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This calculator is designed to give the amount of change,
attenuation or gain, in decibels, you can expect with a change in
receiver distance. Enter the data and click on calculate. As an
example of anticipated data, if you were standing 10 feet from a
noise source, and were to move to a location 100 feet away from that
same sound source, you would expect to see a calculated drop in
level of about 20dB. Sound that is projected from a given source
drops in level at about 6dB with each doubling of the initial
distance. Temperature and surrounding conditions, natural and
man-made, all have an effect. If you start at 50 feet from the
source and move to 100 feet from the source, there will be about a
6dB drop in level. If you move from 500 feet to 1000 feet, you will
also have roughly a 6dB drop in level. You may use feet, meters or
any designation of measure so long as it is consistent.
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