Abstract: A face mask carries a voice communication device including a circular housing having voice transmitting openings and an annular seat which receives a flexible film diaphragm. The diaphragm is clamped to the seat by an inner circular member which has voice transmitting openings surrounding a socket for receiving a plug-in microphone. The housing receives an outer circular shield member which also has voice transmitting openings and defines a socket for receiving a plug on a microphone cord. Electrical conductor wires extend from the microphone socket through a passage around the diaphragm to the cord socket. A sealant material is injected into the passage and into an annular chamber which is defined between the housing and the inner microphone support member and receives a peripheral edge portion of the diaphragm.

Abstract: A portable self-contained amplified and loud speaker system and apparatus is disclosed herein having improved acoustical energy propagation in connection with musical sound distribution by a musician in a marching band or group. The apparatus includes cylindrical housing provided with shoulder and waist straps and a removable back plate shaped to fit the small of the back of the person wearing the housing. An electronic component package is secured within the housing so that a control panel is exposed for volume adjustment, recording tape insertion, start/stop switches and the like. Loudspeakers are angularly fixed to the opposite ends of the housing so as to close the ends thereof and are operably coupled to the components carried in the package for radiating acoustical energy in response to amplification of electrical signals processed by the components in a predetermined propagation pattern.