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Influence of loudspeaker directivity on the measurement uncertainty of the acoustic testing of facades.
Pedrero González, Antonio and Sánchez Bote, José Luis and Ulin Nabatov, Vladimir Ivanov and Díaz Sanchidrián, César
Influence of loudspeaker directivity on the measurement uncertainty of the acoustic testing of facades..
In: "40th International Congress and Exposition on Noise Control Engineering 2011 (INTER-NOISE 2011)", 04/09/2011 - 07/09/2011, Osaka, Japón. ISBN 9781618392800. pp. 1697-1702.
||Influence of loudspeaker directivity on the measurement uncertainty of the acoustic testing of facades.
Pedrero González, Antonio
Sánchez Bote, José Luis
Ulin Nabatov, Vladimir Ivanov
Díaz Sanchidrián, César
Presentation at Congress or Conference
||40th International Congress and Exposition on Noise Control Engineering 2011 (INTER-NOISE 2011)
||04/09/2011 - 07/09/2011
|Title of Book:
||Proceedings of 40th International Congress and Exposition on Noise Control Engineering 2011 (INTER-NOISE 2011)
||E.U.I.T. Telecomunicación (UPM)
||Ingeniería Audiovisual y Comunicaciones [hasta 2014]
|Creative Commons Licenses:
||Recognition - No derivative works - Non commercial
One of the most significant aspects of a building?s acoustic behavior is the airborne sound insulation of the
room façades, since this determines the protection of its inhabitants against environmental noise. For this
reason, authorities in most countries have established in their acoustic regulations for buildings the minimum
value of sound insulation that must be respected for façades.
In order to verify compliance with legal requirements it is usual to perform acoustic measurements in the
finished buildings and then compare the measurement results with the established limits. Since there is
always a certain measurement uncertainty, this uncertainty must be calculated and taken into account in order
to ensure compliance with specifications.
The most commonly used method for measuring sound insulation on façades is the so-called Global
Loudspeaker Method, specified in ISO 140-5:1998. This method uses a loudspeaker placed outside the
building as a sound source. The loudspeaker directivity has a significant influence on the measurement
results, and these results may change noticeably by choosing different loudspeakers, even though they all
fulfill the directivity requirements of ISO 140-5.
This work analyzes the influence of the loudspeaker directivity on the results of façade sound insulation
measurement, and determines its contribution to measurement uncertainty. The theoretical analysis is
experimentally validated by means of an intermediate precision test according to ISO 5725-3:1994, which
compares the values of sound insulation obtained for a façade using various loudspeakers with different
Keywords: Uncertainty, Façade, Insulation
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