BONE-CONDUCTION NOISE CANCELLING HEADPHONES

BONE-CONDUCTION NOISE CANCELLING HEADPHONES

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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NAKAGAWA TOORU, KUWABARA MITSUTAKA
Format: Patent
Sprache:eng
Schlagworte:
ACOUSTICS
ACOUSTICS NOT OTHERWISE PROVIDED FOR
METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL
MUSICAL INSTRUMENTS
PHYSICS
SOUND-PRODUCING DEVICES
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Beschreibung
Zusammenfassung: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.