Noise reduction by viscothermal acousto-elastic interaction in double wall panels

摘要

The present study focuses on the feasibility of noise reduction with double wall panels. The emphasis is put upon the application of the dissipative properties of a thin air layer between two flexible plates. Vibration energy is converted into heat by the viscosity and thermal conductivity of the air between the plates. The goal of this study is to develop and to validate efficient models including viscothermal wave propagation for double wall panels which make it possible to investigate the noise reduction for both airborne and structure borne noise at low frequencies.