The study is going to determine whether the noise attenuation attained with the use of earplugs can be improved by teaching the proper insertion of earplugs to users and comparison of the effect of this training with using an ear plug with higher than needed NRR (Noise reduction rate).

This study is looking at the best way to teach workers how to correctly use earplugs to protect their hearing in noisy workplaces. Wearing earplugs incorrectly is surprisingly common, which means workers do not get the full protection they need. Researchers want to compare whether hands-on training in proper earplug insertion works better than simply providing workers with a higher-rated earplug. You may be eligible if: - You are a worker who has been referred to the clinic for a pre-employment evaluation You may NOT be eligible if: - You have previously used earplugs in noisy environments - You already have conductive or sensorineural hearing loss on your baseline hearing test Talk to your doctor about whether this trial might be right for you.