Title
LDV measurement of small nonlinearities in flat and curved membranes. A model for eardrum nonlinear acoustic behaviourLDV measurement of small nonlinearities in flat and curved membranes. A model for eardrum nonlinear acoustic behaviour
Author
Faculty/Department
Faculty of Sciences. Physics
Research group
Biophysics and Biomedical Physics
Publication type
conferenceObject
Publication
Melville :Amer inst physics,
Subject
Physics
Source (journal)
Measurements by Laser and Noncontact Techniques: Advances and Applications
AIP conference proceedings / American Institute of Physics. - New York
Source (book)
12th International AIVELA Conference on Vibration Measurements by Laser, and Noncontact Techniques - Advances and Applications, JUN 29-JUL 01, 2016, Ancona, ITALY
Volume/pages
1740(2016), 10 p.
ISSN
0094-243X
0094-243X
Article Reference
050005
ISBN
978-0-7354-1397-9
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Laser Doppler Vibrometry is an intrinsic highly linear measurement technique which makes it a great tool to measure extremely small nonlinearities in the vibration response of a system. Although the measurement technique is highly linear, other components in the experimental setup may introduce nonlinearities. An important source of artificially introduced nonlinearities is the speaker, which generates the stimulus. In this work, two correction methods to remove the effects of stimulus nonlinearity are investigated. Both correction methods were found to give similar results but have different pros and cons. The aim of this work is to investigate the importance of the conical shape of the eardrum as a source of nonlinearity in hearing. We present measurements on flat and indented membranes. The data shows that the curved membrane exhibit slightly higher levels of nonlinearity compared to the flat membrane.
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