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The process of developing a vehicle for optimal interior noise levels is an enormous effort on the part of a large team of individuals. Since any given vehicle program will continually evolve during the development process, an effective and robust noise control strategy and process must be implemented to ensure that vehicle performance targets are realized in production. However, robust does not mean “performance overkill” to provide for all possible contingencies, since this approach would be prohibitively expensive and massive. This paper outlines a process by which vehicle development allows for managing performance tradeoffs with other packaging and performance concerns, while continually monitoring performance, cost and mass to target.

A rectangular thin-walled box is used as a test problem for comparing the results obtained from finite element analysis (FEA), boundary element analysis (BEA), statistical energy analysis (SEA), and experimental measurement. The box structure is mechanically excited by a random point force generated by a vibration exciter. The structural acoustic coupling has been taken into account because there is a significant acoustical pressure load acting on structural surfaces of the box. Both structural and acoustic responses are investigated and good agreement is observed between the numerical and experimental results.