发明授权
US4558460A Audio apparatus for vehicle 失效
汽车音响设备

Audio apparatus for vehicle
摘要:
An audio apparatus for a vehicle is disclosed having an audio signal generator, an amplifier operatively connected to the generator for amplifying an audio signal received from the generator, a speaker for emitting sounds and which is driven by the amplifier, a vehicle speed detector, and a gain control operatively connected to the speed detector for generating a control signal and providing it to the amplifier, such that the control signal increases the gain of the amplifier according to an increase in the output of the vehicle speed detector.
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