×

Ambient noise reduction arrangements

  • US 9,786,264 B2
  • Filed: 06/17/2013
  • Issued: 10/10/2017
  • Est. Priority Date: 01/26/2006
  • Status: Active Grant
First Claim
Patent Images

1. A cellular telephone handset, comprising:

  • a housing,a loudspeaker mounted within the housing for generating sounds in response to signal, and for directing sound through a loudspeaker aperture to an entry location of a user'"'"'s ear when the handset is held with the loudspeaker facing the ear,a plurality of microphones positioned to sense ambient noise,a summer, connected to the plurality of microphones for receiving electrical signals generated by the microphones and for forming a summed electrical signal from the received electrical signals, wherein the summed electrical signal represents the ambient noise,noise cancellation circuitry for receiving the summed electrical signal, and for generating a noise cancellation signal, wherein the noise cancellation circuitry is connected to apply the noise cancellation signal to the loudspeaker,wherein an acoustic signal generated by the loudspeaker in response to the noise cancellation signal arrives at said entry location in substantial time alignment with the arrival of the ambient noise at said entry location.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×