Daily Question 2015.9.9 (EIA Discussion): 3 Wealth points for replies, plus 5 Wealth points for correct answers (single-choice question)
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If the maximum geometric dimension of a sound source is 2 meters, then the minimum distance in different directions at which the geometric divergence attenuation formula for point sources can be applied is ( ). A. 2m B. 3m C. 5m D. 7m The correct answer is C. Explanation: In sound environmental impact assessment, it is somewhat difficult to determine whether a source is a point source using the aforementioned definitions and theories. A simple approximation is that for a single sound source, if the distance from the center of the sound source to the prediction point exceeds 2 times the maximum geometric size of the sound source, it can be approximated as a point sound source.
If the maximum geometric dimension of a sound source is 2 meters, then the minimum distance in different directions that satisfies the requirements of the geometric decay formula for point sources is ( ) c
C. 5m.................................
If the maximum geometric dimension of a sound source is 2 meters, then the minimum distance in different directions that satisfies the requirements of the geometric decay formula for point sources is C
If the maximum geometric dimension of a sound source is 2 meters, then the minimum distance in different directions that satisfies the requirements of the geometric decay formula for point sources is (C. 5m)
C. 5m !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!