A Dosimeter measures a person’s cumulative noise exposure over time. It was designed to help prevent hearing loss by allowing a user to monitor the amount of noise that they have been exposed to, which over time can correlate to hearing damage. In addition to the Dose calculation, we have added a separate SPL Meter to this screen. This is not required as a part of the specification, and the SPL Meter settings do not change the way that the Dose is computed. Although this SPL Meter is not required by the regulations, we have included it to provide another useful for metric for alerting the user to exposure to loud sounds. Think of it like running an SPL Meter and a Dosimeter at the same time.