earticle

영어

Panel acoustic contribution analysis (PACA) is an advanced engineering tool for noise control and acoustic design in a cabin. In this study, a novel computational method for PACA by using Helmholtz equation least squares (HELS) based on nearfield acoustical holography (NAH) was proposed. According to the new very definition of panel acoustic contribution, formulations of the present method are derived to analyze the relative panel acoustic contributions of each panel in the interior sound field. The significance of this methodology is that it can provide either positive or negative contribution and rank relative acoustic contributions of individual panels to acoustic radiation anywhere in the field based on a single set of the acoustic pressures measured in the near field. A numerical simulation of a scaled vehicle cabin has been investigated to demonstrate the validity of this method. Moreover, the results show the advantage of the proposed method, since it could reflect the contributions of individual panels more correctly than the ranking of acoustic power.