engleski

Applied virtual sources method

This paper describes the use of Virtual Sources Method (VSM) for simulation of indoor acoustics. The VS method of simulation is based on mirror image modeling, and it is scalable and suitable for implementation in any programming language. The method is able to provide very precise simulations by choosing an arbitrary number of points in which the calculations of sound pressure will be made. It is also possible to choose the number of reflections as well as the precision of the frequency characteristics of the absorption factor and the sound source itself. However, if the precision is set to high, the time required to complete the simulation rises, making it the biggest problem this simulation method has to face. The convenience of this method is further improved by showing all the results in an easy-to-understand graphic form. This simulation method has been applied to solve a real problem of choosing the right acoustic treatment for a puppet theatre. The theatre itself is a shoe-box type space with raised audience area. Before the implementation of acoustic treatment, the theatre had serious problems with flutter-echo, the reverberation time which was too long, sound focusing, low intimacy etc. The proposed acoustical treatment included the ceiling and the walls of the theatre. Before starting any actual work, the simulation was used to determine the desired acoustical parameters and to choose the right way of acoustic treatment. The graphic results of simulation showed that the proposed treatment of walls and ceiling was well chosen because the fore mentioned problems were solved by implementing it and that the actual acoustical treatment could be carried out.

Simulation; virtual sources method; arhitectural acoustics

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