Memorias de investigación
Ponencias en congresos:
Influence of loudspeaker directivity on the measurement uncertainty
Año:2011
Áreas de investigación
  • Ingenierías,
  • Ingeniería civil y arquitectura
Datos
Descripción
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.
Internacional
Si
Nombre congreso
Internoise 2011
Tipo de participación
960
Lugar del congreso
Osaka, Japón
Revisores
Si
ISBN o ISSN
0105-175x
DOI
Fecha inicio congreso
04/09/2011
Fecha fin congreso
07/09/2011
Desde la página
1
Hasta la página
6
Título de las actas
Proceedings del Congreso
Esta actividad pertenece a memorias de investigación
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Acústica Arquitectónica
  • Departamento: Ingeniería Audiovisual y Comunicaciones