Transmitted power assessment from reverberant cavity set-up measurements

This paper presents a novel method for the assessment of power radiated by a (treated) test panel. Conventional measurement techniques for panel radiation typically use either a diffuse field or a free-field as receiving environment. However, such an environment is not trivial to create, especially in a compact set-up. Therefore, a method is proposed to retrieve radiated power from a set of pressure measurements that can be applied in a small, reverberant receiving cavity. A base of modal shapes is used to describe the radiating panel velocity, complemented with a direct acoustic simulation of the receiving cavity. In this model, panel shape contribution factors are estimated from the pressure measurements. Finally, radiated power can be calculated from this model. For validation purpose, a bare plate case is considered, showing a good agreement between the original and reconstructed radiated power.