Evaluation of Hearing Protector Attenuation in the Field: A Case Study Using the F-MIRE Technique

This article presents a case study that employs the F-MIRE (Field Microphone in Real Ear) technique to evaluate the attenuation of Hearing Protectors Devices (HPD) used by workers exposed to occupational noise. The study aims to demonstrate the state-of-the-art application of the F-MIRE method in real working conditions, highlighting its ability to provide representative data on the effective noise attenuation achieved by users in the field. The study was conducted in an industrial environment, with direct measurements taken from workers during a representative portion of their work shifts. The F-MIRE technique allowed for identifying discrepancies between real-world field attenuation and laboratory-derived values. The results show that factors such as anthropometric differences, the fit of the HPD to the user, and worker behavior can influence the performance of HPDs. It is concluded that the F-MIRE technique is a valuable method for assessing the effectiveness of HPDs in the field, offering critical data to enhance hearing conservation programs and support managerial decision-making.