Noise canceling headphone and noise canceling earmuff
First Claim
1. A noise canceling headphone comprising:
- a microphone provided in a headphone housing, the microphone configured for collecting an external sound and outputting a microphone signal, the external sound including a first component passing through the headphone housing without being substantially attenuated by a sound insulating characteristic of the noise canceling headphone and a second component having a substantial amount of attenuation by the sound insulating characteristic of the noise canceling headphone;
a canceling signal generating circuit generating a canceling signal in response to the microphone signal, the canceling signal cancels the first component of the external sound;
a compensating signal generating circuit generating a compensating signal, the compensating signal compensates for the second component of the external sound;
an adding circuit configured for adding a musical signal input to the compensating signal and generating an adding signal; and
a speaker unit outputting the adding signal and the canceling signal,wherein the compensating signal generating circuit is a filter circuit that generates the compensating signal for compensating the amount of substantial attenuation in a frequency band characteristic corresponding to the second component of the external sound in response to the microphone signal.
1 Assignment
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Accused Products
Abstract
A noise canceling headphone includes a microphone provided in a headphone housing, collecting external sound, a canceling signal generating circuit generating a canceling signal in response to a signal output from the microphone which cancels external sound passing through the housing without being attenuated by a sound insulating characteristic of the headphone, a compensating signal generating circuit generating a compensating signal that compensates for the external sound attenuated by the sound insulating characteristic of the headphone, an adding circuit that adds a musical signal input from the exterior to the compensating signal, and a speaker unit that outputs an output signal from the adding circuit and the canceling signal.
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Citations
11 Claims
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1. A noise canceling headphone comprising:
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a microphone provided in a headphone housing, the microphone configured for collecting an external sound and outputting a microphone signal, the external sound including a first component passing through the headphone housing without being substantially attenuated by a sound insulating characteristic of the noise canceling headphone and a second component having a substantial amount of attenuation by the sound insulating characteristic of the noise canceling headphone; a canceling signal generating circuit generating a canceling signal in response to the microphone signal, the canceling signal cancels the first component of the external sound; a compensating signal generating circuit generating a compensating signal, the compensating signal compensates for the second component of the external sound; an adding circuit configured for adding a musical signal input to the compensating signal and generating an adding signal; and a speaker unit outputting the adding signal and the canceling signal, wherein the compensating signal generating circuit is a filter circuit that generates the compensating signal for compensating the amount of substantial attenuation in a frequency band characteristic corresponding to the second component of the external sound in response to the microphone signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A noise canceling earmuff comprising:
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a microphone provided in a earmuff housing, the microphone configured for collecting an external sound and outputting a microphone signal, the external sound including a first component passing through the earmuff housing without being substantially attenuated by a sound insulating characteristic of the noise canceling earmuff and a second component having a substantial amount of attenuation by the sound insulating characteristic of the noise canceling earmuff; a canceling signal generating circuit generating a canceling signal in response to the microphone signal, the canceling signal cancels the first component of the external sound; a compensating signal generating circuit generating a compensating signal, the compensating signal compensates for the second component of the external sound; and a speaker unit outputting the compensating signal and the canceling signal, wherein the compensating signal generating circuit is a filter circuit that generates the compensating signal for compensating the amount of substantial attenuation in a frequency band characteristic corresponding to the second component of the external sound in response to the microphone signal.
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Specification