Record Display for the EPA National Library Catalog

RECORD NUMBER: 11 OF 11

Main Title The design of a low cost sound level meter /
Author Griffiths, John D.
CORP Author Air Force Academy Colo;Environmental Protection Agency, Washington, D.C. Office of Noise Abatement and Control.
Publisher Dean of the Faculty, United States Air Force Academy ; Available from National Technical Information Service,
Year Published 1974
Report Number USAFA-TR-74-6; EPA-550/9-74-008; AD783808
Stock Number AD-783 808/9
OCLC Number 04949437
Subjects Noise--Measurement
Additional Subjects Measuring instruments ; Sound ; Noise ; Acoustic measurement ; Sound level meters
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101Y4KO.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD  EPA 550-9-74-008 Headquarters Library/Washington,DC 01/30/2020
ELBD F AD 783 808 AWBERC Library/Cincinnati,OH 12/18/1998
ELBD ARCHIVE EPA 550-9-74-008 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ESAD  EPA 550-9-74-008 Region 10 Library/Seattle,WA 03/23/2010
NTIS  AD-783 808/9 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 42 pages : illustrations ; 27 cm
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)
Notes
"EPA 550-9-74-008." "April 1974." Cover title. AD 783 808.
Contents Notes
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)