Development of a Voice-based Method for Objective Occlusion Effect Measurement Abstract Hearing protectors are the most commonly used short-term hearing protection solution in the workplace. However, the ear canal occlusion effect causes a change in the wearer’s perception of his or her own voice and amplification of physiological noise, particularly when ear plugs are worn. Hearing protectors can thus be uncomfortable to wear, causing them to be used less often. There are methods for quantifying occlusion effect in human subjects, but there is no consensus on the most effective method. In addition, the existing methods are not standardized. In an earlier project entitled Development of tools and methods for better evaluating and improving workers’ personal hearing protection (0099-7630), a method based on microphone measurements and vocal effort was developed. This method seems to give good results, and is a first step towards developing a method for objective measurement of occlusion effect. The purpose of this research project is to suggest a methodology for objective and reliable measurement of occlusion effect based on microphone measurements and to identify precise indicators for quantifying this effect. In the longer term, we hope to create a measuring device that could be used to quantify occlusion effect in the workplace and provide data for awareness and training purposes. Produced Under this Project Scientific Reports Development of a Voice-based Method for Objective Occlusion Effect Measurement Research Report: R-1118 Simplified Articles Vers plus de confort dans les oreilles Volume 34, n0 2 Scientific Publications Investigating the effect of excitation type and sound attenuation on the occlusion effect induced by hearing protection devicesSaint-Gaudens H., Hugues Nélisse, Doutres O., Franck SgardSource : (2019). Communication présentée à 2019 NHCA Annual Conference, Grapevine, TX.Comparison of different excitations to assess the objective occlusion effect measured on human subjectsSaint-Gaudens H., Hugues Nélisse, Franck Sgard, Laville F., Doutres O.Source : (2019). Proceedings of the 26th International Congress on Sound and Vibration, Auburn, AL : International Institute of Acoustics & Vibration.A transfer matrix model of the IEC 60318-4 ear simulator: Application to the simulation of earplug insertion lossLuan Y., Franck Sgard, Benacchio S., Hugues Nélisse, Doutres O.Source : (2019). Acta Acustica united with Acustica, 105(6), 1258-1268. doi: 10.3813/AAA.919403Towards a practical methodology for assessment of the objective occlusion effect induced by earplugsSaint-Gaudens H., Hugues Nélisse, Franck Sgard, Doutres O.Source : (2022). Journal of the Acoustical Society of America, 151(6), 4086-4100. doi: 10.1121/10.0011696 Other Project(s) You May be Interested in Development of tools and methods for better evaluating and improving workers’ personal hearing protectionDevelopment of a method for measuring effective intra-aural noise exposure for use in the workplaceDesign of Artificial Ears for the Purpose of Studying Noise Mitigation and the Occlusion Effect of Ear Plugs Using MRI ImagingOccupational Injuries to the Rotator Cuff: Development of Content for a Practical Guide to Optimize Workers’ Care and to Foster a Return to Work Additional Information Type: Project Number: 2017-0032 Status: Completed Year of completion: 2020 Research Field: Mechanical and Physical Risk Prevention Team: Hugues Nélisse (IRSST)Olivier Doutres (École de technologie supérieure)Franck Sgard (IRSST)