Invention Grant
- Patent Title: Ambient noise reduction arrangements
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Application No.: US17406453Application Date: 2021-08-19
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Publication No.: US11620975B2Publication Date: 2023-04-04
- Inventor: Alastair Sibbald
- Applicant: Cirrus Logic International Semiconductor Ltd.
- Applicant Address: GB Edinburgh
- Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee: Cirrus Logic International Semiconductor Ltd.
- Current Assignee Address: GB Edinburgh
- Agency: Blank Rome LLP
- Priority: GB0601536 20060126
- Main IPC: G10K11/178
- IPC: G10K11/178 ; H04R1/10

Abstract:
A feedforward ambient noise reduction arrangement includes, within a housing, a loudspeaker device for directing sound energy into an ear of a listener. Disposed externally of the housing, and positioned to sense ambient noise on its way to the listener's ear, are plural microphone devices capable of converting the sensed ambient noise into electrical signals for application to the loudspeaker to generate an acoustic signal opposing the ambient noise. Importantly, the overall arrangement is such that the acoustic signal is generated by said loudspeaker means in substantial time alignment with the arrival of said ambient noise at the listener's ear.
Public/Granted literature
- US20210383785A1 AMBIENT NOISE REDUCTION ARRANGEMENTS Public/Granted day:2021-12-09
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