Issue |
EPL
Volume 146, Number 6, June 2024
|
|
---|---|---|
Article Number | 60003 | |
Number of page(s) | 6 | |
Section | General physics | |
DOI | https://doi.org/10.1209/0295-5075/ad56c4 | |
Published online | 09 July 2024 |
Broadband characteristics and bandpass acoustic focusing via movable second-order Helmholtz resonator
1 Anhui Jianzhu University - Hefei, Anhui 230601, China
2 Key Laboratory of Architectural Acoustic Environment of Anhui Higher Education Institutes Hefei, Anhui 230601, China
Received: 13 April 2024
Accepted: 11 June 2024
In this paper, a method is theoretically proposed to obtain a novel movable second-order Helmholtz resonator by adding a perforated plate inside the cavity of the Helmholtz resonator that can be freely tuned up and down. Through software simulation, it is concluded that the resonator meets the design objective of saving production costs so that when the manufactured physical object is required to change the structural parameters, it only needs to be dynamically adjusted on this basis, rather than to reproduce a new physical object with new structural parameters. Meanwhile, it has excellent acoustic characteristics, with a stop band in the range of 80–610 Hz at the low frequency and a bandpass acoustic focusing characteristic in the range of 4050–5250 Hz. It can achieve directional adjustable focus acoustic focusing for plane waves incident at any angle, and directional adjustable focus acoustic focusing for cylindrical wave incidence, with excellent focusing effect. The added perforated plate changes the resonator one-item structure model and can be reused to meet different structural parameters.
© 2024 EPLA
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