1
Hiroshi Ono, Kazutoshi Mizoi: Wireless transmitting and receiving systems including ear microphones. Gen Engineering, Roylance Abrams Berdo & Farley, June 8, 1982: US04334315 (183 worldwide citation)

A wireless transmitting and receiving system includes an ear microphone of the vibration pick-up type for picking up bone-conducted voice signals through an external auditory ear canal wall of a wearer. A portable case is disposed adjacent the wearer's ear and a wireless device is attached adjacent ...


2
Wireless transmitting and receiving systems including ear microphones. Gen Engineering, January 7, 1981: GB2050768-A (2 worldwide citation)

L'INVENTION CONCERNE UN DISPOSITIF EMETTEUR ET RECEPTEUR SANS FIL UTILISANT UN MICROPHONE AURICULAIRE DU TYPE CAPTANT LES VIBRATIONS POUR CAPTER LES SIGNAUX VOCAUX CONDUITS PAR LES OS A TRAVERS LA PAROI DU CONDUIT AUDITIF EXTERNE DE L'UTILISATEUR DU MICROPHONE, UN BOITIER PORTABLE FIXE AUTOUR DE L'O ...