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Influence of calibration methods and insertion depth on DPOAE level and behavioral threshold tests

Pijpaert, Arthur (2018) Influence of calibration methods and insertion depth on DPOAE level and behavioral threshold tests. Bachelor's Thesis, Life Science and Technology.

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Abstract

Two studies are reviewed that compared methods to calibrate stimuli for DPOAE level measurements and behavioral threshold measurements. The calibration methods were tested on the influence of insertion depth on the outcomes of the tests. Three different calibration methods were tested, being sound pressure level (SPL), forward pressure level (FPL) and sound intensity level (SIL) calibration. SPL calibration is highly affected by standing waves, where FPL and SIL are theoretically unaffected by standing waves. A Theoretical explanation is outlined on how Thévenin-source characteristics can be obtained which are needed to calculate FPL and SIL. The first study that is reviewed, did DPOAE level measurements with five different stimulus levels, ranging from 20 to 60 dB and over a range of 1 to 8 kHz. Both studies showed that using FPL is advantageous over using SPL to calibrate the stimulus. SIL showed similar differences in DPOAE levels as a FPL calibration stimulus, but further research on the SIL calibration methods must be done for both DPOAE level and behavioral threshold measurements.

Item Type: Thesis (Bachelor's Thesis)
Supervisor:
Supervisor nameSupervisor E mail
Dijk, P. vanp.van.dijk@umcg.nl
Maat, A.a.maat@umcg.nl
Degree programme: Life Science and Technology
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 31 Jul 2018
Last Modified: 04 Sep 2018 13:47
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/18160

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