New Formulation of MNDIF Method for Eigenvalue Analysis of Acoustic Cavities

음향 공동의 고정밀도 고유치 해석을 위한 새로운 MNDIF 법 정식 개발

A new formulation of the MNDIF method is introduced to extract highly accurate eigenvalues of concave acoustic cavities with arbitrary shapes. It is said that the MNDIF method cannot yield accurate eigenvalues for concave cavities. To overcome this weak point, a new approach of dividing a concave cavity into two convex domains is proposed. The validity of the proposed method is shown through a case study.