Comparison of two cortical measures of binaural hearing acuity.
Won So, Spencer B Smith
PMID 33345686WHAT IT FOUND
The IPM-FR brainwave test takes about three times less time than the ACC test to detect small phase differences in hearing.
Neither test predicted patient outcomes yet, but IPM-FR is faster for measuring sensitivity to subtle changes.
Key findings
01The IPM-FR method requires significantly less time to detect neural responses to small interaural phase differences compared to the ACC method.
02When comparing the growth of response amplitudes across different phase differences, the two methods showed similar input-output characteristics after normalisation.
03The ACC method is more suitable if the goal is to understand how auditory spatial information is organised in the brain, due to its directional nature.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study included only ten participants, all of whom were young adults with normal hearing, so results may not apply to older adults or those with hearing loss. The ACC test parameters were chosen to minimise recording time, which may have made it less sensitive than it could be under optimal conditions. The study did not compare these brainwave measures to behavioural tests of hearing in real-world listening situations.
Declared interests
No potential conflict of interest was reported by the authors.
The easy way to misread this
Do not assume these tests are ready for clinical use. The study was performed on ten people with normal hearing and did not demonstrate that either test predicts how well a patient hears in noisy environments.