Automated ABR Peak Labelling Using Matched Filters

An automated Auditory Brainstem Response (ABR) peak identification and labelling system is developed and evaluated. The system uses a set of matched filters and a rule base for on-line peak labelling. The matched filters are designed to reflect the spectral and biphasic characteristics of the ABR peaks. The rules are designed to identify ABR peaks based on the latencies and amplitudes of the peaks found in the matched filter output buffers. The system is capable of automatic generation of latency-intensity functions. The algorithm was tested using 168 ABRs from four adults, yielding only 2 incorrectly labelled recordings.

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