CORDLESS TELEPHONE HANDSET HAVING A WIDE PASSBAND ELECTROACOUSTIC CHAIN
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United States of America Patent
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Issued Date -
Jun 2, 2011
app pub date -
Jul 30, 2009
filing date -
Aug 4, 2008
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Abstract
A wireless telephone handset includes a processing unit having associated therewith a microphone, an earpiece, and a loudspeaker mounted on a wall of an enclosure provided with a vent having dimensions adapted to co-operate with the enclosure to form a Helmholtz resonator.
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