[특허]Two-way communications earset

Two-way communications earset 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04M-001/00 H04R-025/00
출원번호	US-0413928 (1995-03-30)
우선권정보	JP-0306453 (1992-10-20); JP-0082783 (1993-03-17)
발명자 / 주소	Yamaguchi Noboru (Yokohama JPX) Konomi Masao (Tokyo JPX)
출원인 / 주소	Pan Communications, Inc. (Tokyo JPX 03)
인용정보	피인용 횟수 : 53 인용 특허 : 0

초록 ▼

A one-piece two-way voice communication earset is situated in or at the ear of the user and is operated hands-free. It includes either two separated microphones having their outputs combined or a single bidirectional microphone. In either case, the earset treats the user\s voice as consisting of out-of-phase signals that are not canceled, but treats ambient noise, and any incidental feedback of sound from received voice signals, as consisting of signals more nearly in-phase that are canceled or greatly reduced in level. The microphones are preferably electret microphones. In addition, a logarithmic amplification circuit reduces residual ambient noise during non-speaking intervals. The earset includes a receiver coupled to a communication medium and a speaker coupled to the receiver for emitting sound from received voice signals primarily to the user\s ear canal. A transmitter, a part of the earset also coupled to the communication medium and located outside the ear canal, houses the two microphones or the one bidirectional microphone.

대표청구항 ▼

A one piece two-way simultaneous voice communication signals transmitting and receiving device comprising: a receiver responding to an incoming electrical signal of the two-way simultaneous voice communication signals to emit sound to the ear canal of a user; and a transmitter, attached to the receiver for generating an outgoing electrical signal of the two-way simultaneous voice communication signals and located outside the ear canal, comprising: a microphone having two sound receiving ends and having bidirectional directivity for sound pickup with one of the two directions of the bidirectional directivity aimed toward the mouth of the user; a housing containing the microphone substantially at a central portion thereof and having first and second sound receiving ends corresponding to respective ones of the two sound receiving ends of the microphone; and two acoustically absorbing elements placed within the housing between the two sound receiving ends of the microphone and the first and second sound receiving ends of the housing, respectively, and absorbing signals that cause leaked sound feedback from the receiver to the microphone.

이 특허를 인용한 특허 (53)

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Tate Joseph B. ; Wolff Steven B. ; Rao Vidya Sagar, Element for a noise cancellation device.
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Eaton, Anthony M.; Ruzicka, Jerome C., Hearing aid systems.
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Callahan Thomas F., In-ear-canal audio receiver and stethoscope having the same.
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Lygas, Edward A., Method and apparatus to transmit audio into the human ear.
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Rasmussen,Karsten Bo; Laugesen,S��ren, Method for detection of own voice activity in a communication device.
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Brumitt, Marcia R.; Dyer, Medford A.; Springer, Edward D., Near-field speaker/microphone acoustic/seismic dampening communication device.
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Hagen,Lawrence T.; Preves,David A., Portable system for programming hearing aids.
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Morrill Jeffrey C. ; Jonas Gerald J., Radio communications apparatus with attenuating ear pieces for high noise environments.
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Pirelli Thomas, Self-contained earset communication device.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Two-way communications earset 원문보기

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이 특허를 인용한 특허 (53)

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