The impact of diffuser arrangement in a reverberation room on airborne sound insulation measurements

• Autorzy: Mleczko Dominik , Sapieja Kinga

Identyfikatory

DOI

10.21008/j.0860-6897.2024.3.19

• Języki publikacji: EN

Abstrakty

EN

The primary issue in evaluating airborne sound insulation lies in quantifying the sound energy emitted by the barrier. This is typically accomplished by measuring sound pressure levels in sending and receiving rooms and acoustic absorption within the receiving room. When significant fluctuations in sound pressure levels occur within a reverberation room, it indicates the presence of standing waves, necessitating the incorporation of diffusing elements. The paper presents the results of computational modelling calculations for various configurations of diffusing elements in a reverberation room. These diffusers aim to improve the uniformity of the acoustic field in terms of acoustic pressure. Therefore, the focus of the model was on these parameters. The simulation results were verified by conducting acoustic measurements in an actual room. The ultimate goal was to assess the impact of changes in the arrangement of diffusers on the results of sound insulation measurements. As an additional criterion for evaluating the obtained results, the measurement uncertainty of sound insulation with partial uncertainties was adopted.

Słowa kluczowe

EN

airborne sound insulation; sound transmission loss; acoustic diffuser; acoustic modelling; finite element method; acoustics; reverberation room; standing waves

PL

izolacyjność od dźwięków powietrznych; strata transmisji dźwięku; dyfuzor akustyczny; metoda elementów skończonych; akustyka; komora pogłosowa; fale stojące

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2024
• Tom: Vol. 35, nr 3
• Strony: art. no. 2024319
• Opis fizyczny: Bibliogr. 13 poz., il. kolor., 1 fot., wykr.

Twórcy

autor

Mleczko Dominik

• AGH University of Krakow, al. Adama Mickiewicza 30, 30-059 Kraków

• https://orcid.org/0000-0003-4066-9713

autor

Sapieja Kinga

Bibliografia

• 1. ISO 10140-5; Acoustics - Laboratory measurement of sound insulation of building elements - Part 5: Requirements for test facilities and equipment, 2021
• 2. PN-EN ISO 354; Acoustics - Measurement of sound absorption in a reverberation room, 2005
• 3. ISO 10140-2; Acoustics. Laboratory measurement of acoustic insulation of building elements. Part 2: Measurement of airborne sound insulation, 2021
• 4. S. Zhang, J. Lee; Diffuseness Quantification in a Reverberation Chamber and Its Variation with Fine-Resolution Measurements; Buildings, 2021, 11(3), 519
• 5. W.B. Joyce; Exact effect of surface roughness on the reverberation time of a uniformly absorbing spherical enclosure; J. Acoust. Soc. Am., 1978, 64(5), 1429-1436
• 6. W. Batko, P. Pawlik; New Method of Uncertainty Evaluation of the Sound Insulation of Partitions; Acta Phys. Pol. A, 2013, 123(6), 1012-1015
• 7. T.M. El-Basheer, R.S. Youssef, H.Kh. Mohamed; NIS method for uncertainty estimation of airborne sound insulation measurement in field; International Journal of Metrology and Quality Engineering 2017, 8, 19; DOI: 10.1051/ijmqe/2017009
• 8. C. Scrosati, et al.; Towards more reliable measurements of sound absorption coefficient in reverberation rooms: An Inter-Laboratory Test; Applied Acoustics, 2020, 165, 107298-107316
• 9. D. Mleczko, T. Wszołek; Effect of diffusing elements in a reverberation room on the results of airborne sound insulation laboratory measurements; Archives of Acoustics, 2019, 44(4), 739-746
• 10. T. Wszołek; Uncertainty of sound insulation measurement in laboratory; Archives of Acoustics, 2007, 32(4), 271-277
• 11. D. Mleczko, T. Wszołek; Charakterystyki źródła dźwięku do badania własności akustycznych wnętrz (in Polish), In: Materiały XXXV Zimowej Szkoły Zwalczania Zagrożeń Wibroakustycznych: Gliwice-Ustroń, 26.02-2.03.2007. Gliwice, Oddział Górnośląski Polskiego Towarzystwa Akustycznego, Instytut Fizyki Politechniki Śląskiej 2007, 111-118
• 12. D. Mleczko, T. Wszołek; Variability influence of input parameters on result of room acoustic calculation; Acta Phys. Pol. A, 2010, 118(3), 1; DOI: 10.12693/APhysPolA.118.128
• 13. ISO/IEC Guide 98-3:2008 (JCGM/WG1/100); Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement, 2008