Using MLS methods in laboratory measurement of airborne sound insulation

• Autorzy: Mleczko Dominik

Identyfikatory

DOI

10.21008/j.0860-6897.2021.2.05

• Języki publikacji: EN

Abstrakty

EN

Following the requirements of ISO 10140, to determine the acoustic insulation, measurements of the sound pressure levels in the source (L1) and receiving (L2) rooms and the reverberation time measurements in the receiving room (T) should be performed. However, the standard does not indicate the measuring signal to be used for the measurements. Various measurement methods can be used, including the use of the broadband noise or MLS method. The article examines the influence of the applied measurement methodology on the determined spectra of acoustic insulation and the weighted sound reduction index Rw. The total uncertainty of determining the acoustic insulation properties and partial uncertainties in determining L1, L2 and T were also calculated. The analysis of the obtained results allows concluding that the applied measurement method has no significant impact on the obtained acoustic insulation values, and the obtained measurement differences may rather be the result of an insufficient sample size.

Słowa kluczowe

EN

sound insulation; sound transmission loss; MLS method

PL

izolacyjność akustyczna; izolacyjność akustyczna od dźwięków powietrznych; metoda MLS

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2021
• Tom: Vol. 32, nr 2
• Strony: art. no. 2021205
• Opis fizyczny: Bibliogr. 12 poz., 1 fot., wykr.

Twórcy

autor

Mleczko Dominik

• AGH University of Science and Technology, al. Adama Mickiewicza 30, 30-059 Kraków

Bibliografia

• 1. ISO 10140-4. Acoustics - Laboratory measurement of sound insulation of building elements - Part 4: Measurement procedures and requirements. 2021,
• 2. C.C. Hak, N.H. Van Hout, H.J. Martin. Measuring Sound Insulation using Deconvolution Techniques. J. Acoust. Soc. Am., 123:3501-3501, 2008.
• 3. C. Hopkins. Sound Insulation. Routledge 2020.
• 4. ISO 10140-2. Acoustics. Laboratory measurement of acoustic insulation of building elements. Part 2: Measurement of airborne sound insulation. 2011.
• 5. K. Kosała, L. Majkut, D. Mleczko, R. Olszewski, T. Wszołek. Accuracy of prediction methods for sound insulation of homogeneous single baffles. Vibrations in Physical Systems, 31(2):20202010, 2020.
• 6. D. Mleczko, T. Wszołek. Variability influence of input parameters on result of room acoustic calculation. Acta Phys. Pol. A, 118:128-130, 2010.
• 7. ISO/IEC Guide 98-3:2008 (JCGM/WG1/100). Uncertainty of measurement - Part 3: Guide to the expression of uncertainty in measurement. 2008.
• 8. T. Wszołek. Uncertainty of sound insulation measurement in laboratory. Arch. Acoust., 32(4S):271-277, 2007.
• 9. W. Batko, P. Pawlik. New Method of Uncertainty Evaluation of the Sound Insulation of Partitions. Acta Phys. Pol. A, 123(6):1012-1015, 2013.
• 10. D. Mleczko, T. Wszołek. Effect of diffusing elements in a reverberation room on the results of airborne sound insulation laboratory measurements. Arch. Acoust., 44(4):739-746, 2019.
• 11. ISO 717-1:2021-06. Acoustics - Rating of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation. 2021.
• 12. P. Pawlik, B. Przysucha. Wpływ liczby punktów pomiarowych na niepewność wyznaczania izolacyjności akustycznej przegród budowlanych [In English: The effect of number of measurement points on the uncertainty of the determination of sound insulation of building partitions]. Pomiary Autom. Kontrola, 60(12):1124-1126,2014.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).