Invention Grant
- Patent Title: Controlling ambient sound volume
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Application No.: US14950448Application Date: 2015-11-24
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Publication No.: US09949017B2Publication Date: 2018-04-17
- Inventor: John Allen Rule , Daniel M. Gauger, Jr.
- Applicant: Bose Corporation
- Applicant Address: US MA Framingham
- Assignee: Bose Corporation
- Current Assignee: Bose Corporation
- Current Assignee Address: US MA Framingham
- Main IPC: H04B15/00
- IPC: H04B15/00 ; H04R1/10 ; H04R3/04 ; H04R29/00 ; H04R1/00 ; H04R3/00

Abstract:
An earpiece includes a feed-forward microphone coupled to the environment outside the headphones, a feedback microphone coupled to an ear canal of a user when the earpiece is in use, a speaker coupled to the ear canal of the user when the earpiece is in use, a digital signal processor implementing feed-forward and feedback noise compensation filters between the respective microphones and the speaker, and a memory storing an ordered sequence of sets of filters for use by the digital signal processor. Each of the sets of filters includes a feed-forward filter that provides a different frequency-dependent amount of sound pass-through or cancellation, which in combination with residual ambient sound reaching the ear results in a total insertion gain at the ear of a user.
Public/Granted literature
- US20170150246A1 Controlling Ambient Sound Volume Public/Granted day:2017-05-25
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