Abstract
In order to improve airborne noise in mid frequency, this paper proposes an efficient and fast simulation method in consideration of panel vibration modal characteristic. Firstly, because the panel vibration mode can increase/decrease the sound radiation, a new index called “Equivalent radiation power with phase-cancellation” is proposed to consider the effect of the modal characteristic onto panel transmission loss. Then, transmission loss of acoustic trims is also remodeled with transmissibility of the trim. With those proposed in this paper, airborne transfer function at mid frequency is simplified. The accuracy/benefit are discussed along with comparison of conventional solution and test results.
