Here is the deal, the SPL formula will tell me what dB a sound will be at once it reaches a certain distance, but I need something a little different. The SPL forumla is:
(SPL2 = SPL1 + 20log[d1/d2]) where 'd'=distance
Well, I need to know how to manipulate this formula so that it will tell me the DISTANCE at which a sound reaches a certain dB.
For example, let's say I have the original distance that the sound was measured at, for our purposes we will say that it was 90 dB at a distance of 20 feet. Without a bunch of trial and error, how can I tell what distance the sound will be 20 dB at?
Thank you!
2007-11-24
19:49:54
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2 answers
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asked by
Anonymous
in
Physics