Accession Number:

AD0260511

Title:

SOUND SURVEY METER FOR FIELD TESTS OF FOG SIGNALS

Descriptive Note:

Corporate Author:

COAST GUARD WASHINGTON D C

Personal Author(s):

Report Date:

1961-07-25

Pagination or Media Count:

1.0

Abstract:

Tests of a small, comAug 61 OTS price 1.10 Coast Guard, Washington, D. C. SOUND SURVEY METER FOR FIELD TESTS OF FOG SIGNALS, by J. M. OConnell, 25 July 61. 9p. incl. illus. Proj. no. CGTD J15-51 Unclassified report DESCRIPTORS Recording devices, Design, Acoustic detectors, Measurement, Fog signals, Calibration, Effectiveness, Determination, Soun , Detection. Tests of a small, compact, self-contained sound measuring apparatus with a rated dynamic range of 50 to 146 decibels re 0.0002 microbar are reported. The instrument tested was a General Radio Type 1555-AS3 Sound Survey Meter with a ceramic microphone on an extension cable. Frequency response of the meter was investigated as a function of sound pressure level. Dynamic response at 1000 cps as a function of sound pressure level and temperat re dependence of 1000 cps are also reported. T HE REPORT CONCLUDES THE DEVICE CAN MEASURE THE OUTPUT OF MOST Coast Guard fog signals within or - 2 decibels. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE