A Review of Mid-Frequency Methods for Automotive Structure-Borne Noise

A number of methods have been proposed for predicting the vibro-acoustic response of an automobile in the mid-frequency range. This paper provides a review of a number of these methods and contrasts their strengths and weaknesses. In the past, the term ‘mid-frequency’ has sometimes been applied rather loosely to differing classes of problem. This paper provides a qualitative definition of the term ‘mid-frequency’ and identifies the physical behavior that is unique to ‘mid-frequency’ problems.