DEVICE FOR REDUCING STRUCTURAL-ACOUSTICAL COUPLING BETWEEN THE DIAPHRAGM VIBRATION FIELD AND THE ENCLOSURE ACOUSTIC MODES

摘要

A novel cap for a telephone unit is provided to de-couple the loudspeaker diaphragm from the acoustic resonance in the enclosure and dampe n the first resonant frequency of the diaphragm. The cap has a flange located at a n outer edge thereof and a cavity provided in the cap. The cap cavity is sized to house an acoustical speaker that is directed outwardly through an aperture in an oute r casing of the telephone unit. The flange of the cap is coupled to the outer casing so that the cap covers the aperture. A gap is provided between the cap and the outer casing.