Accession Number : AD0783808

Title :   The Design of a Low Cost Sound Level Meter.

Descriptive Note : Final rept. 1 Jan 72-1 Jul 74,

Corporate Author : AIR FORCE ACADEMY COLO

Personal Author(s) : Griffiths,John D.

Report Date : APR 1974

Pagination or Media Count : 44

Abstract : Conventional sound level meters generally use precision ceramic microphones and discrete solid state circuitry. This report describes a design using an electret microphone and integrated circuit operational amplifiers. The advantages of this design are low cost, ease of manufacture, stable gain, and low power consumption. Construction details are included to permit local manufacture. The complete instrument is capable of meeting the Type 2, General Purpose Sound Level Meter, requirements of ANSI S1.4-1971, American National Standard Specification for Sound Level Meters. (Author)

Descriptors :   *Measuring instruments, Sound, Noise, Acoustic measurement

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE