォログラムおよび関連機器
JP2000078698A (ja) * 1998-08-28 2000-03-14 Hiroshi Katagawa ヘッドホン
JP2003125499A (ja) * 2001-10-17 2003-04-25 Sony Corp 音響再生装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11356762B2 (en) 2018-01-24 2022-06-07 Harman Becker Automotive Systems Gmbh Headphone arrangements for generating natural directional pinna cues
WO2024087907A1 (fr) * 2022-10-28 2024-05-02 深圳市韶音科技有限公司 Écouteur bouton

Also Published As

Publication number Publication date
JP4221746B2 (ja) 2009-02-12
WO2005034574B1 (fr) 2005-06-16
JP2005117594A (ja) 2005-04-28

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