Examining influence of primary frequency ratio on distortion product otoacoustic emissions generation using an alternating frequency/time domain cochlear model

2021 ◽  
Vol 150 (4) ◽  
pp. A125-A126
Author(s):  
Haiqi Wen ◽  
Julien Meaud ◽  
Wei Dong ◽  
Sebastiaan Meenderink
Keyword(s):  
Time Domain ◽  
Frequency Ratio ◽  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Cochlear Model ◽  
Distortion Product ◽  
Primary Frequency

scholarly journals Time-domain analysis of distortion-product otoacoustic emissions using a hydrodynamic cochlea model

2017 ◽  
Vol 3 (2) ◽  
pp. 453-456
Author(s):  
Dennis Zelle ◽  
Ernst Dalhoff ◽  
Anthony W. Gummer
Keyword(s):  
Time Domain ◽  
Otoacoustic Emissions ◽  
Short Pulse ◽  
Human Subjects ◽  
Time Domain Analysis ◽  
Distortion Product Otoacoustic Emissions ◽  
Sound Waves ◽  
Cochlear Function ◽  
Distortion Product ◽  
The Time Domain

AbstractAs a by-product of nonlinear amplification in the cochlea, the inner ear emits sound waves in response to two tones with different frequencies. These sound waves are measurable in the ear canal as distortion-product otoacoustic emissions (DPOAEs). DPOAEs putatively consist of two components emerging at different locations in the cochlea. Wave interference between the two components limits the accuracy of DPOAEs as a noninvasive measure of cochlear function. Using short stimulus pulses instead of continuous stimuli, the two DPOAE components can be separated in the time domain due to their different latencies. The present work utilizes a nonlinear hydrodynamic cochlea model to simulate short-pulse DPOAEs in the time domain. When adding irregularities to the mechanical parameters of the model, the simulated DPOAE signals show two distinguishable components and long-lasting beat tones, similar to band-pass filtered experimental data from normal-hearing human subjects. The model results suggest that the beat tones can occur solely due to interference of the coherent-reflection component with the fading nonlinear-distortion component.

Clinical Significance of Probe-tone Frequency Ratio on Distortion Product Otoacoustic Emissions

1993 ◽  
Vol 22 (3) ◽  
pp. 159-164 ◽  
Author(s):  
Lars Holme Nielsen ◽  
Gerald R. Popelka ◽  
Arne Nørby Rasmussen ◽  
Poul Aabo Osterhammel
Keyword(s):  
Clinical Significance ◽  
Frequency Ratio ◽  
Otoacoustic Emissions ◽  
Distortion Product Otoacoustic Emissions ◽  
Tone Frequency ◽  
Probe Tone ◽  
Distortion Product
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