CPC H04R 3/04 (2013.01) [H04R 5/033 (2013.01); H04R 2460/01 (2013.01)] | 7 Claims |
1. A noise cancelling headphone comprising:
a headphone unit configured to output a sound wave corresponding to an audio signal;
a baffle plate to which the headphone unit is attached;
an ear pad attached to the baffle plate;
a housing attached to the baffle plate;
a first microphone configured to collect external noise outside the housing,
a first buffer amplifier unit configured to perform impedance conversion to a signal from the first microphone and output the impedance-converted signal;
a second microphone configured to collect internal noise inside a front air chamber formed by the headphone unit, the baffle plate, the ear pad, and a head of a user when the noise cancelling headphone is worn on the user's head;
a second buffer amplifier unit configured to perform impedance conversion to a signal from the second microphone and output the impedance-converted signal; and
a noise cancelling signal generation circuit configured to generate a noise cancelling signal, based on a combined signal by combining a signal from the first buffer amplifier unit with a signal from the second buffer amplifier unit.
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