Abstract
REAL is the world-wide common method used for the hearing protector attenuation measurement in accordance with ISO 4869 and ANSI S12.6. This method is not suitable to determine the attenuation of the peak level of impulsive noise, because it measures the attenuation subjectively at low levels of a steady-state sound near the threshold of hearing. Alternative low cost and quick methods are required for assessing hearing protector attenuation for impulsive noise. In this paper a numerical model based on the finite-element method (FEM) for the impulsive noise attenuation prediction of the hearing protector is presented. The insertion loss of the peak level in the time domain is calculated and compared with laboratory measurements.
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