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- - Quick maths question (https://www.scoobynet.com/non-scooby-related-4/253514-quick-maths-question.html)

markr1963

23 September 2003 03:53 PM

'Noise levels reduce 6Db ( a quartering of the initial level) with each doubling of distance'

So something producing 99Db at 1m from the source will reduce to 93Db at 2m; 87Db at 4m etc, etc.

How do I find out at what distance the noise will be 90Db and also what is the noise at 3m?

I can plot the graph in Excel and I'm pretty sure it's a log function but I can't figure out the formula.

Ta muchly
Mark

WRX Wannabe

23 September 2003 04:09 PM

2.5miles = 90Db

Scooby96

23 September 2003 04:19 PM

miles or metres?!!

markr1963

23 September 2003 04:34 PM

Scooby96
It's metres

WRX W
What's the formula to work this out?

markr1963

23 September 2003 05:05 PM

Cheers Jason, just the job

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