WIRELESS HEARING ASSISTANCE SYSTEM AND METHOD

摘要

The invention relates to a system for providing hearing assistance to at least one user (13), comprising a plurality of transmission units (10, 100), each comprising a microphone arrangement (17) for capturing audio signals and a digital transmitter (28, 128) for applying a digital modulation scheme in order to transmit the audio signals as audio data packets via a wireless digital audio link (12, 12'); at least one receiver unit (14, 100) to be worn at or at least in part in the user's ear; a relay unit (15), comprising a mixing unit (38) for mixing the audio signals received from the transmission units into a mixed audio signal and at least one digital transceiver (36, 36', 36A, 36B) for receiving audio signals from the transmission units via the digital audio link and for transmitting the mixed audio signal via the wireless digital audio link as audio data packets to the receiver unit(s), with each receiver unit comprising a digital receiver (48, 128) for reception of audio signals from the relay unit via the digital audio link; means (60, 68) for stimulating the hearing of the user(s) according to audio signals supplied from the receiver unit, wherein the relay unit and each transmission unit is adapted to transmit each audio data packet in at least one allocated separate slot of a TDMA frame at a different frequency according to a frequency hopping sequence.