At a concert By the Who in 1976, the sound level 50 meters from the stag registered 120 decibles. The treshold of pain for the human ear is 90 decibles. Calculate the sound intensity of the Who concert and the sound intenisity of the treshold of pain

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At a concert By the Who in 1976, the sound level 50 meters from the stag registered 120 decibles. The treshold of pain for the human ear is 90 decibles. Calculate the sound intensity of the Who concert and the sound intenisity of the treshold of pain

Mathematics
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I think you need to combine the sound intensity level formula and the inverse square law for this guy.
WILL YOU HELP ME DO THAT
why inverse square law?

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Other answers:

CAN YOU HELP ME
PLEASE
here http://www.engineeringtoolbox.com/sound-intensity-d_712.html
YEAH THANKS BUT i DONT KNOW HOW TO START IT
WILL YOU HELP ME STAT=RT THIS PROBLEM PLEASE IM SO STRESSED
please read it carefully
I DID
PLEASE i WILL BE GRATEFULL TO YOU
WILL YOU GO STEP BY STEP WITH ME TO OLVE THIS
I will try to help, but I am not too sure. But please, take caps lock off.
ok
\[Intensity = \frac{Power}{4*\pi*r^2}\]
sorry, not 'power' but 'sound wave pressure'
ok
to find P, use this: \[P = P_r * 10^\frac{SPL}{20}\] P_r is the reference point
SPL = decibel level
ok
will you help further
so i understand
fr next time
What don't you understand?
calculaed the intensity of the concert and the pain
can you help
yes you can use those two formulas. First calculate the pressure, then you can use that to calculate the intensity.
yes can u supervise me
help
so I plug in 120 for SLP
Yes
according to wikipedia, P_ref is often regarded as 20 ┬ÁPa in air, so I would use that for P_r
SO IT IS P=20*10(120/20)
IS IT RIGHT
yes that'll give you the pressure. then you need to find the intensity from a distance.
glad the caps are back.
so i did 20*10 which is 1200
then i did 120/20 which is 6
no, there is an exponent there: \[20*10^\frac{120}{20}\]
= 20 000 000
i did that and i DID iT WRONG
like i have this website from school and it checks my work and I did it wrong
can u guide me
again
srry to bother you
heisenberg you there
what did you get? I get = 636.619772
i got that also
it not right
tAT IS NOT RIGHT HEISENBERG
please help again
nm

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