Harry F. Olson

Loudspeaker diaphragm support comprising plural compliant members

Line type pressure responsive microphone

Method and apparatus for noise control of reproduced sound

Transducer with fluid filled diaphragm suspension

Combination chassis and loudspeaker

Cabinet for sound translating apparatus

Suspension system for dynamic microphones

Acoustical resistance for pressure type microphones

Second order gradient directional microphone

Velocity type microphone