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Published on: June 8, 2017
Neonatal hearing screening: a combined click evoked and tone burst otoacoustic emission approach
Vicky W Zhang1, Bradley McPherson, Bao-Xuan Shi
1Centre for Communication Disorders, The University of Hong Kong, Hong Kong SAR, China. weizhang@hkusua.hku.hk
Objective:
This study evaluated an alternative transient evoked otoacoustic emissions method for screening hearing in newborn babies that may reduce the referral rate of initial screening.
Methods:
A total of 1,033 neonates (2,066 ears) from two hospitals were recruited. Subjects had their hearing screened in both ears using a combined approach-both click evoked OAEs (CEOAEs) and 1kHz tone burst evoked OAEs (TBOAEs).
Results:
1kHz TBOAEs were more robust than CEOAEs in terms of emission response level and signal-to-noise ratio (SNR) at both 1 and 1.5kHz frequency bands. The prevalence rate for CEOAE and TBOAE responses in these two frequency bands was significantly different. The combined protocol significantly reduced the referral rate-by almost 2 percentage points for first time screening.
Conclusions:
The implementation of a combined 1kHz TBOAE/CEOAE screening protocol is a feasible and effective way to reduce referral rates, and hence false positive rates, in neonatal hearing screening programs.
