Patent ID: 7653203
Filing Date: 2010-01-26
Classification: H04R,H04S

Abstract:
1. A front/rear fade system for a multi-channel surround sound audio system for a vehicle, the surround sound audio system comprising a plurality of loudspeakers comprising front loudspeakers, intermediate loudspeakers, and rear loudspeakers, the front/rear fade system comprising: a first operating mode in which extreme “front” and “rear” positions of a fade control bias a relative amplitude of acoustic radiation respectively toward a front of a listening area or a rear of the listening area by varying relative amplitudes of output of each of the front loudspeakers, intermediate loudspeakers, and rear loudspeakers according to the position of the fade control, and a second operating mode in which the extreme “front” and “rear” positions of the fade control bias the relative amplitude of the acoustic radiation respectively toward an intermediate position of the listening area or the rear of the listening area by holding the amplitude of the output of the front loudspeakers constant for any position of the fade control and varying the relative amplitudes of output of each of the intermediate loudspeakers and rear loudspeakers according to the position of the fade control.