Record Display for the EPA National Library Catalog
RECORD NUMBER: 45 OF 48Main Title | The design of a low cost sound level meter / | |||||||||||||||||||||||||||||||
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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 |
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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) |
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Notes | "EPA 550-9-74-008." "April 1974." Cover title. AD 783 808. |
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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) |