| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a signal processor in which blowing noise, generated when inputting voice or the like to a microphone, or outdoor noise due to wind can be reduced automatically by a simple configuration.SOLUTION: A signal processor for reducing low frequency noise components from an input acoustic signal includes: filter means for attenuating the frequency components equal to or lower than a set cut-off frequency; calculation means for acquiring the spectrum of the input acoustic signal at every predetermined time and calculating the average of the spectrum values for every predetermined multiple object frequencies; and set means for setting the cut-off frequency, determined based on the average of the spectrum values of respective object frequencies, as the cut-off frequency of the filter means.</p> |
