Ears can be exposed to 80 decibels for up to 8 hours. 3 more decibels double the amount of acoustic energy, and therefore halve the exposure time: 83 dB for 4 hours of exposure, 86 dB for 2 hours of exposure... When you exceed the recommended exposure time, you risk hearing damage such as hearing loss or tinnitus. With our calculator below, calculate your daily exposure time to noise without and with decilo custom fit hearing protection.