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Kiminobu NISHIMURA Mitsuo OHTA Teruyuki FUKUDA
A trial of statistical evaluation based on the probability distribution function is theoretically proposed in the actual case when a non-Gaussian type sound noise exhibits nonstationary properties due to a temporal change of statistical parameters. Next, when a nonstationary sound pressure wave of non-Gaussian type passes through a sound insulation system, the probability distribution of transmitted noise intensity is theoretically derived by reflecting the nonstationary properties of incident noise and the frequency characteristics (or impulse response) of the noise insulation system. The proposed evaluation method is employed for an aluminum single-wall whith nonstationary Gaussian type incident noise and compared with experimentally observed values. All results show good agreement with experimental results.