Influence of loudspeaker directivity on the measurement uncertainty

Pedrero González, Antonio; Sanchez Bote, José Luis; Ulin, Vladimir y Diaz Sanchidrian, Cesar (2011). Influence of loudspeaker directivity on the measurement uncertainty. En: "Inter Noise 2011", 04/09/2011 - 07/09/2011, Osaka, Japón. pp. 1-6.

Descripción

Título: Influence of loudspeaker directivity on the measurement uncertainty
Autor/es:
  • Pedrero González, Antonio
  • Sanchez Bote, José Luis
  • Ulin, Vladimir
  • Diaz Sanchidrian, Cesar
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Inter Noise 2011
Fechas del Evento: 04/09/2011 - 07/09/2011
Lugar del Evento: Osaka, Japón
Título del Libro: Proceedings of Inter Noise 2011
Fecha: 2011
Materias:
Escuela: E.U.I.T. Telecomunicación (UPM) [antigua denominación]
Departamento: Ingeniería Audiovisual y Comunicaciones [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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

Más información

ID de Registro: 13091
Identificador DC: http://oa.upm.es/13091/
Identificador OAI: oai:oa.upm.es:13091
URL Oficial: http://www.ince-j.or.jp/conference/internoise2011/index.html
Depositado por: Memoria Investigacion
Depositado el: 04 Dic 2012 09:27
Ultima Modificación: 04 Mar 2015 15:48
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