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A comparison of multiple frequency A...

Watkins, Valerie Ann.

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A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners./
Author:	Watkins, Valerie Ann.
Description:	63 p.
Notes:	Adviser: Roger A. Ruth.
Contained By:	Dissertation Abstracts International67-12B.
Subject:	Health Sciences, Audiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3244701

A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners.
Watkins, Valerie Ann.

A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners. - 63 p.

Adviser: Roger A. Ruth.

Thesis (Ph.D.)--James Madison University, 2006.

The newest technique in the field of clinical objective audiometry is the multiple frequency auditory steady-state response (ASSR). ASSRs are periodic electrical responses of the brain evoked by continuous tonal stimuli. Modulated tones stimulate certain areas of the basilar membrane allowing for frequency-specific estimation of hearing thresholds and the use of continuous stimuli allows for higher maximum stimulation levels enabling better determination of severe versus profound hearing loss. Current widely used methods for objectively estimating the audiogram, including the auditory brainstem response (ABR) and otoacoustic emissions (OAEs) are useful clinically, but both have limitations in the amount of information they can provide a clinician. Recently the ASSR has emerged as an attractive method of predicting actual thresholds. It has also been shown to more closely predict the audiogram in the cases of severe to profound hearing loss. The multiple frequency ASSR to date is somewhat limited in regards to clinical validation; however, reports appear to be increasing in this area of study.Subjects--Topical Terms:

1018138
Health Sciences, Audiology.

A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners.
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035 $a (UMI)AAI3244701
035 $a AAI3244701
040 $a UMI $c UMI
100 1 $a Watkins, Valerie Ann. $3 1266029
245 1 2 $a A comparison of multiple frequency ASSR and behavioral thresholds when simulating hearing loss in normal hearing listeners.
300 $a 63 p.
500 $a Adviser: Roger A. Ruth.
500 $a Source: Dissertation Abstracts International, Volume: 67-12, Section: B, page: 6982.
502 $a Thesis (Ph.D.)--James Madison University, 2006.
520 $a The newest technique in the field of clinical objective audiometry is the multiple frequency auditory steady-state response (ASSR). ASSRs are periodic electrical responses of the brain evoked by continuous tonal stimuli. Modulated tones stimulate certain areas of the basilar membrane allowing for frequency-specific estimation of hearing thresholds and the use of continuous stimuli allows for higher maximum stimulation levels enabling better determination of severe versus profound hearing loss. Current widely used methods for objectively estimating the audiogram, including the auditory brainstem response (ABR) and otoacoustic emissions (OAEs) are useful clinically, but both have limitations in the amount of information they can provide a clinician. Recently the ASSR has emerged as an attractive method of predicting actual thresholds. It has also been shown to more closely predict the audiogram in the cases of severe to profound hearing loss. The multiple frequency ASSR to date is somewhat limited in regards to clinical validation; however, reports appear to be increasing in this area of study.
520 $a This study considers the accuracy of using steady-state responses evoked by multiple simultaneous stimuli with carrier frequencies at 500, 1000, 2000, and 4000 Hz when simulating hearing loss in young normal hearing listeners. Flat and sloping audiometric configurations were examined both behaviorally and using the MASTER system. The hypothesis was that there would be no significant differences shown between thresholds obtained with pure tone audiometry and those obtained using the multiple frequency ASSR test method. Through statistical analyses the null hypothesis was determined to be true. Regression analyses revealed significant correlation between thresholds across all test conditions.
520 $a The ASSR can be used effectively to estimate the audiogram and the objective detection of responses makes it an attractive clinical test. The results of the current study suggest that using simulated hearing losses in normal hearing listeners may be as accurate as using subjects with actual hearing losses with regards to estimating behavioral hearing thresholds from MASTER thresholds.
590 $a School code: 1357.
650 4 $a Health Sciences, Audiology. $3 1018138
690 $a 0300
710 2 $a James Madison University. $3 1023976
773 0 $t Dissertation Abstracts International $g 67-12B.
790 $a 1357
790 1 0 $a Ruth, Roger A., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3244701