| 摘要 |
PROBLEM TO BE SOLVED: To reduce, when recording voices from right and left channels, noise of the voice of each channel at high precision, even if environmental sounds or drive sounds change.SOLUTION: According to the sum of an amplitude spectrum obtained from a first microphone and an amplitude spectrum obtained from a second microphone, and the difference of the amplitude spectrum obtained from the first microphone and the amplitude spectrum obtained from the second microphone, whether or not to use a first noise profile and whether or not to use a second noise profile are controlled so as to reduce drive noise from driving means.SELECTED DRAWING: Figure 2 |
