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The history and development of ERA
The apparatus for ERA
11 other sections not shown
action potential active electrode adult amplifier amplitude artefacts audiometer auditory system auditory threshold averaged response basilar membrane Beagley BER waveform brainstem calibration CERA clinical cochlear nerve cochlear nucleus components contralateral cortex cortical responses Davis dB HL dB SL earphone ECochG eighth nerve electric response electrocochleography electrodes placed external acoustic meatus fibres frequency specific functions Gibson hearing loss identified imperative stimulus inferior colliculus inion inion response ipsilateral latency lateral lemniscus lesions masking mastoid Meniere's disorder method middle latency responses milliseconds monaural muscle neural neuro-otological noise obtained occur oscilloscope outer hair cells pathway patients peak position post-aural response post-auricular response pure tone recording reported signal slow response sonomotor responses sound pressure stimulus intensity stimulus repetition rate superior olivary complex switch technique tone bursts transtympanic tumours tympanic membrane usually vertex voltage wave waveform whilst WN AP workers young children