BONE-CONDUCTION NOISE CANCELLING HEADPHONES
First Claim
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1. A headphone which inhibits noise generated within an ear structure by vibration transmitted through bone, the headphone comprising:
- a motion sensor which detects motion of a head based on the vibration and outputs a motion signal;
a first cancelling circuit which delays the motion signal by a delay time and generates a first noise cancelling acoustic signal by inverting a phase of the motion signal; and
an acoustic driver which is driven by the first noise cancelling acoustic signal and generates a first cancelling acoustic wave.
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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.
15 Citations
9 Claims
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1. A headphone which inhibits noise generated within an ear structure by vibration transmitted through bone, the headphone comprising:
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a motion sensor which detects motion of a head based on the vibration and outputs a motion signal; a first cancelling circuit which delays the motion signal by a delay time and generates a first noise cancelling acoustic signal by inverting a phase of the motion signal; and an acoustic driver which is driven by the first noise cancelling acoustic signal and generates a first cancelling acoustic wave. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for inhibiting noise generated within an ear structure by vibration transmitted through bone by a headphone, the method comprising:
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detecting motion of a head based on the vibration and outputting a motion signal, delaying the motion signal by only a delay time and generating a first noise cancelling acoustic signal by inverting a phase of the motion signal; and generating a first cancelling acoustic wave by the first noise cancelling acoustic signal within the headphone.
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Specification