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http://hdl.handle.net/10397/96073
Title: | Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube | Authors: | Wang, ZB Chiang, YK Choy, YS Wang, CQ Xi, Q |
Issue Date: | May-2019 | Source: | Applied acoustics, May 2019, v. 148, p. 202-211 | Abstract: | This study presents a passive noise control approach for directly suppressing sound radiation from an axial-flow fan, which involves micro-perforated panels (MPPs) backed by cavities and integrated with a hollow tube with the characteristics of a Herschel–Quincke (HQ) tube (MPPHQ housing). Noise suppression is mainly achieved by sound cancellation between the sound fields from the fan with a dipole nature and sound radiation from a vibrating panel via vibro-acoustic coupling. In addition, noise mitigation is supplemented by sound absorption in micro-perforations and acoustic interference at the hollow tube boundaries. A two-dimensional theoretical model is established to investigate the HQ segment housing a sound source. Results show that the HQ segment enhances the sound suppression performance in the passband region of the MPP housing device, and thus, a widened effective working band is obtained. Optimization is conducted to identify the optimal parameters for the MPPHQ housing. The proposed method has the potential to effectively control ducted-fan noise and to enhance the quality of products with a ducted-fan system. | Publisher: | Pergamon Press | Journal: | Applied acoustics | ISSN: | 0003-682X | EISSN: | 1872-910X | DOI: | 10.1016/j.apacoust.2018.12.016 | Rights: | © 2018 Elsevier Ltd. All rights reserved. © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/ The following publication Wang, Z. B., Chiang, Y. K., Choy, Y. S., Wang, C. Q., & Xi, Q. (2019). Noise control for a dipole sound source using micro-perforated panel housing integrated with a Herschel–Quincke tube. Applied Acoustics, 148, 202-211 is available at https://doi.org/10.1016/j.apacoust.2018.12.016. |
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