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
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Application No.: US13655819Application Date: 2012-10-19
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Publication No.: US08948409B2Publication 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

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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