The Three-Kilohertz Warning and the Timing of Hearing-Risk Decisions

Abstract

A central question for occupational hearing-risk assessment is not simply whether an output is accurate, but whether it survives scrutiny of prediction horizon. This literature-based conceptual analysis does not report a new experiment. The focal evidence concerns whether baseline hearing measurements can predict subsequent speech-frequency hearing loss in noise-exposed industrial workers. Prediction requires a defined starting point, an outcome window, and information available at that starting point. A variable associated with current disease may not predict its future course. Separate baseline status from incident outcomes. Test alternative follow-up windows and account explicitly for loss to observation and competing events. The proposed comparison concerns baseline audiometry, future speech-frequency loss, follow-up; it would test whether the specific failure scenario is detected without erasing legitimate uncertainty. The original source's limits remain material: Limited follow-up, a smaller longitudinal sample, occupational selection, and untested prospective clinical impact constrain deployment claims.