Know the sound level around you, and how long you can stay safely. This app will tell you the approximate sound level pressure you are currently exposed to, and it will tell you how long you can stay at that level without risk of hearing loss. You can find inside more information about the decibel scale, the noise dose formula, attenuation standards, and more. This app was developed as a free companion for EarDial HiFi Earplugs - Invisible High Fidelity Hearing Protection, but it is useful ev