Ambient noise reduction arrangement

Ambient noise reduction arrangement

  • CN 101,375,328 B
  • Filed: 01/17/2007
  • Issued: 07/02/2014
  • Est. Priority Date: 01/26/2006
  • Status: Active Grant
First Claim
Patent Images

1. an ambient noise reduction arrangement, comprises a chamber;

  • A speaker unit, this speaker unit supports and is placed in described chamber, for acoustic energy being imported to hearer'"'"'s ear in the time that this speaker unit is placed near the porch of the duct of ear;

    Multiple microphone apparatus, the plurality of microphone apparatus is positioned at described chamber outside in the mode of distributive array, be positioned at around described speaker unit, and be placed for detection of the neighbourhood noise near described entry position and for the neighbourhood noise detecting is converted to electric signal;

    And feed forward circuit device, it is for an electric signal is applied to described loudspeaker, to produce an acoustic signal contrary with described neighbourhood noise;

    Carry out above-mentioned layout, described acoustic signal is roughly produced in consistent time arriving described entry position with described neighbourhood noise by described speaker unit.

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