Abstract
In this paper a new evaluation for fluctuating aerodynamic noise under on-road turbulent flow conditions is proposed. Degree of modulation is used to evaluate the feeling of fluctuation. Furthermore, degree of modulation is applied to the evaluation index for fluctuating aerodynamic noise as Nm index. Nm index is a synthesis of Loudness (N) for the noise level and slope of degree of modulation (m) for the feeling of fluctuation. It is shown Nm index value agrees with human feeling scores relative to conventional index values.
