BONE-CONDUCTION NOISE CANCELLING HEADPHONES
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United States of America Patent
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Issued Date -
Jun 18, 2015
app pub date -
May 1, 2014
filing date -
Dec 17, 2013
priority date (Note) -
Abandoned
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Abstract
In a headphone which inhibits noise generated within an ear structure by vibration transmitted through bone, head motion based on vibration is detected by a motion sensor, and a motion signal is output. This motion signal is delayed by a delay time, and the phase of the motion signal is inverted to generate a first noise cancelling acoustic signal in the first cancelling circuit. An acoustic driver of the headphone is driven by the first noise cancelling acoustic signal to inhibit noise.
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