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Author
Flynn, D. R. | Yaniv, S. L.
Title
Highway Noise Criteria Study: Relations Among Frequency Rating Procedures. Final Report.
Coporate
National Bureau of Standards, Washington, DC
Sponsor
Federal Highway Administration, Washington, DC
Report
NBS TN 1113-3, February 1983,
Distribution
Available from National Technical Information Service
Keywords
highways; noise pollution; acoustic measurement; transportation noise; site surveys; regression analysis
Identifiers
noise levels
Abstract
A series of calculations was performed to ascertain how well one frequency-weighted rating, such as weighted sound level, loudness level, or perceived noise level, may be predicted from another such rating. A total of 103 average sound level spectra, measured at several distances from different types of highways, were used in these calculations. It was found that knowing a single noise rating, such as the A-weighted sound level, enables one to predict other outdoor ratings in this set of 103 spectra with a standard deviation of the order of 1 to 2 dB. If, in addition, traffic speed and mix and the distance to the highway are taken into account, these standard deviations can be reduced to 0.5 to 1 dB, depending upon the particular noise rating of interest. Equations are given for predicting one rating from another; the associated standard deviations are presented as a measure of how well any given rating can be predicted from a single measured, or otherwise known, noise rating.