Sound Pressure?

Question

How far do you need to go from a sound source to reduce the sound pressure level to 82 dB, if the sound pressure level is 106 dB at 1 ft?

Answer 1

For every doubling of the distance from the noise source, the sound pressure levels - Lp, will be reduced by 6 decibels.

See the following website:
http://www.engineeringtoolbox.com/abatement-distance-source-d_723.html