This paper presents a direct boundary integral equation method for solving the exterior Neumann p... more This paper presents a direct boundary integral equation method for solving the exterior Neumann problem of the Helmholtz equation which is a mathematical formulation of the acoustic scattering problem at a perfectly hard body. It is proved that the integral equation obtained from the Helmholtz representation is equivalent to the original boundary value problem and it has a unique solution in a suitable Sobolev space in the framework of pseuo-differential operators. Moreover, the numerical treatment and error estimate are given by using a Galerkin approximation.
This paper presents a direct boundary integral equation method for solving the exterior Neumann p... more This paper presents a direct boundary integral equation method for solving the exterior Neumann problem of the Helmholtz equation which is a mathematical formulation of the acoustic scattering problem at a perfectly hard body. It is proved that the integral equation obtained from the Helmholtz representation is equivalent to the original boundary value problem and it has a unique solution in a suitable Sobolev space in the framework of pseuo-differential operators. Moreover, the numerical treatment and error estimate are given by using a Galerkin approximation.
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