Patent ID: 7142686

Claim:
A compound sound generator for an information equipment comprising: a case of the equipment, the case having an inner surface; a frame set in the case; a speaker and receiver provided in the frame, the speaker having a first diaphragm and the receiver having a second diaphragm; a first protector and a second protector, each having sound discharge holes, secured to the frame for protecting the first diaphragm and the second diaphragm, respectively; a first back chamber behind the first diaphragm of the speaker and a second back chamber behind the second diaphragm of the receiver; first and second annular spacers provided between the inner surface of the case and the outer surfaces of the first protector and second protector, respectively, so as to surround the sound discharge holes of the protectors; openings provided in the frame to communicate the first and second back chambers with the inside space of the case so as to discharge sounds generated in the first and second back chambers; a baffle provided between the inner surface of the case and an outer surface of the frame so as to prevent airflow from one of the back chambers from flowing into the other back chamber.