A digital wireless telecommunication device for reduced interference with hearing aids includes an assistive listening device detector. The assistive listening device detector identifies the presence of different types of assistive listening device signals. In response to such a signal, the assistive...http://www.google.com.hk/patents/US5883927?utm_source=gb-gplus-share專利 US5883927 - Digital wireless telecommunication device for reduced interference with hearing aids
