Patent attributes
A surround sound system acquires a set of original channel signals as picked up or modeled by a set of microphones, located in a real or virtual acoustic space. Two microphones, mounted on or near the front of a head that may be real or artificial, are oriented to pick up the sounds emanating from the front. Two additional microphones are located near the ear canals of the head configured to emulate a human head in a manner that encodes the surround sound signals with a head-related transfer function (HRTF) that, in reproduction, enhances the accuracy and realism with which a listener perceives the various source locations. The head can be augmented, e.g. with small baffles strategically configured and located to modify the HRTF for overall accuracy and realism. Surround sound channels, so originated, may be transmitted for real-time reproduction or may be recorded, filtered, delayed, or otherwise processed and stored in memory for later reproduction. In an exemplary 4.0 surround sound listening system the listener is located facing a L/R pair of front loudspeakers and fitted with a L/R pair of small earbud loudspeakers located one at each ear near the canals in an aurally transparent manner that preserves normal hearing, e.g. with regard to the front channels. The listener experiences realistic perception of XY locations of various sound sources reproduced as originally located.
