Invention Grant
US08948409B2 Audio headset with active noise control of the non-adaptive type for listening to an audio music source and/or for “hands-free” telephony functions 有权
具有用于收听音频音源和/或“免提”电话功能的非自适应类型的主动噪声控制的音频耳机

  • Patent Title: Audio headset with active noise control of the non-adaptive type for listening to an audio music source and/or for “hands-free” telephony functions
  • Patent Title (中): 具有用于收听音频音源和/或“免提”电话功能的非自适应类型的主动噪声控制的音频耳机
  • Application No.: US13655819
    Application Date: 2012-10-19
  • Publication No.: US08948409B2
    Publication Date: 2015-02-03
  • Inventor: Phong Hua
  • Applicant: Parrot
  • Applicant Address: FR Paris
  • Assignee: Parrot
  • Current Assignee: Parrot
  • Current Assignee Address: FR Paris
  • Agency: Haverstock & Owens LLP
  • Priority: FR1160642 20111122
  • Main IPC: G10K11/16
  • IPC: G10K11/16 H04R1/10 H04R5/033
Audio headset with active noise control of the non-adaptive type for listening to an audio music source and/or for “hands-free” telephony functions
Abstract:
The headset comprises two earpieces each having a transducer for playing back the sound of an audio signal and received in an acoustic cavity defined by a shell having an ear-surrounding cushion. The active noise control comprises, in parallel, a feedforward bandpass filter receiving the signal from an external microphone, a feedback bandpass filter receiving as input an error signal delivered by an internal microphone, and a stabilizer bandpass filter locally increasing the phase of the transfer function of the feedback filter in an instability zone, in particular a waterbed effect zone around 1 kHz. A summing circuit delivers a weighting linear combination of the signal delivered by these filters together with the audio signal to be played back. Control is non-adaptive, with the parameters of the filters being static.
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