Ses Yutucu ve Yansıtıcı Yüzey Tasarımı

Abstract

This thesis study focuses on the multi-layered design of various surfaces that can reflect and absorb sound, including different material types. Solid, liquid and porous material types are used in the designs, and the effects of the order of these materials in the layered structure on the surface behavior are investigated. Taken consideration that created surfaces are thin. The Transfer Matrix Method (TMM), which is suitable for the analysis of multilayer structures, is used as a method, and each layer and the interfaces of the layers are modeled with a matrix. In the case of using porous materials in the designs, the Biot Theory has also been used. The absorption coefficient for the absorbent properties and the reflection coefficient for the reflective properties of the designed surfaces are examined. Thue-Morse, Baum-Sweet and Dragon sequences, which have not been included in the literature on this subject yet, are used to determine the order of materials used in multi-layered structures, and also periodic material sequences are included. MATLAB program is used in the analysis. The sound absorption and reflection properties of the different layered structures obtained are discussed, and the structures that provided the best performance are suggested for current applications in the literature.