Results 1 to 10 of about 136 (74)

FEM Investigation of a Multi-Neck Helmholtz Resonator

Applied Sciences, 2023
An increasingly significant area of research with several applications in numerous disciplines is that of multi-neck Helmholtz resonators. This research is set to explore the accuracy and applicability of the finite element method (FEM) for the ...
Nikolaos M. Papadakis, Georgios E. Stavroulakis   +1 more
doaj   +4 more sources

Tunable Helmholtz Resonators Using Multiple Necks [PDF]

Micromachines, 2023
One of the uses of Helmholtz resonators is as sound absorbers for room acoustic applications, especially for the low frequency range. Their efficiency is centered around their resonance frequency which mainly depends on elements of their geometry such as
Nikolaos M. Papadakis, Georgios E. Stavroulakis   +1 more
doaj   +4 more sources

Leakage Effect on the Transmission Properties of a Duct Loaded with a Helmholtz Resonator

Applied Sciences, 2022
The characteristics of transmitted acoustic field have important significance to the leakage detection and the acoustic metasurface technology. When the additional leak holes are present, the conventional single neck Helmholtz resonator will naturally ...
Yang Ou, Yonghui Zhao
doaj   +1 more source

Analytical modelling of the acoustic behaviour of multi-neck Helmholtz resonators using the parallel transfer matrix method

Acta Mechanica
Abstract Since multi-neck Helmholtz resonators (HRs) have attracted considerable research interest in recent years in the context of leakage, and both extended tunability and broader frequency response can be achieved through the targeted use of such resonators, the development of a precise analytical model for predicting the acoustic
Philipp M. Heck, Nikolaos M. Papadakis, Georgios E. Stavroulakis, Sabine C. Langer   +3 more
openaire   +1 more source

Modeling and Investigation of a Multi-Resonant Metamaterial Sound Insulator

Archives of Acoustics
A design of a multi-resonant acoustic metamaterial sound insulator is proposed to attenuate multi-tonal and broadband noise. The unit cell of the metamaterial consists of a porous material with four, nine, and sixteen embedded Helmholtz resonators and ...
Zacharie Laly, Raymond Panneton, Noureddine Atalla, Sebastian Ghinet   +3 more
doaj   +1 more source

Composite acoustic metamaterial for low-frequency sound insulation based on multi-cell coupling

Journal of Low Frequency Noise, Vibration and Active Control
The broadband suppression of low-frequency noise in ship constitutes a critical engineering challenge, as it is directly related to acoustic stealth, vibration and noise control and equipment safety in marine vessels.
Xiaohan Han, Hongyu Cui, Xiaokai Yin, Haoming Hu, Huanqiu Xu   +4 more
doaj   +1 more source

Recent Progress in Resonant Acoustic Metasurfaces. [PDF]

Materials (Basel), 2023
Liu D, Hao L, Zhu W, Yang X, Yan X, Guan C, Xie Y, Pang S, Chen Z.   +8 more
europepmc   +1 more source

Design and Validation of a PU-Six-Cavity Helmholtz Metamaterial Composite Acoustic Package for Broadband Noise Reduction in Commercial Vehicle Cabs. [PDF]

Materials (Basel)
Cai C, Duan Y, Wang T, Wang A, Wang X, Shi Y, Xiao X, Huang Y.   +7 more
europepmc   +1 more source

Design and Sound Absorption Characteristics of a Broadband Acoustic Absorber for Transformer Noise Control Based on a Composite Structure of Traditional and Side-Slit Helmholtz Resonators. [PDF]

Materials (Basel)
Zhao L, Yang G.
europepmc   +1 more source

Asymptotics of the meta-atom: plane wave scattering by a single Helmholtz resonator. [PDF]

Philos Trans A Math Phys Eng Sci, 2022
Smith MJA, Cotterill PA, Nigro D, Parnell WJ, Abrahams ID.   +4 more
europepmc   +1 more source