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This calculator is designed to give the total amount of decibels you
can expect with a secondary sound source added to a primary sound
source. Enter the data and click on calculate. Because decibels are
logarithmic units and can't be added like other numbers, total
combined output is not easily determined. As an example of
anticipated data, if you were combining a 50 decibel level to
another 50 decibel level, the result would be about 53 decibels
rather than a total of the two. The greater the deviance between the
two levels, the smaller the amplification addition. In certain
cases, a really wide deviance can actually cause attenuation rather
than amplification. Also, temperature and surrounding conditions,
natural and man-made, all have an effect on the total sound output.
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