Design of Acoustic Metamaterial to Control Reflection Sound by Topology Optimization

Abstract

The main topic of this study is a shape design of a noise eliminating duct with an acoustic metamaterial using topology optimization. Topology optimization attracts attention as a useful technique because of its flexibility in the design and applied to the various fields. Focusing on the acoustic field, there are some studies on the optimization design for noise cancellation device of radiated noise from a pipe used by topology optimization. This paper presents a noise eliminating duct with an acoustic metamaterial using topology optimization based on normalized Gaussian network and genetic algorithm. The optimized shape of an acoustic metamaterial device presented sound wave deflection by controlling reflection wave at specific frequency.