Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
Analytical design and multi-parameter optimization of micro-perforated double-panel partitions for normal-incidence broadband sound transmission loss. |
| Συγγραφείς: |
Ali, Tahir Muhammad, Nijalingappa, Yogeesh, Vasudevan, Asokan, Jain, Rajashree, William, P. |
| Πηγή: |
Sound & Vibration; 2026, Vol. 60 Issue 5, p1-17, 17p |
| Θεματικοί όροι: |
Transfer matrix, Soundproofing, Helmholtz resonators, Partitions (Building), Acoustic resonators, Acoustical engineering |
| Περίληψη: |
An analytical and computation-based framework is presented for designing a micro-perforated double-panel partition with improved broadband sound transmission loss. The study combines closed-form expressions, transfer matrices, dimensionless design parameters and tabulated numerical values to support practical acoustic design. In the present work, a thin micro-perforated panel is asymmetrically inserted into the cavity spanning between two parallel panels that are separated by an air cavity forming coupled resonant mechanisms. This normal-incidence transfer-matrix model is composed of panel impedances, cavity propagation matrices and Maa-type micro-perforate impedance formulas. A local Helmholtz-type estimate of transmission loss and the mass-air-mass resonance are stated explicitly, followed by a simultaneous optimization of hole diameter, perforation ratio, micro-perforated sheet thickness and cavity split over a target frequency band. Over the 100–2,000 Hz band, the optimized asymmetric micro-perforated design improves the weighted average transmission loss by 6.49 dB and the arithmetic band-average transmission loss by 9.33 dB relative to the baseline double panel, with the strongest gains occurring in the upper octave bands. Parameter sweeps show that smaller perforations and slightly asymmetric cavity splits yield the best broadband trade-off for this case. Because the optimum occurs at the stated lower manufacturing bounds, it is interpreted as a constrained design result. Diffuse-field incidence, elastic plate dynamics, manufacturing tolerances, and experimental validation remain for future work. [ABSTRACT FROM AUTHOR] |
|
Copyright of Sound & Vibration is the property of Academic Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Βάση Δεδομένων: |
Complementary Index |