title: Noise control zone for a periodic ducted Helmholtz resonator system.
abstract: This paper presents a theoretical study of the dispersion characteristics of sound wave propagation in a periodic ducted Helmholtz resonator (HR) system. The predicted result fits well with a numerical simulation using a finite element method. This study indicates that for the same system, no matter how many HRs are connected or what the periodic distance is, the area under average transmission loss T L¯ curves is always the same. The broader the noise attenuation band, the lower the peak attenuation amplitude. A noise control zone compromising the attenuation bandwidth or peak amplitude is proposed for noise control optimization.
authors.affiliation: Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China chenzhi.cai@connect.polyu.hk, cheuk-ming.mak@polyu.edu.hk.
authors.forename: Chenzhi
authors.initials: C
authors.lastname: Cai
authors.affiliation: Department of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China chenzhi.cai@connect.polyu.hk, cheuk-ming.mak@polyu.edu.hk.
authors.forename: Cheuk Ming
authors.initials: CM
authors.lastname: Mak