The effect of stimulus rate and time-separation on Volterra slices of otoacoustic emissions
The effect of stimulus rate and time-separation on Volterra slices of otoacoustic emissions
Volterra slices (VSs) of otoacoustic emissions are temporal non-linear interaction components which can be measured using the maximum length sequence technique of stimulation. Previous studies have found, but not explained, non-monotonic variations in the amplitude of VSs when stimulus rate is increased. In this study, a simple phenomenological model is investigated which provided possible insights into the effect of rate on VS amplitudes. Resulting theoretical considerations suggest that the effect of rate on VS amplitude is best examined when the time-separation parameter of the VS is held constant. To test these suggestions, data on VSs of order 2 and 3 were measured in 24 normal hearing ears in which the rate is varied while holding constant the time-separation. Under these conditions, the results reveal a monotonic reduction in the amplitude of the VSs with increasing rate. The phenomenological model offers a possible explanation of some of these results in terms of the derivatives of the input–output function of the non-linearity. In addition, measured cross-correlations between waveforms of VS of different order and slice number were obtained, revealing a complex dependence on time-separation that has not been explained.
otoacoustic emissions, maximum length sequences, non-linearity temporal interaction, volterra series
34-53
Lineton, B.
1ace4e96-34da-4fc4-bc17-a1d82b2ba0e2
Kuponiyi, O.
af68e9c5-25fe-4d1c-83f3-3dbdab4fcf97
Thornton, A.R.
bebeeb6d-cc25-4948-b858-5b5d5e9601cd
May 2008
Lineton, B.
1ace4e96-34da-4fc4-bc17-a1d82b2ba0e2
Kuponiyi, O.
af68e9c5-25fe-4d1c-83f3-3dbdab4fcf97
Thornton, A.R.
bebeeb6d-cc25-4948-b858-5b5d5e9601cd
Lineton, B., Kuponiyi, O. and Thornton, A.R.
(2008)
The effect of stimulus rate and time-separation on Volterra slices of otoacoustic emissions.
Hearing Research, 239 (1-2), .
(doi:10.1016/j.heares.2008.01.006).
Abstract
Volterra slices (VSs) of otoacoustic emissions are temporal non-linear interaction components which can be measured using the maximum length sequence technique of stimulation. Previous studies have found, but not explained, non-monotonic variations in the amplitude of VSs when stimulus rate is increased. In this study, a simple phenomenological model is investigated which provided possible insights into the effect of rate on VS amplitudes. Resulting theoretical considerations suggest that the effect of rate on VS amplitude is best examined when the time-separation parameter of the VS is held constant. To test these suggestions, data on VSs of order 2 and 3 were measured in 24 normal hearing ears in which the rate is varied while holding constant the time-separation. Under these conditions, the results reveal a monotonic reduction in the amplitude of the VSs with increasing rate. The phenomenological model offers a possible explanation of some of these results in terms of the derivatives of the input–output function of the non-linearity. In addition, measured cross-correlations between waveforms of VS of different order and slice number were obtained, revealing a complex dependence on time-separation that has not been explained.
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Submitted date: 27 September 2007
e-pub ahead of print date: 20 January 2008
Published date: May 2008
Keywords:
otoacoustic emissions, maximum length sequences, non-linearity temporal interaction, volterra series
Organisations:
Human Sciences Group
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Local EPrints ID: 57777
URI: http://eprints.soton.ac.uk/id/eprint/57777
ISSN: 0378-5955
PURE UUID: 9c69ff13-987a-4292-8da7-a05a44b77621
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Date deposited: 19 Aug 2008
Last modified: 16 Mar 2024 03:31
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Author:
O. Kuponiyi
Author:
A.R. Thornton
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