title: Acoustic performance of a duct loaded with identical resonators.
abstract: This paper presents a theoretical study of a duct loaded with identical side-branch resonators. The Bloch wave theory and the transfer matrix method are used to investigate wave propagation in the duct. It is found that this duct-resonator system has a unique attenuation characteristic brought about by structural periodicity. Three types of stop-bands are discussed and their bandwidths are predicted. All of the results predicted by the theory fit well with a computer simulation using a three-dimensional finite element method. Compared to a single resonator, this structure may have a potential application in broadband noise control.
authors.affiliation: Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China. 09900436r@polyu.edu.hk
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: C M
authors.initials: CM
authors.lastname: Mak