Prediction of acoustic fields at mid-high frequency using an energy density model

An acoustic energy density model is proposed to predict acoustic fields at mid-high frequency. The derived equation comprises descriptions of direct field and reverberant field, taking account of diffusive reflection model. It allows the derivation of the sound field analysis in small scales. A simple acoustic enclosure as an example is investigated by FEM and the acoustic energy density method respectively. The comparative results show that the prediction of acoustic energy density method is accurate and reliable.