In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 25, No. 4_Supplement ( 1953-07-01), p. 825-825
Abstract:
A condenser type of transducer is described featuring a nonstretched, large area diaphragm designed to vibrate in phase over its entire surface. The operating elements consist of an aluminum foil front electrode cemented to a 332-inch foam rubber sheet mounted on an aluminum back plate. The whole assembly is fitted in a picture frame 18 inches square and protected with a perforated metal face plate. As a microphone the open circuit sensitivity is about −57 dbv (re 1 dyne/cm2), and the frequency response is flat within ±3 db from 200 to 5000 cycles. Directional characteristics taken with the microphone, using a distant source, show a close agreement with the values calculated for a flat surface with all elements moving in phase. It appears suitable for applications where the talker remains at a distance from the microphone and where an ordinary nondirectional transducer would introduce serious room reverberations.
Type of Medium:
Online Resource
ISSN:
0001-4966
,
1520-8524
Language:
English
Publisher:
Acoustical Society of America (ASA)
Publication Date:
1953
detail.hit.zdb_id:
1461063-2
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