Electric horn with means for controlling curvature of the...

Electric horn with solid state driver

Electro-acoustic signalling horns

Electro-acoustic sound diffuser

Electro-acoustic system

Electro-acoustical apparatus

Electro-acoustical apparatus

Electro-acoustical system

Electroacoustic calling device

Electroacoustic transducer

Electrode structure with constant velocity and predetermined...

Electrohydraulic pressure wave projectors

Electronic cancellation of d.c. motor noise

Electronic interrupter

Electronic sound synthesizer

Electronic stereo reverberation device with doubler

Electronic stereo reverberation device with doubler

Elk call

Embedded audio system in distributed acoustic sources

Engine or motor