The Effects of Different Reference Methods on Decision-Making Implications of Auditory Brainstem Response

Area of Science:

• Neuroscience
• Audiology
• Biomedical Engineering

Background:

• Hearing loss is a significant global public health concern.
• Auditory Brainstem Response (ABR) is a key clinical tool for hearing loss detection.
• The choice of reference electrode significantly impacts ABR waveform quality and diagnostic accuracy.

Purpose of the Study:

• To systematically evaluate the effect of different reference methods on ABR waveform quality.
• To compare the Reference Electrode Standardization Technique (REST) against conventional Average Reference (AR) and Mean Mastoid (MM) methods.
• To determine the optimal reference method for improving ABR-based hearing loss diagnosis.

Main Methods:

• ABR signals were acquired using an EEG electrode cap array with click stimuli.
• The study compared ABR waveforms from six midline channels, focusing on the Cz channel.
• The Reference Electrode Standardization Technique (REST) was evaluated against Average Reference (AR) and Mean Mastoid (MM) methods.

Main Results:

• The Cz channel demonstrated the best ABR waveform morphology.
• REST and MM methods yielded ABR waveforms with significantly improved amplitude and morphology compared to AR.
• REST and MM methods did not alter ABR latencies, preserving diagnostic timing information.

Conclusions:

• The Reference Electrode Standardization Technique (REST) and Mean Mastoid (MM) methods enhance ABR waveform quality for more accurate clinical diagnosis of hearing loss.
• These improved methods offer potential for physicians to achieve higher diagnostic accuracy in ABR testing.
• This research provides a theoretical foundation for reference method selection in electroencephalogram acquisition for public health applications.