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Computer-Aided Room Acoustical Design

During the last 15 years, the computer methods of calculations had appeared in different fields of acoustics. The impossibility of analytical solution of the wave equations for the real rooms had become a reason for searching for different numerical approaches of the complicated wave phenomena. Two main methods has been established, both based on the geometrical treating of the sound propagations: ray tracing and image source method. This work represents an optimized recursive algorithm, realizing the image source method (ISM) for any room shape, using the personal computer. The result is a package of programs for the IBM PC-AT, that allows the acoustical designed to receive full information about all the important acoustical parameters: Reverberation time, the distribution of sound pressure level, the structure of the sound field at any distinct listener's location, and from it the echograms, clarity, definition, speech intelligibility, and lateral efficiency.

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