Influence of loudspeaker directivity on the measurement uncertainty

Pedrero González, Antonio ORCID:, Sánchez Bote, José Luis ORCID:, Ulin, Vladimir and Díaz Sanchidrián, César ORCID: (2011). Influence of loudspeaker directivity on the measurement uncertainty. In: "Inter Noise 2011", 04/09/2011 - 07/09/2011, Osaka, Japón. pp. 1-6.


Title: Influence of loudspeaker directivity on the measurement uncertainty
Item Type: Presentation at Congress or Conference (Article)
Event Title: Inter Noise 2011
Event Dates: 04/09/2011 - 07/09/2011
Event Location: Osaka, Japón
Title of Book: Proceedings of Inter Noise 2011
Date: 2011
Faculty: E.U.I.T. Telecomunicación (UPM)
Department: Ingeniería Audiovisual y Comunicaciones
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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 directivities

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Item ID: 13091
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Deposited by: Memoria Investigacion
Deposited on: 04 Dec 2012 09:27
Last Modified: 20 May 2020 09:31
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