Abstract
A method for predicting ESL (effective sound level)—the sound level of steady noise which is considered to be as annoying as fluctuating noise—has been developed. The method is based on a kind of integration of ψ, where ψ is the perceived magnitude of the sound and proportional to the sound pressure to the power 2α. By applying this method, the ESL of a fluctuating noise is calculated from the probability density function of the level of the noise. ESLs of 118 fluctuating noises with various forms of the level distribution were measured by means of the method of magnitude estimation. Good agreement was found between the calculated and observed ESLs of the noises except for those whose sound level continuously increased during the sound duration.
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