Sound emitter - Diaphragm

From International Dictionary of Marine Aids to Navigation
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3-2-180

Diaphragm (in an electrodynamic or electromagnetic sound emitter)

That part of the emitter which forms the principal sound radiating or receiving element; it usually consists of a rigid or semirigid membrane specially adapted to respond to or to generate sound.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM