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Open AccessArticle

Advanced Rating Method of Airborne Sound Insulation

IBN Bauphysik GmbH & Co. KG, Theresienstr. 28, 85049 Ingolstadt, Germany
Academic Editor: Gino Iannace
Appl. Sci. 2016, 6(11), 322; https://doi.org/10.3390/app6110322
Received: 15 September 2016 / Revised: 19 October 2016 / Accepted: 20 October 2016 / Published: 26 October 2016
(This article belongs to the Special Issue Noise and Vibration Control in the Built Environment)
This paper describes an advanced calculation scheme based on the loudness level linked to the specific fluctuation strength yielding a weighted normalized loudness level difference as a single number value. This advanced rating method is a useful tool investigating airborne sound insulation. Evidence has been presented that a simple level difference is not a suitable method to exhibit the effects of a given signal to the airborne sound insulation. Additionally, while using a weighted normalized loudness level difference, the effect of different test signals results in a significant influence in the single number value. By analyzing the difference between the standard airborne sound insulation value and the weighted normalized loudness level difference, the sound pressure level that is transmitted through a partition is demonstrated to contain important details concerning the subjective assessment. This study supports findings in the literature that airborne sound insulation performance is significantly dependent on what type of sound signal is used. This paper investigates six different thicknesses of a sand-lime brick using five different sound samples. The study indicates that no single number value can be modeled at this time in relation to a certain construction to fulfill comparable results related to a hearing sensation. View Full-Text
Keywords: airborne sound insulation; subjective assessment; loudness; sound signal; level difference; transmission loss; weighted sound reduction index; assessment; noise awareness airborne sound insulation; subjective assessment; loudness; sound signal; level difference; transmission loss; weighted sound reduction index; assessment; noise awareness
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Neubauer, R.O. Advanced Rating Method of Airborne Sound Insulation. Appl. Sci. 2016, 6, 322.

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