General Question

johnshurig's avatar

At a distance of 10 meters form a point source, the intensity level is measured to be 70 dB. At what distance form the source well the intensity be 40 dB? How do you solve this?

Asked by johnshurig (1points) April 24th, 2012

I have heard you can solve sound volume and distance problems two ways 10log and 20log. Please explain.

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2 Answers

Charles's avatar

Going on memory here….3db is half the intensity. The intensity is usually inversely proportional to r squared. The rest is math, so 70–40 is 30 or ten halves.

Charles (4826points)“Great Answer” (0points) Flag as…
Nullo's avatar

Db is a logarithm scale, isn’t it?

Nullo (22028points)“Great Answer” (0points) Flag as…

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