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WO2002025990A1 - Systeme de casque multicanaux - Google Patents

Systeme de casque multicanaux Download PDF

Info

Publication number
WO2002025990A1
WO2002025990A1 PCT/KR2000/001328 KR0001328W WO0225990A1 WO 2002025990 A1 WO2002025990 A1 WO 2002025990A1 KR 0001328 W KR0001328 W KR 0001328W WO 0225990 A1 WO0225990 A1 WO 0225990A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
enclosures
sounds
adjustment plate
field generation
Prior art date
Application number
PCT/KR2000/001328
Other languages
English (en)
Inventor
Sung-Il Kim
Original Assignee
Mm Gear Co., Ltd.
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 Mm Gear Co., Ltd. filed Critical Mm Gear Co., Ltd.
Priority to JP2002528232A priority Critical patent/JP3681375B2/ja
Priority to AU1896901A priority patent/AU1896901A/xx
Priority to EP00981856A priority patent/EP1330935A4/fr
Publication of WO2002025990A1 publication Critical patent/WO2002025990A1/fr

Links

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
    • 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
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • 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 multi-channel headphones for use in reproducing 3-dimensional (3-D) sounds in an atmosphere of intimacy and privacy for individuals, and more particularly, to multi-channel headphones whose constructions are improved to make them fit comfortably and to enhance the sound quality.
  • each speaker unit is accommodated in a separate enclosure, discrete multi-channel sounds can be reproduced with accurate phase.
  • each speaker unit is mounted in a corresponding enclosure as far away from the listener's ears as possible, and sound passageways are constructed within each enclosure to allow repeated reflection and diffraction of the sounds during transmission of the sounds into the listener's eardrums.
  • a comparatively wide sound field that ensures that the listener perceives spatial character can be created bythe multi-channel headphones, like general large speaker systems.
  • a disadvantage of the multi-channel headphones lies in that, due to poor front and rear sound field integration, the sounds emanating from the adjacent front and rear enclosures cannot be perceived as clear sounds.
  • the phantom image cannot be created continuously and smoothly, so that the listener cannot experience enriched sounds with deep and wide spatial character.
  • the multi-channel headphones suggested by the present applicant include at least two speaker units for each ear piece, there is another problem in that the multi-channel headphones cannot comfortably fit over the listener's ears.
  • an object of the present invention to provide multi-channel headphones which can fit comfortably, and can deeply and widely expand the sound field.
  • multichannel headphones comprising: at least two speaker units for each ear piece, for reproducing distinct sounds; at least two enclosures for receiving each of the at least two speaker units; and a sound field generation member with an inner wall, the sound field generation member arranged such that it surrounds the listener's ear, for supporting the at least two enclosures, and creating an acoustic space for guiding the sounds from the enclosures into the listener's auricle. It is preferable that a number of projections or a series of grooves for deflecting, scattering and diffracting sounds are formed in the inner wall of the sound field generation member, thereby expanding the sound field. It is preferable that the multi-channel headphones further comprise a sound adjustment plate to filter the sound distorted during transmission in the enclosures and to prevent fluctuation of sound waves.
  • FIG. 1 illustrates a preferred embodiment of a pair of multi-channel headphones according to the present invention, which are worn by a listener;
  • FIG. 2 illustrates another preferred embodiment of multi-channel headphones according to the present invention
  • FIGS. 3A and 3B are perspective views illustrating the inner and outer sides of the multi-channel headphones of FIG. 2, respectively;
  • FIG. 4 is a sectional view illustrating the configuration of the main parts of the multi-channel headphones shown in FIG. 2;
  • FIG. 5 is a sectional view illustrating another example of the sound field generation member of the multi-channel headphones of FIG. 2.
  • FIG. 1 A preferred embodiment of multi-channel headphones according to the present invention is shown in FIG. 1.
  • FIG. 1 only the left ear piece of the multi-channel headphones worn by a listener is illustrated.
  • the right ear piece is engaged symmetrically with respect to the left ear piece on the right side of the listener's head with the same configuration as the left ear piece, and thus a description of the right ear piece will not provided here for convenience.
  • Reference numerals 10 and 10' denote speaker units for reproducing sounds emanating from distinct channels, which are arranged spaced apart from each other in the front and rear of the listener's ear.
  • Reference numerals 20 and 20' denote open-style enclosures for receiving the speaker units 10 and 10', respectively, and transferring the sounds from the speaker units 10 and 10' toward the listener's auricle.
  • Reference numeral 30 denotes an annular sound field generation member serving as an acoustic space for making the sound field created during transmission through the enclosures 20 and 20' to expand.
  • the speaker units 10 and 10' are mounted in the enclosures 20 and 20', respectively, such that the speaker units 10 and 10' are located far away from the listener's auricle.
  • a sound guide plate and a plurality of guide ribs for scattering and diffracting the sounds during transmission from the speaker units 10 and 10' to the listener's auricle are mounted within each of the enclosures 20 and 20'.
  • the constructions of the enclosures 20 and 20' are fully described in Korean Patent Application No. 10-2000-0009578, and thus descriptions thereof will not be provided here.
  • the sound field generation member 30 has an annular shape such that it envelopes the listener's auricle.
  • the acoustic space enclosed by the annular sound field generation member 30 serves to expand the sound field.
  • the sound field generation member 30 may be formed in combination with the headband 40, or may be separately manufactured and then connected to the headband 40.
