A sound absorption panel containing coiled Helmholtz resonators

Jung San Chen, Yu Bin Chen, Yu Hsiang Cheng, Li Chih Chou

Research output: Contribution to journalArticlepeer-review

Abstract

This study proposes a promising design of sound absorption panels containing acoustic resonators. Each resonator is comprised of one small-sized and one large-sized tubes in series. The former can be viewed as the neck of a Helmholtz resonator, while the latter serves as a resonant chamber. Both tubes are bent up to fit in limited space of the panel. The 3D printing technology is exploited to fabricate samples for measurements. Frequency manipulation for the absorption peak can be achieved by adjusting the geometric parameters of tubes. Moreover, two pairs of resonators with different dimensions can broaden the bandwidth of absorption. Theoretical predictions on absorption characteristics agree well with numerical and experimental results. The proposed structure offers a feasible way of absorbing low-frequency sound without the need to use thick panels.

Original languageEnglish
Article number126887
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume384
Issue number35
DOIs
Publication statusPublished - 2020 Dec 17

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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