Microphone with adjustable properties
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United States of America Patent
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Aug 4, 2009
Grant Date -
Jan 11, 2007
app pub date -
May 6, 2004
filing date -
May 15, 2003
priority date (Note) -
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Abstract
The invention concerns a microphone with a membrane. The membrane has a first side which is in fluid contact with the surroundings and a second side which is facing a back chamber, where a barometric relief opening or vent opening is provided between the back chamber and the surroundings. According to the invention control means are provided for controlling the barometric relief opening.
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