III;Denis Dupeyron;Scott Allan Miller;Scott Allan Miller, III
发明人:
Scott Allan Miller, III,Denis Dupeyron
申请号：
US13075813
公开号：
US09060229B2
申请日:
2011.03.30
申请国别(地区):
US
年份:
2015
代理人:
摘要：
An electret microphone having reduced noise due to reduced leakage current is provided. The microphone includes a flexible diaphragm, and sensor member disposed in opposing, spaced relation to the diaphragm and comprising a semi-conductor channel. At least one electret surface, comprised of a dielectric material having a permanently-embedded static electric charge, is disposed on one of the diaphragm and the sensor member. In turn, the semi-conductor channel of the sensor member has an electrical conductivity dependent upon relative movement of the diaphragm and support member responsive to acoustic signals incident upon the diaphragm, wherein the channel provides an output signal indicative of the acoustic signals. The electret surface may be disposed on the diaphragm. Alternatively, the electret surface may be disposed on the sensor member in spaced, face-to-face relation to an electrically conductive surface located on the diaphragm.
