Abstract
An automotive audio speaker system includes a set of main speakers and a set of sub-speakers. The main speakers are distributed about the vehicle cabin so as to focus audio sound near the center thereof. The main speakers reproduce separate right and left audio channels, either singly or in groups, and the sub-speakers reproduce monaural sound resulting from combination of the right and left channels. The sub-speakers are arranged and operated in such a manner that the audio focus is divided and displaced to form a number of acoustic images, each coinciding with a passenger seat. Seat sensors capable of detecting the presence of a passenger in a corresponding seat may be used to control the operation of the sub-speakers, either by adjusting their relative volumes or by distributing the right and/or left audio channels thereamong.
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