ChatterBank0 min ago
fog signal
4 Answers
How many decibels is the fog signal at a lighthouse? I was once at portland bill and it was the loudest noise i have ever heard!
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For more on marking an answer as the "Best Answer", please visit our FAQ.Do not know exactly, but in excess of 100dB...
http://www.diniel.digitalred.com/album/displayimage.php?album=4&pos=11
I should think, looking at this list, it is probably somewhere around 140dB
dB Sound
0 threshold of hearing
10 pin dropping at 10 m
20 soft whisper
30 library
40 quiet conversation
50 normal conversation
60 a busy office
70 vacuum cleaner
80 inside a small car
90 lawn mower
100 large orchestra
110 rock music
120 boom stereo in car
130 earphones up loud/ jet plane
140 air raid siren
150 military rifle