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Author Topic: Reduction of dB levels over distance  (Read 9565 times)

Offline Allen Higginson

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Reduction of dB levels over distance
« on: March 11, 2006, 02:17:56 AM »
Quick one - typically,does the dB levels drop by 6 dB every 2 metres or does it decrease by 6 dB with every "double" (ie - 1,2,4,8,16...etc.)?Had a bit of a brain stormer and haven't my references handy.
Cheers in advance
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Graeme

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Reduction of dB levels over distance
« Reply #1 on: March 11, 2006, 09:32:04 AM »
It drops 6 dba every time the distance from the sounder doubles.

2-6
3-9.2
4-12
5-13.9
6-15.5
7-16.9
8-18 etc
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Offline Allen Higginson

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Reduction of dB levels over distance
« Reply #2 on: March 11, 2006, 08:45:35 PM »
Ta to the Senior Member from the one having the Senior moment - that must be a keg I owe you by now!
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Graeme

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Reduction of dB levels over distance
« Reply #3 on: March 12, 2006, 10:46:03 AM »
No worries
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