A portable assistive listening system for enhancing sound for hearing impaired individuals includes a hearing aid and a separate handheld digital signal processing device. The hearing aid includes a microphone, a digital signal processor, a speaker, a power source, an ultra-wide band (UWB) transceiver,...http://www.google.es/patents/US20090074216?utm_source=gb-gplus-sharePatente US20090074216 - ASSISTIVE LISTENING SYSTEM WITH PROGRAMMABLE HEARING AID AND WIRELESS HANDHELD PROGRAMMABLE DIGITAL SIGNAL PROCESSING DEVICE
ASSISTIVE LISTENING SYSTEM WITH PROGRAMMABLE HEARING AID AND WIRELESS ...