  • the base of the sound field generation member 30 is shaped to rest stably on the listener's face, and the opposite side is open toward the ambient.
  • the enclosures 20 and 20' are mounted on the open side of the sound field generation member 30.
  • the sounds from the enclosures 20 and 20' are captured for a while within the acoustic space surrounded by the sound field generation member 30.
  • the sounds are reflected more than one time by the inner wall 31 (See FIG. 4), thereby expanding the sound field.
  • the listener can experience 3-D sounds with spatial character.
  • FIG. 2 Another embodiment of the multi-channel headphones is illustrated in FIG. 2.
  • the same reference numerals as in FIG. 1 are used to designate the same elements as in FIG. 1.
  • reference numerals 20 and 20' denote enclosures for receiving speaker units, respectively
  • reference numeral 30' represents a sound field generation member modified from the sound field generation member 30 of FIG. 1.
  • the enclosures 20 and 20' are mounted on
  • the sound adjustment plate 50 is mounted at the outside to cover the gap between the enclosures 20 and 20'.
  • An auxiliary sound adjustment plate 60 is fitted to the sound adjustment plate 50 as needed, and a seal member 70 around the periphery wall of the sound field generation member 30'.
  • the sound field generation member 30' of the present embodiment has an elliptical shape which is long in the lateral direction, such that the enclosures 20 and 20' are appropriately spaced apart from each other in the lateral direction. As shown in FIG. 4, the base of the sound field generation member 30' is curved such that it can fit comfortably over the listener's face. Irregular projections 32 are formed in the inner wall 31. The irregular projections 32 enhances a reverberant effect by reflecting, diffracting and dispersing the sounds. Alternatively, a plurality of grooves 33 can be regularly
  • the sound adjustment plate 50 is convex outwards, such that it covers the ends of the enclosures 20 and 20'.
  • the sound adjustment plate 50 has a series of longitudinal slits 51 a constant distance spaced apart from each other.
  • the sound adjustment plate 50 may formed as a separate member. It is preferable that the sound adjustment plate 50 is formed in combination with the headband 40, extending from the ends of the headband 40.
  • the auxiliary sound adjustment plate 60 has a series of ribs 61 , which are projections corresponding to the slits 52 of the sound adjustment plate 50.
  • the auxiliary sound adjustment plate 60 is optionally fitted into the sound adjustment plate 60 according to the listener's hearing ability or preference.
  • the slits 51 of the sound adjustment plate 50 and the ribs 61 of the auxiliary sound adjustment plate 60 appropriately absorb and reflect the direct and reflected sounds emanating from the speaker units mounted in the enclosures 20 and 20' which are scattered or distorted due to the gap between the enclosures 20 and 20' arranged in the front and rear of the listener's ear, thereby enhancing spatial effect and sound localization without fluctuations of the sounds.
  • the sound adjustment plate 50 and the auxiliary sound adjustment plate 60 allow a smooth and continuous moving of the directional phantom image from one speaker unit to the other speaker unit.
  • the continuity and accurate focusing of the phantom image by the sound field generation member 30' are ensured, which enables the listener to aware the location of every instrument used for the performance as if he or she is sitting in a concert hall.
  • the auxiliary sound adjustment plate 60 enables that the listener varies the depth of sounds, and is optionally adopted according to the listener's hearing ability or preference.
  • the seal member 70 provided for a pleasant contact with the headphones, as in a general headphones assembly, is formed of a smooth material such as foam, textile or leather.
  • the seal member 70 surrounds the peripheral wall of the sound field generation member 30(30') and extends the base and outer side of the sound field generation member 30(30').
  • the seal member 70 minimizes air leaking through the gap between the sound field generation member 30(30') and the listener's head, thereby absorbing unnecessary noise within the sound field generation member 30(30') and from the outside.
  • the shapes of the sound field generation member 30(30') and the projections 32 or grooves 33 formed in the inner wall 31 , the arrangement of the enclosures 20 and 20' on the sound field generation member 30', and the configuration and shapes of the sound adjustment plate 50 and the auxiliary sound adjustment plate 60 can be varied in different forms according to the sound character, or the listener's hearing ability or preference.
  • two speaker units are provided for each ear piece to reproduce 3-D sound.
  • more than two speaker units can be arranged for high-fidelity 3-D sound reproduction.
  • discrete speaker units for multi-channels are mounted in separate enclosures, which allows the listener to aware distinct sounds from the different channels with accurate phase. Due to the reflection and scattering of sound during transmission within the enclosures, high-quality sound can be produced with the essential phonic elements for 3-D sound reproduction, i.e, with the distinctness, spatial character caused by wide sound field, and directional phantom image.
  • the sound field generation member, the sound adjustment member, and the auxiliary sound adjustment member further extend the sound field that is significant in perceiving the directional phantom image, thereby increasing spatial effects.
  • the multi-channel headphones according to the present invention can solve the problems caused by the structural defects of the headphones, so that interference of sounds due to increased loadness does not occur, and high- fidelity 3-D sound can be reproduced as if the listener is sitting in a record room or a concert hall.
  • the multi-channel headphones according to the present invention are designed to fit comfortably over the listener' head, rather than ears, in consideration of the multiple speaker units enclosed in separate enclosures, and the weight of the speaker units and enclosures.
  • the configuration and design of the multi-channel headphones can be changed in a variety of forms.

