Cortical auditory evoked potential time-frequency growth functions for fully objective hearing threshold estimation

Publication date: Available online 28 September 2018

Source: Hearing Research

Author(s): Darren Mao, Hamish Innes-Brown, Matthew A. Petoe, Yan T. Wong, Colette M. McKay

Abstract

Cortical auditory evoked potential (CAEPs) thresholds have been shown to correlate well with behaviourally determined hearing thresholds. Growth functions of CAEPs show promise as an alternative to single level detection for objective hearing threshold estimation; however, the accuracy and clinical relevance of this method is not well examined.

In this study, we used temporal and spectral CAEP features to generate feature growth functions. Spectral features may be more robust than traditional peak-picking methods where CAEP morphology is variable, such as in children or hearing device users. Behavioural hearing thresholds were obtained and CAEPs were recorded in response to a 1 kHz puretone from twenty adults with no hearing loss. Four features, peak-to-peak amplitude, root-mean-square, peak spectral power and peak phase-locking value (PLV) were extracted from the CAEPs. Functions relating each feature with stimulus level were used to calculate objective hearing threshold estimates. We assessed the performance of each feature by calculating the difference between the objective estimate and the behaviourally-determined threshold.

We compared the accuracy of the estimates using each feature and found that the peak PLV feature performed best, with a mean threshold error of 2.7 dB and standard deviation of 5.9 dB across subjects from behavioural threshold. We also examined the relation between recording time, data quality and threshold estimate errors, and found that on average for a single threshold, 12.7 minutes of recording was needed for a 95% confidence that the threshold estimate was within 20 dB of the behavioural threshold, using the peak-to-peak amplitude feature, while 14 minutes is needed for the peak PLV feature. These results show that the PLV of CAEPs can be used to find a clinically relevant hearing threshold estimate. Its potential stability in differing morphology may be an advantage in testing infants or cochlear implant users.

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Cortical auditory evoked potential time-frequency growth functions for fully objective hearing threshold estimation

Publication date: Available online 28 September 2018

Source: Hearing Research

Author(s): Darren Mao, Hamish Innes-Brown, Matthew A. Petoe, Yan T. Wong, Colette M. McKay

Abstract

Cortical auditory evoked potential (CAEPs) thresholds have been shown to correlate well with behaviourally determined hearing thresholds. Growth functions of CAEPs show promise as an alternative to single level detection for objective hearing threshold estimation; however, the accuracy and clinical relevance of this method is not well examined.

In this study, we used temporal and spectral CAEP features to generate feature growth functions. Spectral features may be more robust than traditional peak-picking methods where CAEP morphology is variable, such as in children or hearing device users. Behavioural hearing thresholds were obtained and CAEPs were recorded in response to a 1 kHz puretone from twenty adults with no hearing loss. Four features, peak-to-peak amplitude, root-mean-square, peak spectral power and peak phase-locking value (PLV) were extracted from the CAEPs. Functions relating each feature with stimulus level were used to calculate objective hearing threshold estimates. We assessed the performance of each feature by calculating the difference between the objective estimate and the behaviourally-determined threshold.

We compared the accuracy of the estimates using each feature and found that the peak PLV feature performed best, with a mean threshold error of 2.7 dB and standard deviation of 5.9 dB across subjects from behavioural threshold. We also examined the relation between recording time, data quality and threshold estimate errors, and found that on average for a single threshold, 12.7 minutes of recording was needed for a 95% confidence that the threshold estimate was within 20 dB of the behavioural threshold, using the peak-to-peak amplitude feature, while 14 minutes is needed for the peak PLV feature. These results show that the PLV of CAEPs can be used to find a clinically relevant hearing threshold estimate. Its potential stability in differing morphology may be an advantage in testing infants or cochlear implant users.

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Cortical auditory evoked potential time-frequency growth functions for fully objective hearing threshold estimation

Publication date: Available online 28 September 2018

Source: Hearing Research

Author(s): Darren Mao, Hamish Innes-Brown, Matthew A. Petoe, Yan T. Wong, Colette M. McKay

Abstract

Cortical auditory evoked potential (CAEPs) thresholds have been shown to correlate well with behaviourally determined hearing thresholds. Growth functions of CAEPs show promise as an alternative to single level detection for objective hearing threshold estimation; however, the accuracy and clinical relevance of this method is not well examined.

