ArticleScientific reports2025
Analysis of the defect mode features in an asymmetric and symmetric acoustic system using expansion chambers.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed.
- Impact of defects and asymmetry on the acoustic transmission of serial resonators.Scientific reports · 2026Article
- Harnessing fano-like line shape resonance in a rectangular waveguide for filtering applications.Scientific reports · 2026Article
- Novel Helmholtz resonators parallel to lateral closed resonators for sensing applications.Scientific reports · 2025Article
- Tunable sensing properties of a Helmholtz resonator array featuring a central defect cell with four lateral ducts.Scientific reports · 2025Article
- Design of a parallel Helmholtz resonator structure as a hazardous greenhouse gases sensor using the transfer matrix method.Scientific reports · 2025Article
- Acoustic metasurface constructed by periodic parallel Helmholtz resonators for gas sensing applications.Scientific reports · 2025Article
- Performance analysis of Thue Morse acoustic resonators for noise reduction.Scientific reports · 2025Article
- Tunability of acoustic band gaps using Thue Morse quasiperiodic lateral resonators.Scientific reports · 2025Article
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4 authors.
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Abstract
In this paper, the transfer matrix method is used to study the dispersion of acoustic waves in a finite periodic expansion chambers system with a defect. Two kinds of structures are studied. The first one is formed by expansion chambers, which are symmetrical concerning a defect, and the second one is asymmetrical with a defect. Studying the properties of consistent peak (defective mode) at normal incidence is the objective of these calculations. Consistent peaks arise in the forbidden frequency intervals when a fault in the perfectly periodic structure is present. Concerning the defected asymmetrical configuration, there is a consistent peak located inside acoustic band gap. On the other hand, in the symmetrical structure, two consistent peaks appear in the band gap. In the asymmetrical structure, the consistent peak height depends on the variance in the cross-section of the defect guide. Moreover, the impact of the defect guide's length on the number of consistent peaks that appear in the band gap will be examined. These results can be used in several applications, such as the design of new kinds of acoustic filters.
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