Landscapes

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

Abstract

L'invention concerne un casque multicanaux assurant une qualité sonore en trois dimensions (3D) dans un contexte d'écoute intime et privé. Ce casque comporte: au moins deux unités de haut-parleur dans chaque écouteur pour la reproduction de sons distincts; au moins deux enceintes recevant respectivement les deux unités considérées; un élément de production de champ sonore à paroi intérieure, disposé de manière à entourer l'oreille de l'utilisateur, pour soutenir la ou les enceintes et établir un espace acoustique guidant le son depuis la ou les enceintes vers le pavillon de l'oreille de l'utilisateur; une plaque de réglage acoustique dotée d'une série de fentes pour assurer le réglage de la diffusion sonore directe depuis les unités de haut-parleur et de la réflexion sonore, cette plaque de réglage acoustique étant placée de manière à couvrir l'intervalle entre les extrémités adjacentes des enceintes; et une plaque de réglage acoustique auxiliaire dotée d'une série de nervures s'adaptant aux fentes de la plaque de réglage acoustique susmentionnée. Ce type de casque permet de résoudre les problèmes liés aux lacunes structurelles des modèles de casques existants, c'est-à-dire d'éviter les brouillages sonores résultant d'un accroissement de l'intensité sonore, et il permet en outre de reproduire un son 3D haute fidélité en assurant des effets réalistes.
PCT/KR2000/001328 2000-09-25 2000-11-17 Systeme de casque multicanaux WO2002025990A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2002528232A JP3681375B2 (ja) 2000-09-25 2000-11-17 多チャンネルヘッドホンシステム
AU1896901A AU1896901A (en) 2000-09-25 2000-11-17 Multi-channel headphone system
EP00981856A EP1330935A4 (fr) 2000-09-25 2000-11-17 Systeme de casque multicanaux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020000056191A KR100335171B1 (en) 2000-09-25 2000-09-25 Multi-channel headphone system
KR2000/56191 2000-09-25

