Audio diaphragm mounting arrangements in radio telephone handsets

摘要

A radio telephone handset including a housing for retaining an audio diaphragm means, the housing having an aperture therein for receiving the diaphragm means, the diaphragm co-operating with the housing to define a substantially sealed chamber, the arrangement being such that an inward face of the audio diaphragm means is enclosed by the substantially sealed chamber and is thereby substantially acoustically isolated from a outward face of the diaphragm.