Development of PVF2 Lightweight Portable Loudspeaker.
Final technical rept.,
JMR SYSTEMS CORP DERRY NH
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A PVF2 Loudspeaker is described which is very lightweight and delivers 85 dB SPL across the 400-4000 cycle audio band, for use with radio sets ANPRC-77 and ANPRC-70 which provide the signal and power for the transducer. The diaphragm is made of 4 sheets of PVF2, a piezoelectric film with both sides coated with a thin aluminum film which was found to be very unstable in handling and flaking in humidity. The diaphragm presents a capacitive load to the amplifier requiring considerable power from the radio batteries, therefore, the loudspeaker is considered not suitable for man-pack battery operation. Author
- Electrical and Electronic Equipment