Publications (1)

Publication Number Publication Date
WO2002025990A1 true WO2002025990A1 (fr) 2002-03-28

Family

ID=19690280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/001328 WO2002025990A1 (fr) 2000-09-25 2000-11-17 Systeme de casque multicanaux

Country Status (6)

Country Link
EP (1) EP1330935A4 (fr)
JP (1) JP3681375B2 (fr)
KR (1) KR100335171B1 (fr)
CN (1) CN1454444A (fr)
AU (1) AU1896901A (fr)
WO (1) WO2002025990A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854537A1 (fr) * 2003-04-29 2004-11-05 Hong Cong Tuyen Pham Casque acoustique pour la restitution spatiale d'un son.
RU2260254C2 (ru) * 2004-05-19 2005-09-10 Пыльнев Михаил Александрович Устройство наушников для воспроизведения звука
EP1338172A4 (fr) * 2000-10-13 2006-06-07 Mm Gear Co Ltd Accessoire de casque
WO2010106957A1 (fr) * 2009-03-17 2010-09-23 Akasu Katsumi Ecouteur
WO2018017012A1 (fr) 2016-07-20 2018-01-25 Razer (Asia-Pacific) Pte. Ltd. Casques d'écoute et procédés de configuration d'un casque d'écoute
US11115774B2 (en) 2019-04-30 2021-09-07 Shenzhen Voxtech Co., Ltd. Acoustic output apparatus
US11570556B2 (en) 2014-01-06 2023-01-31 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11582564B2 (en) 2014-01-06 2023-02-14 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11582563B2 (en) 2014-01-06 2023-02-14 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11617045B2 (en) 2014-01-06 2023-03-28 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11706574B2 (en) 2014-01-06 2023-07-18 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11974097B2 (en) 2014-01-06 2024-04-30 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100496908B1 (ko) * 2003-08-22 2005-06-23 엠엠기어 주식회사 다채널 헤드폰의 스피커 모듈 조립체
JP4995962B2 (ja) * 2010-10-23 2012-08-08 博司 行俊 聴診器
JP4707160B2 (ja) * 2011-01-27 2011-06-22 克己 赤須 ヘッドホン
KR101287086B1 (ko) 2011-11-04 2013-07-17 한국전자통신연구원 멀티미디어 재생 장치 및 방법
TR201903435A2 (tr) * 2019-03-06 2019-03-21 Mehmet Tunc Turgut Çevresel olarak ses veri̇ci̇ unsurlar i̇le donatilmiş hoparlör bi̇ri̇mleri̇ bulunduran kulak üstü kulaklik yapilanmasi

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPS63318900A (ja) * 1987-06-22 1988-12-27 Foster Denki Kk サラウンド・ヘッドホン
JPH01314098A (ja) * 1988-06-13 1989-12-19 Foster Electric Co Ltd サラウンド・ヘッドホン

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DE2329851C2 (de) * 1973-06-12 1975-08-14 Neckermann Versand Kgaa, 6000 Frankfurt Kopfhörer für die Wiedergabe echter quadrophon aufgenommener Informationen
US6038330A (en) * 1998-02-20 2000-03-14 Meucci, Jr.; Robert James Virtual sound headset and method for simulating spatial sound

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63318900A (ja) * 1987-06-22 1988-12-27 Foster Denki Kk サラウンド・ヘッドホン
JPH01314098A (ja) * 1988-06-13 1989-12-19 Foster Electric Co Ltd サラウンド・ヘッドホン

