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ASA S12.8-1998 (R2024)

Methods for Determining the Insertion Loss of Outdoor Noise Barriers
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ASA S12.8-1998 (R2024)

Methods for Determining the Insertion Loss of Outdoor Noise Barriers

PUBLISH DATE 1998
ASA S12.8-1998 (R2024)
This standard presents three methods for determining the insertion loss of outdoor noise barriers. The methods are "direct" BEFORE and AFTER measurements; "indirect" BEFORE measurements at an "equivalent" site; and "indirect" predictions of BEFORE sound levels. "Indirect BEFORE measurements" and "indirect BEFORE prediction" methods require direct measurements of AFTER sound levels. Measurements of acoustical descriptors use sound sources naturally present at a site, controlled natural sound sources, or controlled artificial sound sources. Within prescribed limits, the receiver location and atmospheric, ground, and terrain conditions may be chosen based on the objectives for determination of barrier insertion loss. Examples are provided for worksheets that may be used for data acquisition and analysis.
SDO ASA: Acoustical Society of America
Document Number S12.8
Publication Date April 27, 1998
Language en - English
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