Every 3dB over 85dB cuts the exposure time in half. The chart below shows the recommended allowable exposure times to continuous noise of different levels. As would being exposed to a sound of 150dB for any length of time, no matter how short. Experiencing a sound of 85dB over the period of 8 hours would cause damage to you hearing. Hearing damage depends on the sound intensity and also the length of exposure to the sound. A sound of 85dB or more would be best described by being a sound in which you would have to raise your voice to be heard above it. It is said that any sound above 85dB has the potential to cause hearing loss. We know that distance is a great way of reducing sound intensity. These readings are all taken while being close to the sound source.
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