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1330935A4 *

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1338172A4 (fr) * 2000-10-13 2006-06-07 Mm Gear Co Ltd Accessoire de casque
FR2854537A1 (fr) * 2003-04-29 2004-11-05 Hong Cong Tuyen Pham Casque acoustique pour la restitution spatiale d'un son.
WO2004098235A1 (fr) * 2003-04-29 2004-11-11 Pham Hong Cong Tuyen Casque acoustique pour la restitution spatiale d’un son.
US7532734B2 (en) 2003-04-29 2009-05-12 Pham Hong Cong Tuyen Headphone for spatial sound reproduction
CN1781336B (zh) * 2003-04-29 2012-06-27 洪·崇·图延·费姆 立体声再现的头戴收发话器
RU2260254C2 (ru) * 2004-05-19 2005-09-10 Пыльнев Михаил Александрович Устройство наушников для воспроизведения звука
WO2010106957A1 (fr) * 2009-03-17 2010-09-23 Akasu Katsumi Ecouteur
US11617045B2 (en) 2014-01-06 2023-03-28 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11974097B2 (en) 2014-01-06 2024-04-30 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11706574B2 (en) 2014-01-06 2023-07-18 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11582563B2 (en) 2014-01-06 2023-02-14 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11582564B2 (en) 2014-01-06 2023-02-14 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
US11570556B2 (en) 2014-01-06 2023-01-31 Shenzhen Shokz Co., Ltd. Systems and methods for suppressing sound leakage
EP3488622A4 (fr) * 2016-07-20 2019-05-29 Razer (Asia-Pacific) Pte Ltd. Casques d'écoute et procédés de configuration d'un casque d'écoute
US10791391B2 (en) 2016-07-20 2020-09-29 Razer (Asia-Pacific) Pte. Ltd. Headsets and methods for configuring a headset
WO2018017012A1 (fr) 2016-07-20 2018-01-25 Razer (Asia-Pacific) Pte. Ltd. Casques d'écoute et procédés de configuration d'un casque d'écoute
US11425481B2 (en) 2019-04-30 2022-08-23 Shenzhen Shokz Co., Ltd. Open earphone
US11356763B2 (en) 2019-04-30 2022-06-07 Shenzhen Shokz Co., Ltd. Open earphone
US11457301B2 (en) 2019-04-30 2022-09-27 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11496824B2 (en) 2019-04-30 2022-11-08 Shenzhen Shokz Co., Ltd. Acoustic output apparatus with drivers in multiple frequency ranges and bluetooth low energy receiver
US11516572B2 (en) 2019-04-30 2022-11-29 Shenzhen Shokz Co., Ltd. Acoustic output device
US11540037B2 (en) 2019-04-30 2022-12-27 Shenzhen Shokz Co., Ltd. Open earphone
US11540038B2 (en) 2019-04-30 2022-12-27 Shenzhen Shokz Co., Ltd. Acoustic device
US11425482B2 (en) 2019-04-30 2022-08-23 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11570536B2 (en) 2019-04-30 2023-01-31 Shenzhen Shokz Co., Ltd. Acoustic output apparatus and methods thereof
US11445281B2 (en) 2019-04-30 2022-09-13 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11178477B2 (en) 2019-04-30 2021-11-16 Shenzhen Voxtech Co., Ltd. Acoustic output apparatus with a plurality of acoustic drivers and methods thereof
US11159870B2 (en) 2019-04-30 2021-10-26 Shenzhen Voxtech Co., Ltd. Acoustic output apparatus
US11671738B2 (en) 2019-04-30 2023-06-06 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11678098B2 (en) 2019-04-30 2023-06-13 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11122359B2 (en) 2019-04-30 2021-09-14 Shenzhen Voxtech Co., Ltd. Acoustic output apparatus and method thereof
US11818529B2 (en) 2019-04-30 2023-11-14 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US11115774B2 (en) 2019-04-30 2021-09-07 Shenzhen Voxtech Co., Ltd. Acoustic output apparatus
US12126953B2 (en) 2019-04-30 2024-10-22 Shenzhen Shokz Co., Ltd. Acoustic output apparatus
US12160696B2 (en) 2019-04-30 2024-12-03 Shenzhen Shokz Co., Ltd. Acoustic output apparatus

Also Published As

Publication number Publication date
AU1896901A (en) 2002-04-02
EP1330935A4 (fr) 2006-05-17
KR100335171B1 (en) 2002-05-11
EP1330935A1 (fr) 2003-07-30
JP3681375B2 (ja) 2005-08-10
JP2004509541A (ja) 2004-03-25
CN1454444A (zh) 2003-11-05

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