R. del Rey

New absorbent material acoustic based on kenaf’s fibre

This project has been funded by the Ministry of Education and Science. DG Research (BIA2007-C02-01 y BIA2007-C02-02).

Nuevos materiales absorbentes acústicos basados en fibra de kenaf

This project has been funded by the Ministry of Education and Science. DG Research (BIA2007-C02-01 y BIA2007-C02-02).

Vibration Reduction Index of a T-Junction With a Flexible Interlayer

This paper describes the procedure followed to evaluate the vibration reduction index for T-junctions with inserted flexible elements and proposes new equations to complement the standard EN 12354-1:2000. The experiment described in this work is based on a 1:3 scale model of a T-junction with a flexible interlayer. It was used to obtain a significant reduction in the cost of the configurations under study. We chose to carry out vibration measurements by near-field acoustic holography (NAH) in order to avoid the risk of accelerometer interference. Flanking transmission was determined for different elastic layers with the objective of quantifying the effect of the flexible interlayer and to compare the results obtained with predictive formulas. The results enabled us to propose new equations to complement EN 12354-1:2000 for the reliable prediction of the apparent sound reduction index. The uncertainty associated with the different average velocity levels is determined according to the Guide for the Expression of Uncertainty of Measurement (GUM).

Acoustic Environmental Monitoring System for Acoustic Maps

In this work, it is developed a data acquisition and analysis system for the monitoring of acoustic environmental noises and the elaboration of dynamic acoustic maps. This project is based on the obtaining of acoustic data in different measure points, and it is formed by a mesh of connections based on GPRS NODES and a Software Server for the administration and control of the data.

Detección de puntos débiles de aislamiento acústico en edificación ya construida

Este trabajo ha sido financiado por el Ministerio de Educacion y Ciencia. DG RESEARCH (BIA2007-C02-01 y BIA2007-C02-02) y por el Ministerio de Ciencia e Innovacion (BIA2010-17723).