Qualitative behaviour of L1 and L2 standard deviation in insulations measurements according to standard UNE EN ISO 140-4

Navacerrada Saturio, Maria Angeles; Diaz Sanchidrian, Cesar y Pedrero González, Antonio (2011). Qualitative behaviour of L1 and L2 standard deviation in insulations measurements according to standard UNE EN ISO 140-4. En: "Forum Acusticum 2011", 26/06/2011 - 01/07/2011, Aalborg, Dinamarca. pp. 2605-2610.

Descripción

Título: Qualitative behaviour of L1 and L2 standard deviation in insulations measurements according to standard UNE EN ISO 140-4
Autor/es:
  • Navacerrada Saturio, Maria Angeles
  • Diaz Sanchidrian, Cesar
  • Pedrero González, Antonio
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Forum Acusticum 2011
Fechas del Evento: 26/06/2011 - 01/07/2011
Lugar del Evento: Aalborg, Dinamarca
Título del Libro: Proceedings of Forum Acusticum 2011
Fecha: 2011
Materias:
Escuela: E.T.S. Arquitectura (UPM)
Departamento: Física e Instalaciones Aplicadas a la Edificación, al Medio Ambiente y al Urbanismo [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Knowledge of the uncertainty of measurement of testing results is important when results have to be compared with limits and specifications. In the measurement of sound insulation following standards UNE EN ISO 140-4 the uncertainty of the final magnitude is mainly associated to the average sound pressure levels L1 and L2 measured. A parameter that allows us to quantify the spatial variation of the sound pressure level is the standard deviation of the pressure levels measured at different points of the room. In this work, for a wide number of measurements following standards UNE EN ISO 140-4 we analyzed qualitatively the behaviour of the standard deviation for L1 and L2. The study of sound fields in enclosed spaces is very difficult. There are a wide variety of rooms with different sound fields depending on factors as volume, geometry and materials. In general, we observe that the L1 and L2 standard deviations contain peaks and dips independent on characteristics of the rooms at single frequencies that could correspond to critical frequencies of walls, floors and windows or even to temporal alterations of the sound field. Also, in most measurements according to UNE EN ISO 140-4 a large similitude between L1 and L2 standard deviation is found. We believe that such result points to a coupled system between source and receiving rooms, mainly at low frequencies the shape of the L1 and L2 standard deviations is comparable to the velocity level standard deviation on a wall

Más información

ID de Registro: 12830
Identificador DC: http://oa.upm.es/12830/
Identificador OAI: oai:oa.upm.es:12830
URL Oficial: http://www.fa2011.org/
Depositado por: Memoria Investigacion
Depositado el: 13 Nov 2012 11:06
Ultima Modificación: 04 Mar 2015 15:49
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