Non-linear maximum length sequences for the acquisition of the auditory brainstem response

A number of quasi-periodic and pseudo-random acoustic stimuli, such as the Q-sequence (QSD) and maximum length sequences (MLS), have been proposed to improve the acquisition efficiency of the auditory brainstem response (ABR). However, these methods are only optimal under the assumption that the ABR...

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Main Authors:	Bradley, Andrew P., Smith, Andrew, Petoe, Matthew, Dzulkarnain, Ahmad Aidil Arafat, Wilson, Wayne J.
Format:	Conference or Workshop Item
Language:	English English
Published:	2014
Subjects:	RF Otorhinolaryngology
Online Access:	http://irep.iium.edu.my/36594/ http://irep.iium.edu.my/36594/ http://irep.iium.edu.my/36594/1/XXXII_WCA_2014_Posters.pdf http://irep.iium.edu.my/36594/5/aidil.pdf

id	iium-36594
recordtype	eprints
spelling	iium-365942015-10-25T07:42:15Z http://irep.iium.edu.my/36594/ Non-linear maximum length sequences for the acquisition of the auditory brainstem response Bradley, Andrew P. Smith, Andrew Petoe, Matthew Dzulkarnain, Ahmad Aidil Arafat Wilson, Wayne J. RF Otorhinolaryngology A number of quasi-periodic and pseudo-random acoustic stimuli, such as the Q-sequence (QSD) and maximum length sequences (MLS), have been proposed to improve the acquisition efficiency of the auditory brainstem response (ABR). However, these methods are only optimal under the assumption that the ABR is acquired from a linear, time-invariant system, which the auditory system is not. The aim of this work was to investigate whether the MLS reconstruction algorithm could be improved by assuming these non-linearities are both static and invertible. The expected amplitude and latency variation of ABR wave V was modelled using conventional linear reconstruction techniques on data acquired from a single neonate subject at click rates of: 23, 33, 66, 90, 133, 282 and 481 clicks per second (cps) and stimulus intensities of: 35, 45, 55 and 65 dBnHL. MLS ABRs, reconstructed using this model, were then acquired from 16 neonates at a stimulus intensity of 35dBnHL and rates of 90, 133, 282 and 481 cps. The signal-to-noise-ratios of both the linear and non-linear MLS reconstructions were compared using the single point statistic (Fsp). Results showed that, over all rates tested, there was little benefit from the non-linear reconstruction, aside from a marginal improvement in Fsp at the lowest two rates. This would indicate that the non-linearities observed in ABR waveforms are not well modelled as static and invertible and that it is yet to be determined how the ABR adapts, dynamically, to the changes in ISI implicit to pseudo-random sequences. 2014 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/36594/1/XXXII_WCA_2014_Posters.pdf application/pdf en http://irep.iium.edu.my/36594/5/aidil.pdf Bradley, Andrew P. and Smith, Andrew and Petoe, Matthew and Dzulkarnain, Ahmad Aidil Arafat and Wilson, Wayne J. (2014) Non-linear maximum length sequences for the acquisition of the auditory brainstem response. In: XXXIV World Congress of Audiology, 3-7 May 2014, Brisbane Convention and Exhibition Centre, Brisbane. (Unpublished) http://www.wca2014.com/
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	RF Otorhinolaryngology
spellingShingle	RF Otorhinolaryngology Bradley, Andrew P. Smith, Andrew Petoe, Matthew Dzulkarnain, Ahmad Aidil Arafat Wilson, Wayne J. Non-linear maximum length sequences for the acquisition of the auditory brainstem response
description	A number of quasi-periodic and pseudo-random acoustic stimuli, such as the Q-sequence (QSD) and maximum length sequences (MLS), have been proposed to improve the acquisition efficiency of the auditory brainstem response (ABR). However, these methods are only optimal under the assumption that the ABR is acquired from a linear, time-invariant system, which the auditory system is not. The aim of this work was to investigate whether the MLS reconstruction algorithm could be improved by assuming these non-linearities are both static and invertible. The expected amplitude and latency variation of ABR wave V was modelled using conventional linear reconstruction techniques on data acquired from a single neonate subject at click rates of: 23, 33, 66, 90, 133, 282 and 481 clicks per second (cps) and stimulus intensities of: 35, 45, 55 and 65 dBnHL. MLS ABRs, reconstructed using this model, were then acquired from 16 neonates at a stimulus intensity of 35dBnHL and rates of 90, 133, 282 and 481 cps. The signal-to-noise-ratios of both the linear and non-linear MLS reconstructions were compared using the single point statistic (Fsp). Results showed that, over all rates tested, there was little benefit from the non-linear reconstruction, aside from a marginal improvement in Fsp at the lowest two rates. This would indicate that the non-linearities observed in ABR waveforms are not well modelled as static and invertible and that it is yet to be determined how the ABR adapts, dynamically, to the changes in ISI implicit to pseudo-random sequences.
format	Conference or Workshop Item
author	Bradley, Andrew P. Smith, Andrew Petoe, Matthew Dzulkarnain, Ahmad Aidil Arafat Wilson, Wayne J.
author_facet	Bradley, Andrew P. Smith, Andrew Petoe, Matthew Dzulkarnain, Ahmad Aidil Arafat Wilson, Wayne J.
author_sort	Bradley, Andrew P.
title	Non-linear maximum length sequences for the acquisition of the auditory brainstem response
title_short	Non-linear maximum length sequences for the acquisition of the auditory brainstem response
title_full	Non-linear maximum length sequences for the acquisition of the auditory brainstem response
title_fullStr	Non-linear maximum length sequences for the acquisition of the auditory brainstem response
title_full_unstemmed	Non-linear maximum length sequences for the acquisition of the auditory brainstem response
title_sort	non-linear maximum length sequences for the acquisition of the auditory brainstem response
publishDate	2014
url	http://irep.iium.edu.my/36594/ http://irep.iium.edu.my/36594/ http://irep.iium.edu.my/36594/1/XXXII_WCA_2014_Posters.pdf http://irep.iium.edu.my/36594/5/aidil.pdf
first_indexed	2018-09-07T05:47:43Z
last_indexed	2018-09-07T05:47:43Z
_version_	1610926536396898304

Non-linear maximum length sequences for the acquisition of the auditory brainstem response

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