A sound reproduction system includes headphones (11). The headphones include structures for generating sound (4, 5) and microphones (6, 7). Further, the system includes filters (8,9) for filtering a signal such that the sound produced simulates external sound sources. The system includes a feed-back...http://www.google.fr/patents/US6829361?utm_source=gb-gplus-shareBrevet US6829361 - Headphones with integrated microphones
