Patent ID: 6175633
Filing Date: 2001-01-16
Classification: H03G,H04B,H04R

Abstract:
A communications apparatus comprising:first and second ear units configured for placement in the respective ears of a person and including first and second transducers respectivelyat least one of said transducers including earphone means for receiving audio signals, converting said audio signals to audible sound, and for delivering said audible sound to the respective ear canal of the person,at least one of said transducers including microphone means for receiving audible sound and converting said audible sound to audio signals; anda control unit includingmeans for coupling with said transducers,means for coupling with a radio transceiver for receiving audio signals therefrom and for delivering audio signals so received to at least one of said transducers, and a VOX circuit including means for triggering in response to audio signals from at least one of said transducers and for delivering audio signals so received to a transceiver coupled therewith for radio transmission thereby,means for maintaining said VOX circuit in a trigger condition for a predetermined time of about two seconds after cessation of audio signals received from said at least one of said transducers,said ear units including respective ear pieces each including means for attenuating ambient sound by at least about 20 decibels and for attenuating ambient sound sufficiently to prevent triggering of said VOX circuit by attenuated ambient sound present in the ear canal of the person,said first transducer being operable as said microphone means, said second transducer being operable as said earphone means, said control unit including means for delivering audio signals representative of the person speaking and received from said first transducer simultaneously to a radio transceiver coupled therewith and to said second transducer as a side tone.