| Nonlinearity in eardrum vibration as a function of frequency and sound pressure. | |
| | |
MedLine Citation:
|
PMID: 20026266 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
It is generally accepted that the middle ear acts mainly as a linear system for sound pressures up to 130 dB SPL in the auditory frequency range. However, at quasi-static pressure loads a strong nonlinear response has been demonstrated. Consequently, small nonlinear distortions may also be present in the middle ear response in the auditory frequency range. A new measurement method was developed to quickly determine vibration response, nonlinear distortions and noise level of acoustically driven biomechanical systems. Specially designed multisines are used for the excitation of the test system. The method is applied on a gerbil eardrum for sound pressures ranging from 90 to 120 dB SPL and for frequencies ranging from 125 Hz to 16 kHz. The experiments show that nonlinear distortions rise above noise level at a sound pressure of 96 dB SPL, and they grow as sound pressure increases. Post-mortem changes in the middle ear influence the nonlinear distortions rapidly until a stabilization occurs after approximately 3h. |
| | |
Authors:
|
J R M Aerts; J J J Dirckx |
Related Documents
:
|
20330576 - Forward-pressure level for in-the-ear calibration. 6936096 - Velar stretch as a function of task. 18531396 - Theoretical and experimental results of phonation threshold pressure vs. oscillation fr... 17155106 - Dynamical systems techniques reveal the sexual dimorphic nature of motor patterns in bi... 17932096 - Do you get value for money when you buy an expensive pair of running shoes? 7549136 - Daytime hypertension and the effects of short-term nasal continuous positive airway pre... |
Publication Detail:
|
Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, U.S. Gov't, Non-P.H.S. Date: 2009-12-21 |
Journal Detail:
|
Title: Hearing research Volume: 263 ISSN: 1878-5891 ISO Abbreviation: Hear. Res. Publication Date: 2010 May |
Date Detail:
|
Created Date: 2010-05-10 Completed Date: 2010-08-20 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7900445 Medline TA: Hear Res Country: Netherlands |
Other Details:
|
Languages: eng Pagination: 26-32 Citation Subset: IM |
Copyright Information:
|
Copyright (c) 2009 Elsevier B.V. All rights reserved. |
Affiliation:
|
Laboratory of BioMedical Physics, University of Antwerp, Antwerp, Belgium. johan.aerts@ua.ac.be |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Acoustic Impedance Tests Acoustic Stimulation Animals Biomechanics Cochlea / physiology Gerbillinae / physiology Hearing / physiology Nonlinear Dynamics Postmortem Changes Pressure Tympanic Membrane / physiology* Vibration |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Five years treatment with strontium ranelate reduces vertebral and nonvertebral fractures and increa...
Next Document: Heterogeneous distribution of SNPs in the human genome: Microsatellites as predictors of nucleotide ...