发明授权
- 专利标题: Wide dynamic range microphone
- 专利标题(中): 宽动态范围麦克风
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申请号: US14656637申请日: 2015-03-12
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公开(公告)号: US09407996B2公开(公告)日: 2016-08-02
- 发明人: Olli Haila , Kieran Harney , Gary W. Elko , Robert Adams
- 申请人: Invensense, Inc.
- 申请人地址: US CA San Jose
- 专利权人: INVENSENSE, INC.
- 当前专利权人: INVENSENSE, INC.
- 当前专利权人地址: US CA San Jose
- 代理机构: IPxLAW Group LLP
- 代理商 Maryam Imam
- 主分类号: H04R17/02
- IPC分类号: H04R17/02 ; H04R3/00 ; H04R1/40 ; H04R19/00
摘要:
A microphone system has an output and at least a first transducer with a first dynamic range, a second transducer with a second dynamic range different than the first dynamic range, and coupling system to selectively couple the output of one of the first transducer or the second transducer to the system output, depending on the magnitude of the input sound signal, to produce a system with a dynamic range greater than the dynamic range of either individual transducer. A method of operating a microphone system includes detecting whether a transducer output crosses a threshold, and if so then selectively coupling another transducer's output to the system output. The threshold may change as a function of which transducer is coupled to the system output. The system and methods may also combine the outputs of more than one transducer in a weighted sum during transition from one transducer output to another, as a function of time or as a function of the amplitude of the incident audio signal. Methods of operating the system may include equalizing the outputs of two or more transducers prior to coupling one or more outputs to the system output.
公开/授权文献
- US20150189445A1 Wide Dynamic Range Microphone 公开/授权日:2015-07-02
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