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Auditory Brain Stem Responses Recorded With Uncushioned Earphones
American Journal of Audiology
|December 15, 2015
Summary
Removing earphone cushions for auditory brain stem response (ABR) testing in infants may not significantly impact results, despite sound level changes. This finding is crucial for optimizing infant hearing assessments.
Area of Science:
- Audiology
- Neuroscience
- Infant Hearing Assessment
Background:
- Cushioned earphones are standard for pure-tone audiometry.
- Cushions may pose challenges for auditory brain stem response (ABR) testing in infants due to size and ear canal collapse risk.
Purpose of the Study:
- To investigate the impact of using an uncushioned earphone during ABR testing.
- To assess signal attenuation and ABR waveform changes without an earphone cushion.
Main Methods:
- Adult participants were tested using ABR with and without standard earphone cushions.
- Probe-tube microphone measurements were used to quantify sound delivery to the ear canal.
Main Results:
- Removing the earphone cushion caused significant sound signal reduction below 1 kHz.
- The click-elicited ABR showed minimal changes when the earphone cushion was removed.
Conclusions:
- Earphone cushions may not be essential for click-evoked ABR testing.
- The findings suggest that uncushioned earphones could be a viable option for ABR in infants, potentially simplifying the procedure.
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