Analysis of sound absorption performance of acoustic absorbers made of fibrous materials

• Autorzy: Meissner Mirosław , Zieliński Tomasz G.

Identyfikatory

DOI

10.21008/j.0860-6897.2022.2.05

• Języki publikacji: EN

Abstrakty

EN

Absorbing properties of multi-layer acoustic absorbers were modeled using the impedance translation theorem and the Garai and Pompoli empirical model, which enables a determination of the characteristic impedance and propagation constant of fibrous sound-absorbing materials. The theoretical model was applied to the computational study of performance of single-layer acoustic absorber backed by a hard wall and the absorber consisting of one layer of absorbing material and an air gap between the rear of the material and a hard back wall. Simulation results have shown that a high thickness of absorbing material may cause wavy changes in the frequency relationship of the normal and random incidence absorption coefficients. It was also found that this effect is particularly noticeable for acoustic absorbers with a large thickness of air gap between the absorbing material and a hard back wall.

Słowa kluczowe

EN

sound absorption; multi-layer absorber; surface impedance; fibrous materials; air gap

PL

chłonność akustyczna; wielowarstwowy pochłaniacz dźwięku; materiały włókniste; szczelina powietrzna

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2022
• Tom: Vol. 33, nr 2
• Strony: art. no. 2022205
• Opis fizyczny: Bibliogr. 8 poz., 1 il. kolor., wykr.

Twórcy

autor

Meissner Mirosław

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw

• https://orcid.org/0000-0003-3885-0273

autor

Zieliński Tomasz G.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw

• https://orcid.org/0000-0002-2550-1667

Bibliografia

• 1. M. Meissner; Acoustics of small rectangular rooms: Analytical and numerical determination of reverberation parameters; Appl. Acoust. 2017, 120, 111-119. DOI: 10.1016/j.apacoust.2017.01.020
• 2. M. Meissner, T.G. Zieliński; Low-frequency prediction of steady-state room response for different configurations of designed absorbing materials on room walls; Proceedings of 29th International Conference on Noise and Vibration Engineering (ISMA 2020) and 8th International Conference on Uncertainty in Structural Dynamics (USD2020), Leuven, Belgium, September 7-9, 2020, 463-477.
• 3. M. Meissner; Application of high-density sound absorbing materials for improving low-frequency spectral flatness in room response; Vibrations in Physical Systems 2021, 32(1), 2021111. DOI: 10.21008/j.0860-6897.2021.1.11
• 4. T.G. Zieliński; Microstructure representations for sound absorbing fibrous media: 3D and 2D multiscale modelling and experiments; J. Sound Vib. 2017, 409, 112-130. DOI: 10.1016/j.jsv.2017.07.047
• 5. M. Garai, F. Pompoli; A simple empirical model of polyester fibre materials for acoustical applications; Appl. Acoust. 2005, 66(12), 1383-1398. DOI: 10.1016/j.apacoust.2005.04.008
• 6. J. Allard, N. Atalla; Propagation of Sound in Porous Media: Modelling Sound Absorbing Materials, 2nd ed.; John Wiley & Sons, Ltd.: West Sussex, United Kingdom, 2009.
• 7. H. Kuttruff; Room Acoustics, 5th ed.; Spon Press: Abingdon, United Kingdom, 2009.
• 8. M. Delany, E. Bazley; Acoustical properties of fibrous absorbent materials; Appl. Acoust. 1970, 3(2), 105-116. DOI: 10.1016/0003-682X(70)90031-9

Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).