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Adjustable filter for differential microphones

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04R-003/00
출원번호 US-0226139 (1994-04-11)
발명자 / 주소
  • Elko Gary W. (Summit NJ) Kubli Robert A. (Milford NJ) Morgan Dennis R. (Morristown NJ) West James E. (Plainfield NJ)
출원인 / 주소
  • Lucent Technologies Inc. (Murray Hill NJ 02)
인용정보 피인용 횟수 : 22  인용 특허 : 10

초록

A method and apparatus for providing a differential microphone with a desired frequency response are disclosed. The desired frequency response is provided by operation of a filter, having an adjustable frequency response, coupled to the microphone. The frequency response of the filter is set by oper

대표청구항

A method for providing a differential microphone with a desired frequency response, the differential microphone coupled to a filter having a frequency response which is adjustable, the method comprising the steps of: determining a distance between the differential microphone and a desired source of

이 특허에 인용된 특허 (10)

  1. Elko Gary W. (Summit NJ) Kubli Robert A. (Milford NJ) Morgan Dennis R. (Morristown NJ) West James E. (Plainfield NJ), Adjustable filter for differential microphones.
  2. Negishi Hirokazu (Epsom Surrey GBX) Hosaka Masao (Sagamihara JPX), Audio signal transmission system.
  3. Poldy Carlo (Vienna ATX) Hopfmller Gebhard (Vienna ATX), Circuit for suppressing amplitude peaks caused by stop consonants in an electroacoustic transmission system.
  4. Ribic Zlatan (Vienna ATX), Hearing aid for persons with an impaired hearing faculty.
  5. Feldman Stanley (Evanston IL) Koch Gary (Arlington Heights IL), Hearing aid with controllable wide range of frequency response.
  6. Slater Robert W. (48 W. 938 Chandelle Dr. Hampshire IL 60140), Intercom apparatus for integrating disparate audio sources for use in light aircraft or similar high noise environments.
  7. Kahn David A. (Nepean CAX), Microphone arrangement.
  8. Elko Gary W. (Summit NJ) Flanagan James L. (Warren NJ) Johnston James D. (Warren NJ), Sound location arrangement.
  9. Ishigaki Yukinobu (Machida JPX) Totsuka Kaoru (Tokyo JPX) Yamamoto Makoto (Yokosuka JPX) Miyaji Naotaka (Yamato JPX), Variable-directivity microphone device.
  10. Ishigaki Yukinobu (Machida JPX) Totsuka Kaoru (Tokyo JPX) Yamamoto Makoto (Yokosuka JPX) Miyaji Naotaka (Yamato JPX), Variable-directivity microphone device.

이 특허를 인용한 특허 (22)

  1. Ma,Wei; Bahai,Ahmad, Active sensor circuitry for operating at low power and low duty cycle while monitoring occurrence of anticipated event.
  2. Ma, Wei; Bahai, Ahmad, Adaptive amplifier circuitry for microphone array.
  3. Elko,Gary W.; Teutsch,Heinz, Adaptive close-talking differential microphone array.
  4. Taenzer, Jon C., Beam former using phase difference enhancement.
  5. Taenzer, Jon C., Beam former using phase difference enhancement.
  6. Ma, Wei; Bahai, Ahmad, Differential microphone assembly.
  7. Taenzer, Jon C.; Spicer, Bruce G., Method and apparatus for accommodating device and/or signal mismatch in a sensor array.
  8. Taenzer,Jon C.; Spicer,Bruce G., Method and apparatus for accommodating device and/or signal mismatch in a sensor array.
  9. Taenzer, Jon C.; Spicer, Bruce G., Method and apparatus for improving noise discrimination in multiple sensor pairs.
  10. Taenzer, Jon C.; Spicer, Bruce G., Method and apparatus for improving noise discrimination in multiple sensor pairs.
  11. Taenzer,Jon C.; Spicer,Bruce G., Method and apparatus for improving noise discrimination in multiple sensor pairs.
  12. Maisano, Joseph; Hottinger, Werner, Method for electronically beam forming acoustical signals and acoustical sensor apparatus.
  13. Poletti,Mark Alistair, Microphone arrays for high resolution sound field recording.
  14. Fontana, Federico; Bricchi, Mario, Process for noise reduction, particularly for audio systems, device and computer program product therefor.
  15. Elko, Gary W.; Teutsch, Heinz, Second-order adaptive differential microphone array.
  16. Bobisuthi, James F., Signal expander with discrimination between close and distant acoustic source.
  17. Rasmussen,Erik Witthoefft, Sound processing system including forward filter that exhibits arbitrary directivity and gradient response in single wave sound environment.
  18. Koji Higuchi JP, Speech communication apparatus and method for transmitting speech at a constant level with reduced noise.
  19. Taenzer,Jon C., System and method for improving time domain processed sensor signals.
  20. Griffin, Michael R., System and method for steering the directional response of a microphone to a moving acoustic source.
  21. Barbier, Dominique Paul; Yang, Xiaoyong, TOF based gain control.
  22. Murase,Kentaro; Noda,Takuya; Watanabe,Kazuhiro, Wave signal processing system and method.
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