This report explores the consequences of acoustic overexposures on hearing in noisy
environments for two macaque monkeys trained to perform a reaction time detection task
using a Go/No-Go lever release paradigm. Behavioral and non-invasive physiological
assessments were obtained before and after narrowband noise exposure. Physiological
measurements showed elevated auditory brainstem response (ABR) thresholds and absent
distortion product otoacoustic emissions (DPOAEs) post-exposure relative to pre-exposure …