Because of their small size, automobiles are a special challenge for implementing a surround sound experience. A comprehensive study explores the tradeoffs of practical implementations. A combination of simulations and experiments showed that inverse filtering is most effective for a single listener, especially in the rear seats. With more than one listener, other approaches are better because the number of inverse filters increases dramatically. The choice of processing depends on the source format: two-channel versus 5.1-channel input.
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