Active plus selective headset
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 29, 1998
Issued Date -
N/A
app pub date -
Jul 23, 1997
filing date -
Dec 2, 1994
priority date (Note) -
Expired
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Abstract
An active plus selective headset system for provision of active attenuation of broadband noise as well as speech filtering comprising a headset with reference microphones, residual microphones and speakers on each of a pair of open backed muffs and a controller means.
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