Extended Wear Deep-Fitting Noise Dosimeter

This project involves the development of a deep-fitting in-ear personal noise dosimeter that can be worn for at least 72 hours without removal. The purpose of this device is to measure noise exposure deep in the ear canal, near the tympanic membrane. The dosimeter must be compatible with conventional hearing protection, i.e., earplugs and/or earmuffs can be worn with the device in-place without adversely affecting the hearing protector attenuation or the accuracy of the measurements. The dosimeter will accurately account for ear canal resonance, which varies significantly across the population. Since it will be worn continuously for 72 hours, it will account for occupational and recreational noise exposures. The noise dosimeter will comply with all requirements set forth in ANSI S1.25-1991(R2017).