The influence of the total loss factor of building elements on their sound insulation is well known, although the problem of measuring this value was up to now not solved completely.
This article describes an improved measuring method for total loss factors of building products especially for heavy elements. Furthermore, the principle of conversion of different results for transmission loss of the same type of wall under different mounting conditions using the total loss factor is presented. Measurement results in a transmission suite were examined and corrected with values derived from the improved measuring method.
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References
1.
CraikR.J.M.; The Influence of the Laboratories on Measurements of a Wall Performance; Applied Acoustics35 (1992), 25–46.
2.
GerretsenE.; How indifferent is the Sound Reduction Index of Wall to its Boundary Conditions?, Proceedings of the INTER-NOISE90, 47–50.
3.
ISO 140 (1997): Building acoustics – Measurement of sound insulation in buildings and of building elements.
4.
MeierA.SchmitzA.; Discussion of total loss factor measurement method for building elements; Proceedings of the INTER-NOISE 97, 1477–1480.
5.
JacobsenF.; A Note on Acoustic Decay Measurement; Journal of Sound and Vibration (1987) 115(3), 163–170.
6.
JacobsenF.RindelJ.H.; Time Reversed Decay Measurements; Journal of Sound and Vibration117(1) (1987), 187–190.
7.
Nordtest Method NT ACOU 090 (1994); Building structures, Junctions: Transmission of Vibration – Field measurements. 4–5.
8.
EN 12354: Building acoustics – Estimation of acoustic performance of buildings from the performance of products.
9.
KuttruffH. (1958); Eigenschaften und Auswertung von Nachhallkurven (Characteristics and evaluation of decay curves). Acustica8 (1958); 273–280.
10.
CremerL.HecklM.; Körperschall – Physikalische Grundlagen und technische Anwendungen; Springer-Verlag1995, 532. alternative: Structure-Borne Sound; Second edition, Springer1988.
11.
SchroederM.R.; New Method of Measuring Reverberation Time; Journal of the Acoustical Society America37 (1965), 409–412.
12.
KobM.; Forschungsstudie zur Entwicklung einer Meßmethode für kurze Körperschall-Nachhallzeiten (Development of a measuring method of short structural reverberation times); Institute of Technical Acoustics (September 1997), Technical University Aachen, Germany.
13.
MeierA.Determination of energy flow to improve sound insulation measurements. Paper No. 449; Proceedings of the INTER-NOISE 1998.
14.
CraikR.J.M.; Sound Transmission through Buildings using Statistical Energy Analysis; Gower Publishing Limited1996.
15.
LeppingtonF.G.BroadbentE.G.HeronK.H.; Acoustic radiation from rectangular panels with constrained edges; Proc. Royal Soc. London A393 (1984), 67–84.
