A mew estimation method of noise evaluation index, L_<eq>, by use of the statistical information on the arbitrary type noise level fluctuation

概要

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In this report, the equivalent expression for the mean value of arbitrary non-linear type state variable with respect to the arbitrary non-Gaussian random phenomena is first derived theoretically by using the expectation operation based on only the standard Guassian distribution function. Next, base on this convenient expression, an estimation method of the noise evaluation index, L_<eq>, is newly derived in a hierarchial form containing the well-known usual estimation method derived under the assumption of the standard Gassian distribution as the first expansion term. That is, this method is generally applicable to any kind of random phenomena by grasping the statistical information on the noise level fluctuation. Finally, the validity of the proposed method is experimentally confirmed too by applying it to the actual road traffic noise data.
社団法人日本音響学会の論文