Abstract
This study investigated normally-hearing adult subjects to establish whether the 400 Hz Period Evoked Potential (PEP) can be used to predict Loudness Discomfort Level (LDL). Parameter-intensity functions were obtained using the response measures (400 Hz components) of amplitude, phase, magnitude squared coherence (MSC) and phase coherence (PC). The best predictor of the subjective LDL was found to be the gradient of the individual's amplitude-intensity function for significant (MSC > 0.264 and/or PC > 0.525) responses only. In this case 82% are predicted within 10 dB and there is a maximum error of 15 dB.