| 摘要 |
PURPOSE:To easily and surely perform sound field control and localization control, and further take a howling countermeasure. CONSTITUTION:An enclosure 1 is fitted at the right upper part of a front seat, and a microphone 1c and speakers 1a and 1b are fitted thereto. Enclosures 2, 3, and 4 of similar constitution are fitted at the left upper part of the front seat and the right upper and left upper part of a rear seat respectively. The center position between the speakers of the respective enclosures is set to about 20cm before the position where the ears are position at a normal sitting attitude. The speakers 1a, 1b, 2a, 2b, 3a, 3b, 4a, and 4b fitted to the enclosures are so constituted that signals of Lch (channel) are reproduced on the sides (b) of the enclosures and signals of Rch (channel) are reproduced on the sides (a) respectively; and sounds in the intermediate frequency range and above (e.g. >=200Hz) are reproduced. |
