Invention Application
- Patent Title: FREQUENCY-DEPENDENT SIDETONE CALIBRATION
- Patent Title (中): 频率依赖的SIDETONE校准
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Application No.: PCT/US2015/018742Application Date: 2015-03-04
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Publication No.: WO2015134617A1Publication Date: 2015-09-11
- Inventor: KALLER, Roy, Scott , HENDRIX, Jon, D.
- Applicant: CIRRUS LOGIC, INC.
- Applicant Address: 800 W 6th St Austin, TX 78701 US
- Assignee: CIRRUS LOGIC, INC.
- Current Assignee: CIRRUS LOGIC, INC.
- Current Assignee Address: 800 W 6th St Austin, TX 78701 US
- Agency: HARRIS, Andrew, Mitchell
- Priority: US14/197,814 20140305
- Main IPC: H04M1/58
- IPC: H04M1/58 ; H04M9/08
Abstract:
A personal audio device includes a sidetone circuit with one or more adjustable coefficients that generates a sidetone signal from the output of a first microphone. The sidetone circuit has one or more adjustable coefficients for altering the relationship between the first microphone signal and the sidetone signal. The personal audio device also includes a transducer for reproducing playback audio and the sidetone signal at an ear of a listener and a second microphone for measuring the output of the transducer as delivered to the ear of the listener. The sidetone circuit includes a calibration circuit for estimating a response of the second microphone to the sidetone signal and adjusting the coefficient of the sidetone circuit according to the estimated response.
Information query