In this study, we used temporal and spectral CAEP features to generate feature growth functions. Spectral features may be more robust than traditional peak-picking methods where CAEP morphology is variable, such as in children or hearing device users. Behavioural hearing thresholds were obtained and CAEPs were recorded in response to a 1 kHz puretone from twenty adults with no hearing loss. Four features, peak-to-peak amplitude, root-mean-square, peak spectral power and peak phase-locking value (PLV) were extracted from the CAEPs. Functions relating each feature with stimulus level were used to calculate objective hearing threshold estimates. We assessed the performance of each feature by calculating the difference between the objective estimate and the behaviourally-determined threshold.

We compared the accuracy of the estimates using each feature and found that the peak PLV feature performed best, with a mean threshold error of 2.7 dB and standard deviation of 5.9 dB across subjects from behavioural threshold. We also examined the relation between recording time, data quality and threshold estimate errors, and found that on average for a single threshold, 12.7 minutes of recording was needed for a 95% confidence that the threshold estimate was within 20 dB of the behavioural threshold, using the peak-to-peak amplitude feature, while 14 minutes is needed for the peak PLV feature. These results show that the PLV of CAEPs can be used to find a clinically relevant hearing threshold estimate. Its potential stability in differing morphology may be an advantage in testing infants or cochlear implant users.

from #Audiology via ola Kala on Inoreader https://ift.tt/2OYbTEY
via IFTTT

Cortical auditory evoked potential time-frequency growth functions for fully objective hearing threshold estimation

Publication date: Available online 28 September 2018

Source: Hearing Research

Author(s): Darren Mao, Hamish Innes-Brown, Matthew A. Petoe, Yan T. Wong, Colette M. McKay

Abstract

Cortical auditory evoked potential (CAEPs) thresholds have been shown to correlate well with behaviourally determined hearing thresholds. Growth functions of CAEPs show promise as an alternative to single level detection for objective hearing threshold estimation; however, the accuracy and clinical relevance of this method is not well examined.

In this study, we used temporal and spectral CAEP features to generate feature growth functions. Spectral features may be more robust than traditional peak-picking methods where CAEP morphology is variable, such as in children or hearing device users. Behavioural hearing thresholds were obtained and CAEPs were recorded in response to a 1 kHz puretone from twenty adults with no hearing loss. Four features, peak-to-peak amplitude, root-mean-square, peak spectral power and peak phase-locking value (PLV) were extracted from the CAEPs. Functions relating each feature with stimulus level were used to calculate objective hearing threshold estimates. We assessed the performance of each feature by calculating the difference between the objective estimate and the behaviourally-determined threshold.

We compared the accuracy of the estimates using each feature and found that the peak PLV feature performed best, with a mean threshold error of 2.7 dB and standard deviation of 5.9 dB across subjects from behavioural threshold. We also examined the relation between recording time, data quality and threshold estimate errors, and found that on average for a single threshold, 12.7 minutes of recording was needed for a 95% confidence that the threshold estimate was within 20 dB of the behavioural threshold, using the peak-to-peak amplitude feature, while 14 minutes is needed for the peak PLV feature. These results show that the PLV of CAEPs can be used to find a clinically relevant hearing threshold estimate. Its potential stability in differing morphology may be an advantage in testing infants or cochlear implant users.

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Hyperacusis and disorders of sound intolerance

.


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Promotion and views on tinnitus self-help within United Kingdom national health service audiology departments

.


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Rotational vestibular assessment

.


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Speech intelligibility of virtual humans

.


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Longitudinal analysis of leisure noise exposure among adolescents with special focus on portable listening devices: the OHRKAN cohort study

.


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A directional remote-microphone for bimodal cochlear implant recipients

.


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Hearing and ear status of Pacific children aged 11 years living in New Zealand: the Pacific Islands families hearing study

.


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Prevalence and factors associated with tinnitus: data from adult residents in Guangdong province, South of China

.


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Assessment of speech recognition abilities in quiet and in noise: a comparison between self-administered home testing and testing in the clinic for adult cochlear implant users

.


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Assessing auditory nerve condition by tone decay in deaf subjects with a cochlear implant

.


