Patent ID: 8401201
Filing Date: 2013-03-19
Classification: H04R,H04S

Abstract:
1. A sound processing apparatus for adjusting a sound signal to be output based on acoustic characteristics of a listening room, the apparatus comprising: a first acquisition unit configured to emit a test signal for measuring a standing wave state in the listening room from a loudspeaker, and acquire the test signal that has been emitted using a microphone; a determination unit configured to determine a peak position or a dip position due to a standing wave based on frequency characteristics of the signal acquired by the first acquisition unit; a second acquisition unit configured to emit a burst signal corresponding to a frequency of the peak position or the dip position from the loudspeaker in the listening room, and acquire the burst signal that has been emitted using the microphone; a calculation unit configured to calculate an increment ΔP of the signal acquired by the second acquisition unit, the ΔP indicating an amount of increase of a peak in a trailing edge portion corresponding to an end position of the burst signal relative to a peak in a portion corresponding to a stationary portion of the burst signal; and a filter unit configured to attenuate a frequency component of the peak position or the dip position of the sound signal to be output by an attenuation depending on the ΔP.