A lightweight, monaural communications headset is disclosed which is readily adjustable to be worn on either the right or left ear of a wearer. The disclosed headset consists of two housings, one for holding electronic circuitry for the headset, and the other for holding an acoustical transmitter. The...http://www.google.com.au/patents/US4917504?utm_source=gb-gplus-sharePatent US4917504 - Communications headset
