Hybrid tool for quickly estimating the radiated acoustic power from a vibrating structure in a multiple-source environment

This paper presents a new hybrid method for predicting overestimating and u nderestimating indicators of the acoustic power radiated by a vibrating sur face even in the presence of other surrounding acoustic sources. This metho d is applicable to plates or low curvature surfaces radiating in open acous tic fields. The method is hybrid in the sense that the vibration field is m easured and the parietal pressure field is predicted considering two extrem e academic cases "baffled" and ''unbaffled." Many simplifications are made and justified in order to save running time. The method is successfully val idated in comparison with experimental results on both laboratory and real life structures. This method has led to a quick tool, allowing one to obtai n a good approximation of the radiated power in a few minutes. It provides a natural extension of a classical analyzer for vibroacoustics engineering. (C) 2000 Acoustical Society of America. [S0001-4966(00)04901-8].