| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the deterioration of sound by adjusting output sound pressures for each of proper frequency bands in accordance with various environments for an input sound signal. <P>SOLUTION: A sound signal processing apparatus includes: a microphone 116 which collects the sound of pink noise, and converts the collected sound of pink noise into an electric signal; a characteristic deriving part 140 which derives a first transmission frequency characteristic by analyzing a sound pressure for each of a plurality of frequency bands of the electric signal; a difference calculation part 142 which calculates each difference of sound pressures of adjacent frequency bands in a plurality of frequency bands of the first transmission frequency characteristic; a boundary deriving part 144 which extracts, in order from a larger difference, one pair or more pairs of adjacent frequency bands in the first transmission frequency characteristic to derive boundary frequencies of adjacent frequency bands; an original sound division part which divides an original sound signal into signals for each of frequency bands divided by the boundary frequencies; a sound pressure adjustment part which adjusts sound pressures on the basis of the first transmission frequency characteristic; and a signal addition part 130 which adds signals of a plurality of frequency bands. <P>COPYRIGHT: (C)2011,JPO&INPIT |
