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Memorias de investigación
Research Publications in journals:
A new 3D finite element model of the IEC 60318-1 artificial ear: II. Experimental and numerical validation
Year:2012
Research Areas
  • Electronics engineering
Information
Abstract
In part I, the feasibility of using three-dimensional (3D) finite elements (FEs) to model the acoustic behaviour of the IEC 60318-1 artificial ear was studied and the numerical approach compared with classical lumped elements modelling. It was shown that by using a more complex acoustic model that took account of thermo-viscous effects, geometric shapes and dimensions, it was possible to develop a realistic model. This model then had clear advantages in comparison with the models based on equivalent circuits using lumped parameters. In fact results from FE modelling produce a better understanding about the physical phenomena produced inside ear simulator couplers, facilitating spatial and temporal visualization of the sound fields produced. The objective of this study (part II) is to extend the investigation by validating the numerical calculations against measurements on an ear simulator conforming to IEC 60318-1. For this purpose, an appropriate commercially available device is taken and a complete 3D FE model developed for it. The numerical model is based on key dimensional data obtained with a non-destructive x-ray inspection technique. Measurements of the acoustic transfer impedance have been carried out on the same device at a national measurement institute using the method embodied in IEC 60318-1. Having accounted for the actual device dimensions, the thermo-viscous effects inside narrow slots and holes and environmental conditions, the results of the numerical modelling were found to be in good agreement with the measured values.
International
Si
JCR
Si
Title
Metrologia
ISBN
0026-1394
Impact factor JCR
1,75
Impact info
Volume
49
http://dx.doi.org/10.1088/0026-1394/49/6/785
Journal number
6
From page
785
To page
802
Month
DICIEMBRE
Ranking
13/58
Participants
  • Autor: Mariano Ruiz Gonzalez (UPM)
  • Autor: Guillermo de Arcas Castro (UPM)
  • Autor: Juan Manuel Lopez Navarro (UPM)
  • Autor: Jesús Alonso Fernández (UPM)
  • Autor: Agustin Bravo
  • Autor: Richard Barham (National Physical Laboratory)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Investigación en Instrumentación y Acústica Aplicada (I2A2)
  • Departamento: Sistemas Electrónicos y de Control
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