Electret condenser microphone
Electret microphone
Electret microphone
Electret microphone
Electret microphone and method of assembling the same
Electret microphone shield
Electret microphone with simplified electrical connections...
Electret transducer
Electret transducer
Electret transducer and method of making the same
Electret transducer array and fabrication technique
Electret transducer backplate, electret transducer and...
Electret transducer with a selectively metalized backplate
Electret transducer with variable actual air gap
Electret transducer with variable effective air gap
Electret transducer with variable electret foil thickness
Electret transducer with variably charged electret foil
Electrets from plasma polymerized material
Electric hearing aid
Electric signal processing for electroacoustic transducer