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Hyperacusis and disorders of sound intolerance

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2zCMueZ
via IFTTT

Promotion and views on tinnitus self-help within United Kingdom national health service audiology departments

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2Qi97e5
via IFTTT

Rotational vestibular assessment

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2zCn5BQ
via IFTTT

Speech intelligibility of virtual humans

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2QenhfY
via IFTTT

Longitudinal analysis of leisure noise exposure among adolescents with special focus on portable listening devices: the OHRKAN cohort study

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2zBDkzh
via IFTTT

A directional remote-microphone for bimodal cochlear implant recipients

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2QeBdXy
via IFTTT

Hearing and ear status of Pacific children aged 11 years living in New Zealand: the Pacific Islands families hearing study

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2zCMN9y
via IFTTT

Prevalence and factors associated with tinnitus: data from adult residents in Guangdong province, South of China

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2QeB5Hy
via IFTTT

Assessment of speech recognition abilities in quiet and in noise: a comparison between self-administered home testing and testing in the clinic for adult cochlear implant users

.


from #Audiology via ola Kala on Inoreader https://ift.tt/2zCcWoU
via IFTTT

Assessing auditory nerve condition by tone decay in deaf subjects with a cochlear implant

.


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Editorial Board

Publication date: October 2018

Source: Gait & Posture, Volume 66

Author(s):

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Changes in the symmetry of external perturbations affect patterns of muscle activity during gait initiation

Publication date: Available online 27 September 2018

Source: Gait & Posture

Author(s): Yun-Ju Lee

Abstract

Background

Gait initiation is associated with changes in the steady state and experiencing an external perturbation during initiation of gait could further threaten balance stability.

Research question

The aim of the study was to investigate if changes in the symmetry of the perturbations affect patterns of muscle activity during gait initiation.

Methods

Eleven young health participants were instructed to stand on the force platform and wait for the instruction of taking a right step, left step or stand still while experiencing a pendulum perturbation applied to the back of both shoulders (symmetric), back of the right shoulder (asymmetric) or no perturbations. Bilateral electromyographic activity (EMG) of dorsal and ventral muscles, moments of the pendulum release and perturbation impact, center of pressure (COP) displacements and pelvic movements were recorded and analyzed before and after the onset of the perturbation.

Results

Taking the right/left step in presence of symmetric perturbation did not affect the temporal sequence of COP and pelvic movements. The onset of COP and pelvic movement occurred before the perturbation impact at the shoulder levels. The factors of step and perturbation did not significantly affect integrals of bilateral muscles at the pendulum release. After the pendulum release, ventral and dorsal EMG integrals of the trunk, thigh, and shank segments increased or decreased corresponding to the swing and stance leg. Changes in muscle activities were also associated with the symmetric or asymmetric perturbations before and after the perturbation impact.

Significance

The outcome of the study provides information about strategies used to coordinate the activity of muscles while body perturbations are induced during gait initiation.

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Introduction to the statistical guidance for a successful research paper

Publication date: Available online 27 September 2018

Source: Gait & Posture

Author(s): Thomas Dreher, Tishya Wren

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Editorial Board

Publication date: October 2018

Source: Gait & Posture, Volume 66

Author(s):

from #Audiology via ola Kala on Inoreader https://ift.tt/2zBDS8c
via IFTTT

Changes in the symmetry of external perturbations affect patterns of muscle activity during gait initiation

Publication date: Available online 27 September 2018

Source: Gait & Posture

Author(s): Yun-Ju Lee

Abstract

Background

Gait initiation is associated with changes in the steady state and experiencing an external perturbation during initiation of gait could further threaten balance stability.

Research question

The aim of the study was to investigate if changes in the symmetry of the perturbations affect patterns of muscle activity during gait initiation.

Methods

Eleven young health participants were instructed to stand on the force platform and wait for the instruction of taking a right step, left step or stand still while experiencing a pendulum perturbation applied to the back of both shoulders (symmetric), back of the right shoulder (asymmetric) or no perturbations. Bilateral electromyographic activity (EMG) of dorsal and ventral muscles, moments of the pendulum release and perturbation impact, center of pressure (COP) displacements and pelvic movements were recorded and analyzed before and after the onset of the perturbation.

Results

Taking the right/left step in presence of symmetric perturbation did not affect the temporal sequence of COP and pelvic movements. The onset of COP and pelvic movement occurred before the perturbation impact at the shoulder levels. The factors of step and perturbation did not significantly affect integrals of bilateral muscles at the pendulum release. After the pendulum release, ventral and dorsal EMG integrals of the trunk, thigh, and shank segments increased or decreased corresponding to the swing and stance leg. Changes in muscle activities were also associated with the symmetric or asymmetric perturbations before and after the perturbation impact.

Significance

The outcome of the study provides information about strategies used to coordinate the activity of muscles while body perturbations are induced during gait initiation.

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via IFTTT

Introduction to the statistical guidance for a successful research paper

Publication date: Available online 27 September 2018

Source: Gait & Posture

Author(s): Thomas Dreher, Tishya Wren

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