title: An electronically tunable duct silencer using dielectric elastomer actuators.
abstract: A duct silencer with tunable acoustic characteristics is presented in this paper. Dielectric elastomer, a smart material with lightweight, high elastic energy density and large deformation under high direct current/alternating current voltages, was used to fabricate this duct silencer. The acoustic performances and tunable mechanisms of this duct silencer were experimentally investigated. It was found that all the resonance peaks of this duct silencer could be adjusted using external control signals without any additional mechanical part. The physics of the tunable mechanism is further discussed based on the electro-mechanical interactions using finite element analysis. The present promising results also provide insight into the appropriateness of the duct silencer for possible use as next generation acoustic treatment device to replace the traditional acoustic treatment.
authors.affiliation: Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, #09-02, Singapore 117411, Singapore.
authors.forename: Zhenbo
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore.
authors.forename: Hareesh
authors.initials: H
authors.lastname: Godaba
authors.affiliation: Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, #09-02, Singapore 117411, Singapore.
authors.forename: Yongdong
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Institute of High Performance Computing, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore tslluz@nus.edu.sg, hareesh@u.nus.edu, tslcyd@nus.edu.sg, keithfoo@gmail.com, tslmd@nus.edu.sg, mpezhuj@nus.edu.sg.
authors.forename: Choon Chiang
authors.initials: CC
authors.lastname: Foo
authors.affiliation: Temasek Laboratories, National University of Singapore, 5A Engineering Drive 1, #09-02, Singapore 117411, Singapore.
authors.forename: Marco
authors.initials: M
authors.lastname: Debiasi
authors.affiliation: Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore.
authors.forename: Jian
authors.initials: J
authors.lastname: Zhu
mesh_terms: D065966:Absorption, Physicochemical; D000162:Acoustics / Q000295:instrumentation*; D000389:Air Conditioning / Q000009:adverse effects / Q000295:instrumentation*; D004548:Elasticity; D020724:Elastomers; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D009622:Noise / Q000517:prevention & control*; D013499:Surface Properties; D014732:Vibration
chemical_list: D020724:Elastomers