| 摘要 |
PURPOSE:To improve the naturality of a sense of distance of acoustic image static by interlocking sound volume adjustment processing and frequency signal processing so as to generate a sense of distance for presence of acoustic image static in a voice conference using a loudspeaker telephone set or a video conference. CONSTITUTION:A sound volume adjustment section 13 adjusts the sound volume of a sound signal inputted from a sound signal input terminal 12 according to a sound volume value Vi transferred from a sound image distance setting section 16 and transfers the sound signal adjusted by the sound volume Vi to a frequency signal processing section 14. The frequency signal processing section 14 cuts off a low frequency with, e.g. a low frequency cut-off filter or emphasizes the high frequency or extracts a intermediate frequency with a band pass filter, the intermediate frequency is shifted to a high frequency with a frequency shifter or a low frequency is extracted by the low pass filter and the low frequency is shifted to a high frequency with the frequency shifter to form whisper or the high frequency is cut off with the high frequency cut-off to form a low-pitched voice. |
