Microphone for hearing aid and communications applications having switchable polar and frequency response characteristics
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United States of America Patent
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Jul 17, 2007
Grant Date -
Aug 4, 2005
app pub date -
Apr 5, 2005
filing date -
Jul 12, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A microphone assembly generally for hearing aid and communications applications is disclosed. The microphone assembly operates in both directional and non-directional or omni-directional modes. The microphone assembly has front and rear sound inlet tubes, and an actuator switch that may be moved between a first position in which the rear tube is plugged, defining the omni-directional mode, and a second position in which the rear tube is unplugged, defining the directional mode. Circuitry senses the position of the actuator switch and selects a microphone output based on the position sensed.
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