| 摘要 |
PROBLEM TO BE SOLVED: To provide an audio device for listening to a music even in a noisy situation in the same way as a situation that there is not any noise as much as possible. SOLUTION: A gain/signal characteristics in various kinds of noise levels are preliminarily stored in a memory MM of a loudness compensation gain calculating part 8. A noise signal is separated from the output of a microphone 7 by a signal separating part 6, and inputted to the loudness compensation gain calculating part 8 with a music signal. The loudness compensation gain calculating part 8 wavelet converts those signals, and detects the level for each frequency band, and calculates the optimal gain for each frequency band by referring to the gain/signal characteristics stored in the memory MM, and sets it at a filter 3 for correction. The filter 3 for correction adds the gain to the music signal, and supplies it to a loudspeaker 5. |
