Abstract
A method to compose the expression of the transfer function of multi-layer wall is presented. The method depends on newly constituted matrices, containing Hadamard matrix, and the procedure to decide the expression of the function is as follows. i) Constituting matrices : Matrices are constituted by simple rules presented in this paper. ii) Forming the transfer function : The expression of the function is decided by means of matrix-products. In accordance with the above procedure, we can decide the expression of the function not only by hand calculation but also by using computer.
