A STUDY OF VARIOUS BARRIERS IN ENCLOSED SOUND FIELD BY USING THE COMPUTER PROGRAM—SOFIS
✍ Scribed by Z. XIANGYANG; C. KE'AN; S. JINCAI
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 143 KB
- Volume
- 253
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
In the study of the behaviors of barriers in an enclosed "eld, one should take into account such phenomena as sound energy re#ection, absorption, scattering and di!raction. Therefore, the study is much more di$cult than that in free "eld. In this paper, sound barriers are classi"ed into four kinds according to their size, number and shape. Each kind of barriers is modelled by a corresponding method based on a computer program*SOFIS. The program combines the ray-tracing technique and statistical method. The impulse response and some acoustical parameters such as sound pressure level at di!erent positions can be calculated by the program, no matter there are a certain kind of barriers in the "eld or the "eld is empty. The ray-tracing program and the algorithms for various barriers are validated by the comparison between measurement and prediction of the reverberation room and the anechoic room of the Northwestern Polytechnic University.