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Relaxation time of Spontaneous Otoacoustic emission suppressions

Hinterding, Sophie (2018) Relaxation time of Spontaneous Otoacoustic emission suppressions. Master's Internship Report, Biomedical Engineering.

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In some human ears a phenomenon called Spontaneous OtoAcoustic Emissions, further denoted as SOAEs, can be detected as variations in pressure level in the external auditory canal. The SOAE offers a method to assess the frequency tuning selectivity which is one of the key functional properties of the inner ear and has been a fundamental question in hearing research. The method to assess the frequency tuning while using the SOAE is to suppress these emissions. By presenting an external tone into the ear the emissions will be reduced in amplitude, i.e. suppressed. This result can be displayed in a Suppression Tuning Curve, a V-shaped peak which shows the main area of suppression. The aim of this study is to find out more about the SOAE suppressions, mainly to investigate the time dependence of the emission suppression and its side lobe. The final goal is to obtain the time it takes, the relaxation time, for an emission and its side lobe to disappear due to the external tone, and the amount of time after it appears again while the tone is not presented any longer.

Item Type: Thesis (Master's Internship Report)
Supervisor name: Maat, A.
Degree programme: Biomedical Engineering
Thesis type: Master's Internship Report
Language: English
Date Deposited: 15 Oct 2018
Last Modified: 13 Nov 2018 11:26

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