| 摘要 |
PROBLEM TO BE SOLVED: To bring the interior of a vehicle to an optimum sound field and an acoustic space to a listener at all times, independently of the state of a sun visor and to properly deliver voice information from a reproduction medium source such as a radio receiver or a navigation device to the listener. SOLUTION: An input signal control system 10 for a sun-visor speaker 11, that is fitted to a sun visor in the interior of a vehicle and reproduces a received signal, is equipped with a 1st detection means 15, that detects a tilt angle of the sun visor in forward backward directions and with adjustment means 13 that adjusts a frequency characteristics of the signal received by the sun-visor speaker 11, so as to obtain a prescribed frequency characteristics at a listening position on the basis of the information detected by the 1st detection means 15.
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