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Memorias de investigación
Communications at congresses:
Influence of loudspeaker directivity on the measurement uncertainty of the acoustic testing of facades
Year:2011
Research Areas
  • Electronic technology and of the communications
Information
Abstract
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. Keywords: Uncertainty, Façade, Insulation
International
No
Congress
INTER NOISE 2011
960
Place
Osaka, Japón
Reviewers
Si
ISBN/ISSN
9781618392800
Start Date
04/09/2011
End Date
07/09/2011
From page
1697
To page
1702
NOISE CONTROL ENGINEERING. INTERNATIONAL CONGRESS AND EXPOSITION. 40TH 2011
Participants
  • Autor: Antonio Pedrero Gonzalez (UPM)
  • Autor: Jose Luis Sanchez Bote (UPM)
  • Autor: Vladimir Ivanov Ulin Nabatov (UPM)
  • Autor: Julian Cesar Diaz Sanchidrian (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Audiovisual y Comunicaciones
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