基本信息:
- 专利标题: WIDE DYNAMIC RANGE MICROPHONE
- 专利标题(中):宽动态范围麦克风
- 申请号:PCT/US2009044997 申请日:2009-05-22
- 公开(公告)号:WO2009143434A4 公开(公告)日:2010-07-22
- 发明人: HAILA OLLI , HARNEY KIERAN , ELKO GARY W , ADAMS ROBERT
- 申请人: ANALOG DEVICES INC , HAILA OLLI , HARNEY KIERAN , ELKO GARY W , ADAMS ROBERT
- 专利权人: ANALOG DEVICES INC,HAILA OLLI,HARNEY KIERAN,ELKO GARY W,ADAMS ROBERT
- 当前专利权人: ANALOG DEVICES INC,HAILA OLLI,HARNEY KIERAN,ELKO GARY W,ADAMS ROBERT
- 优先权: US5561108 2008-05-23
- 主分类号: H04R3/00
- IPC分类号: H04R3/00
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.
摘要(中):
麦克风系统具有输出以及具有第一动态范围的至少第一换能器,具有不同于第一动态范围的第二动态范围的第二换能器以及耦合系统以选择性地耦合第一换能器或第二换能器中的一个的输出 传感器连接到系统输出,根据输入声音信号的大小,生成一个动态范围大于任一个传感器动态范围的系统。 一种操作麦克风系统的方法包括检测换能器输出是否超过阈值,并且如果是,则选择性地将另一换能器的输出耦合到系统输出。 阈值可以根据哪个换能器耦合到系统输出而变化。 该系统和方法还可以根据时间或作为入射音频信号的幅度的函数,在从一个换能器输出到另一个换能器输出的过渡期间以加权总和组合多于一个换能器的输出。 操作系统的方法可以包括在将一个或多个输出耦合到系统输出之前均衡两个或更多个换能器的输出。
公开/授权文献:
- WO2009143434A3 WIDE DYNAMIC RANGE MICROPHONE 公开/授权日:2010-05-27