| 摘要 |
PURPOSE: To reduce a noise component on a time spectrum pattern by estimating differences in amplitude and phase between two microphone outputs with respect to each of signal components subjected to band division by band-pass filter and using a signal corrected in accordance with them. CONSTITUTION: A speaking microphone 1 for input of a voice signal, a sensor microphone for input of a noise signal, and a band-pass filter bank 5 to which both signals are inputted are provided. The difference in phase between outputs of two microphones 1 and 2 is obtained with respect to each of signal components subjected to band division by band-pass filter bank 5, and the noise in each band is removed by the signal corrected in accordance with this difference. Thus, the noise component mixed into a time-spectrum pattern is removed. |
