关键词: 声学, 辐射声粗糙度, 结构声耦合场, 声品质, 封闭空腔, 调制音

Abstract: Based on the finite element model of acousticstructure coupling field in a sealed cavity and the improved Senthares nonharmonic psychoacoustics model, the sound pressure level of the internal radiating sound due to the excitation of the harmonic force exerted on the shell of the cavity is calculated. The acousticstructure coupling effect is considered. The sound roughness caused by the rapid modulation at the evaluation point is analyzed. Moreover, the effects of the sound pressure level of the modulated sound, the frequency of the modulated sound and the stiffness of the shell on the radiating sound roughness are studied. This work provides the data and method for determination of the internal radiating sound roughness in the cavity caused by the rapid modulation of the other sound sources.

Key words: acoustics, radiating sound roughness, acousticstructure coupling field, sound quality, finite element method (FEM), sealed cavity, modulated sound