Accession Number : ADA189296

Title :   An Investigation of the Cyclic Nature of the Ambient Noise within Lake Pend Oreille.

Descriptive Note : Final rept. Jan-Dec 86,

Corporate Author : DAVID TAYLOR RESEARCH CENTER BETHESDA MD

Personal Author(s) : Cummings II, Jonathan

PDF Url : ADA189296

Report Date : Dec 1987

Pagination or Media Count : 64

Abstract : Lake Pend Oreille ambient noise measurements were acquired during 1986 in support of Noise samples obtained 9 times a day were averaged over hourly, weekly, and monthly periods. Noise trends were summarized. Variations in noise level with times of day and season of the year correlate well with trends in weather patterns and recreational boating use. Daily averaged data clearly show the contribution of recreational boating to lake noise - as much as 10-15 dB average level increase for midday as compared to night. Weekly averages for weekend days are modestly higher (up to 50 dB) than mid-week days, again due to increased weekend use of the lake by recreational boating. Average seasonal trends are generally higher (up to 10 dB) during the summer months than in the winter months.

Descriptors :   *AMBIENT NOISE, *UNDERWATER SOUND, LAKES, LEVEL(QUANTITY), ACOUSTIC MEASUREMENT, NIGHT, PATTERNS, SAMPLING, SEASONAL VARIATIONS, SUMMER, WEATHER, WINTER, DIURNAL VARIATIONS, IDAHO

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE