|
KMID : 0858620060100020105
|
|
Korean Journal of Audiology
2006 Volume.10 No. 2 p.105 ~ p.111
|
|
|
The Validity of Auditory Steady-State Response as Frequency-Specific Threshold Test in Infant-Toddlers
|
|
Park Su-Kyoung
Kim Bong-Jik
Hur Dong-Gu
Lee Kang-Jin
Lee Jun-Ho
Oh Seung-Ha
Kim Chong-Sun
Chang Sun-O
|
|
|
Abstract
|
|
|
Objectives: The aim of this study was to evaluate the accuracy of auditory steady-state response (ASSR) in prediction of frequency-specific thresholds of infant-toddlers.
Subjects and Methods : From 2003 through 2006, 32 infant-toddlers (64 ear) ranging in age from 1 to 68 months with or without hearing impairment were included in this study, who have performed behavioral audiometry (BA) or auditory brainstem response (ABR) with ASSR. Behavioral hearing thresholds and ASSRs to carrier frequencies of 0.5, 1, 2 and 3 kHz were obtained. Thresholds of ABRs and ASSRs were recorded from 1 and 3 kHz. Estimated audiograms of the ASSR were compared with ABR or BA results. Differences and correlations between the ASSR and other tests were determined.
Results: In the 1, 3 kHz, strong correlation were found between ASSR-based threshold estimations and ABR-based threshold estimation irrespective of ABR stimuli. Between ASSR and BA, there were also strong correlation in carrier frequencies of 0.5, 1, 2 and 3 kHz. In 10 ears (1 kHz) and 12 ears (3 kHz) in which an ABR tracing was absent at the maximum level 100 dB nHL, 8 ears (1 kHz：80%) and 7 ears (3 kHz：58%) were measurable ASSR thresholds with an average threshold of 103 dB HL at 1 kHz and 106 dB HL at 3 kHz. Average threshold difference between ASSR and ABR was about 15 dB HL. Between ASSR and BA average threshold difference was about 10-18 dB HL, which slightly decreased in high frequencies. In subjects with normal hearing of ABR (under 25 dB nHL) ASSR-based threshold estimation scattered too much.
Conclusion: This studies illustrate that ASSR can accurately predict the behavioral audiogram and ABR in infant-toddlers. We also consider the possibility of wide range estimations in normal hearing.
|
|
|
KEYWORD
|
|
|
Infant-toddlers, Auditory steady-state response, Hearing threshold
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|