Patent ID: 8774421
Filing Date: 2014-07-08
Classification: H04R

Abstract:
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.