title: An integral equation method for calculating sound field diffracted by a rigid barrier on an impedance ground.
abstract: This paper proposes a different method for calculating a sound field diffracted by a rigid barrier based on the integral equation method, where a virtual boundary is assumed above the rigid barrier to divide the whole space into two subspaces. Based on the Kirchhoff-Helmholtz equation, the sound field in each subspace is determined with the source inside and the boundary conditions on the surface, and then the diffracted sound field is obtained by using the continuation conditions on the virtual boundary. Simulations are carried out to verify the feasibility of the proposed method. Compared to the MacDonald method and other existing methods, the proposed method is a rigorous solution for whole space and is also much easier to understand.
authors.affiliation: Key Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, No. 22 Hankou Road Gulou District, Nanjing 210093, China.
authors.forename: Sipei
authors.initials: S
authors.lastname: Zhao
authors.affiliation: Key Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, No. 22 Hankou Road Gulou District, Nanjing 210093, China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Qiu
authors.affiliation: Key Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, No. 22 Hankou Road Gulou District, Nanjing 210093, China.
authors.forename: Jianchun
authors.initials: J
authors.lastname: Cheng