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Directional microphone system 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04B-001/06
  • H04M-001/20
출원번호 US-0795172 (1985-11-05)
발명자 / 주소
  • Hansen Per K. (Burlington VT)
출원인 / 주소
  • Position Orientation Systems (Burlington VT 02)
인용정보 피인용 횟수 : 37  인용 특허 : 5

초록

The present invention relates to an improved directional microphone system which utilizes at least two directional microphones. The microphones included in the system are connected to an electrical circuit which is programmed to cancel static noise and to facilitate dynamic gain control. The receive

대표청구항

A system for cancelling unwanted sound and noise from outside a well defined area comprising: (a) two directional microphones, each microphone being placed a distance away from a user and having a predetermined beam pattern; (b) preamplifier means electrically connected to each microphone. (c) multi

이 특허에 인용된 특허 (5)

  1. Flanagan James L. (Warren NJ), Directable microphone system.
  2. Miller Harry B. (Niantic CT), Electronic noise-reducing system.
  3. Kaneda, Yutaka; Ohga, Juro, Microphone-array apparatus and method for extracting desired signal.
  4. Miyaji, Naotaka; Sakamoto, Atsushi; Iwahara, Makoto, Phased-array sound pickup apparatus.
  5. Grunza Gene (Blackwood NJ), System for channel switching based on speech word versus noise detection.

이 특허를 인용한 특허 (37)

  1. Amiri,Maziar; Schulz,Dieter; Tetelbaum,Michael, Acoustic talker localization.
  2. Inha, Kai; Sladen, Peter, Audio processing based on changed position or orientation of a portable mobile electronic apparatus.
  3. Fan,Dashen, Cardioid beam with a desired null based acoustic devices, systems and methods.
  4. Holzrichter,John F.; Ng,Lawrence C., Characterizing, synthesizing, and/or canceling out acoustic signals from sound sources.
  5. Burnett,Gregory C., Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors.
  6. Stewart, Brett B., Directional microphone utilizing spaced apart omni-directional microphones.
  7. Marash Joseph,ILX, Dual-processing interference cancelling system and method.
  8. Hultz, Paul B.; Barksdale, Tobe; Dublin, Michael; Walters, Luke C., Estimation of synthetic audio prototypes with frequency-based input signal decomposition.
  9. Short, William R.; Walters, Luke C., Hearing assistance apparatus.
  10. Burnett, Gregory C., Light-based detection for acoustic applications.
  11. Ryan,Jim G.; Csermak,Brian D., Low-noise directional microphone system.
  12. Heck Larry P. ; Weintraub Mitchel, Method for establishing handset-dependent normalizing models for speaker recognition.
  13. Visser, Erik; Liu, Ernan, Microphone array subset selection for robust noise reduction.
  14. Burnett, Gregory C., Microphone array with rear venting.
  15. Burnett, Gregory C., Microphone array with rear venting.
  16. Bowen Donald J. (Madison NJ) Ciurpita ; Jr. Gregory (Somerset NJ), Microphone selection process for use in a multiple microphone voice actuated switching system.
  17. Chu Peter Lee (Lexington MA) Barton William F. (Littleton MA), Microphone system for teleconferencing system.
  18. Andrea Douglas ; Topf Martin, Noise cancellation apparatus.
  19. Arrowood,Jon A.; Miller,Michael S., Noise suppression in beam-steered microphone array.
  20. Zhang,Ming; Yu,Zhuliang; Lan,Hui, Post-processing scheme for adaptive directional microphone system with noise/interference suppression.
  21. Jones, Lawrence P., Remote audio surveillance for detection and analysis of wildlife sounds.
  22. Short, William R., Sound discrimination method and apparatus.
  23. Gardner William A., Sound environment control apparatus.
  24. Marash, Joseph; Berdugo, Baruch, Super directional beamforming design and implementation.
  25. Marash Joseph,ILX, System and method for adaptive interference cancelling.
  26. Holzrichter, John F.; Burnett, Greg C.; Ng, Lawrence C., System and method for characterizing synthesizing and/or canceling out acoustic signals from inanimate sound sources.
  27. Holzrichter, John F.; Burnett, Greg C.; Ng, Lawrence C., System and method for characterizing, synthesizing, and/or canceling out acoustic signals from inanimate sound sources.
  28. Mahieux Yannick (Tonquedec FRX) Le Tourneur Gregoire (St-Quay-Perros FRX) Saliou Alain (Lannion FRX), System for selective sound capture for reverberant and noisy environment.
  29. Joseph Marash IL; Baruch Berdugo IL, System, method and apparatus for cancelling noise.
  30. Terlizzi, Jeffrey J., Systems and methods for accelerometer usage in a wireless headset.
  31. Terlizzi, Jeffrey J., Systems and methods for noise cancellation and power management in a wireless headset.
  32. Terlizzi, Jeffrey J., Systems and methods for noise cancellation and power management in a wireless headset.
  33. Huang Jixiong ; Grinnell Richard S., Teleconferencing system with visual feedback.
  34. Reichel Kenneth R. (Hudson OH), Variable pattern microphone system.
  35. Burnett, Gregory C.; Breitfeller, Eric F., Voice activity detector (VAD)—based multiple-microphone acoustic noise suppression.
  36. Tamaru, Takuya, Voice conference system.
  37. Tamaru, Takuya, Voice conference system.
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