As of Feb. 1, 2013, the WCB has a new, non-retroactive policy on how work-related hearing-loss is determined. Medical Officers will apply current best occupational medical knowledge when reviewing a claimant’s history and audiogram to see if the hearing loss is compatible with a work related, noise-induced injury. Workers in high noise industries should have audiograms done during employment and again at or within five years of retirement. (Learn how to implement a hearing conservation program in your workplace.)