| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound signal processing apparatus capable of suppressing wind noise stably, and to provide a hearing aid using the same.SOLUTION: Conversion units 31R, 31L convert sound signals outputted from a pair of microphones 10R, 10L into sound component signals of respective frequency bands. A calculation unit calculates the phase difference of one sound component signal and the other sound component signal of respective frequency bands, for the sound component signal on the low frequency side, and calculates the sound pressure difference of one sound component signal and the other sound component signal of respective frequency bands, for the sound component signal on the high frequency side. Phase difference when a sound is inputted from a point sound source, upper limit and lower limit of the sound pressure difference of respective frequency bands, are stored in a memory 40. A determination unit 33 counts the number of frequency bands where the ratio of the phase difference, sound pressure difference obtained in the calculation unit and the phase difference, sound pressure difference stored in the memory goes above a predetermined value. When the value thus counted is larger than a predetermined value, a filter unit 34 filters the sound component signal of the frequency bands thus counted.SELECTED DRAWING: Figure 1 |
