Sound-direction detector having a miniature sensor

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United States of America Patent

PATENT NO 8553903
APP PUB NO 20090003621A1
SERIAL NO

11769142

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Abstract

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A representative embodiment of the invention provides a sound-direction detector having a miniature sensor coupled to a signal-processing block. The sensor has (i) a microphone responsive to a sound wave and (ii) a differential pressure sensor (DPS) responsive to a pressure difference induced by the sound wave between two inlet ports located in proximity to the microphone. The signal-processing block applies phase-sensitive detection to the output signal generated by the DPS, while using the output signal generated by the microphone as a reference for the phase-sensitive detection, to measure the pressure difference. The signal-processing block then determines direction to the sound-wave source based on the amplitude of the sound wave at the microphone and the measured pressure difference.

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Patent Owner(s)

Patent OwnerAddress
ALCATEL LUCENTFRENCH BOULOGNE BILLANCOURT

International Classification(s)

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  • 2007 Application Filing Year
  • H04R Class
  • 1128 Applications Filed
  • 773 Patents Issued To-Date
  • 68.53 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2007200820092010201120122013201420152016201720180255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Greywall, Dennis S White House Station, US 53 1005

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  • 2 Citation Count
  • H04R Class
  • 2.47 % this patent is cited more than
  • 12 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges91861013815852101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7091 - 1000102030405060708090100110120130140150160170180190200

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