Patent ID: 6961439

Claim:
An apparatus comprising: a signal portion operable to provide audio signals corresponding to a sound to be reproduced and a virtual location of a source of the sound to be reproduced; a wearing portion to be worn by a person; a tracking system operable to provide tracking signals corresponding to an orientation and location of the head of the person; a head related transfer function (HRTF) filter; and speakers mounted on said wearing portion, wherein said HRTF filter is operable to spatially filter the audio signals, based on the tracking signals, and thereby provide spatially filtered audio signals, wherein said speakers are operable to reproduce the sound based on the spatially filtered audio signals such that the person hears the sound and perceives a maintained virtual location of the source of the sound, and wherein said speakers are mounted on said wearing portion at a position which augments the sound reproduced by said speakers such that perceived front-to-back reversals in the maintained virtual location of the source of the sound are reduced.