Acoustic transducer

An electret assembly for a microphone is disclosed. The microphone is adapted for use with a hearing aid. The electret assembly comprises a motor ring having first and second opposing peripheral surfaces and an aperture extending therebetween. The motor ring includes four generally co-planer ledges...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	WILLIAM J MURPHY, EUGENE M RING
Format:	Patent
Sprache:	eng
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS PUBLIC ADDRESS SYSTEMS
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Beschreibung
Zusammenfassung:	An electret assembly for a microphone is disclosed. The microphone is adapted for use with a hearing aid. The electret assembly comprises a motor ring having first and second opposing peripheral surfaces and an aperture extending therebetween. The motor ring includes four generally co-planer ledges recessed below the first opposing surface and defining a rectangle. A charged plate is disposed on the ledges. The charged plate is substantially flush with the first opposing surface. A flexible diaphragm is secured to the second opposing surface and extending across the aperture. A bead of epoxy secures the charged plate to the motor ring.