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toxicsugar22

  • 5 years ago

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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  1. heisenberg
    • 5 years ago
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    I think you need to combine the sound intensity level formula and the inverse square law for this guy.

  2. toxicsugar22
    • 5 years ago
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    WILL YOU HELP ME DO THAT

  3. anonymous
    • 5 years ago
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    why inverse square law?

  4. toxicsugar22
    • 5 years ago
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    CAN YOU HELP ME

  5. toxicsugar22
    • 5 years ago
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    PLEASE

  6. anonymous
    • 5 years ago
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    here http://www.engineeringtoolbox.com/sound-intensity-d_712.html

  7. toxicsugar22
    • 5 years ago
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    YEAH THANKS BUT i DONT KNOW HOW TO START IT

  8. toxicsugar22
    • 5 years ago
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    WILL YOU HELP ME STAT=RT THIS PROBLEM PLEASE IM SO STRESSED

  9. anonymous
    • 5 years ago
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    please read it carefully

  10. toxicsugar22
    • 5 years ago
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    I DID

  11. toxicsugar22
    • 5 years ago
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    PLEASE i WILL BE GRATEFULL TO YOU

  12. toxicsugar22
    • 5 years ago
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    WILL YOU GO STEP BY STEP WITH ME TO OLVE THIS

  13. heisenberg
    • 5 years ago
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    I will try to help, but I am not too sure. But please, take caps lock off.

  14. toxicsugar22
    • 5 years ago
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    ok

  15. heisenberg
    • 5 years ago
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    \[Intensity = \frac{Power}{4*\pi*r^2}\]

  16. heisenberg
    • 5 years ago
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    sorry, not 'power' but 'sound wave pressure'

  17. toxicsugar22
    • 5 years ago
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    ok

  18. heisenberg
    • 5 years ago
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    to find P, use this: \[P = P_r * 10^\frac{SPL}{20}\] P_r is the reference point

  19. heisenberg
    • 5 years ago
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    SPL = decibel level

  20. toxicsugar22
    • 5 years ago
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    ok

  21. toxicsugar22
    • 5 years ago
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    will you help further

  22. toxicsugar22
    • 5 years ago
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    so i understand

  23. toxicsugar22
    • 5 years ago
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    fr next time

  24. heisenberg
    • 5 years ago
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    What don't you understand?

  25. toxicsugar22
    • 5 years ago
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    calculaed the intensity of the concert and the pain

  26. toxicsugar22
    • 5 years ago
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    can you help

  27. heisenberg
    • 5 years ago
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    yes you can use those two formulas. First calculate the pressure, then you can use that to calculate the intensity.

  28. toxicsugar22
    • 5 years ago
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    yes can u supervise me

  29. toxicsugar22
    • 5 years ago
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    help

  30. toxicsugar22
    • 5 years ago
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    so I plug in 120 for SLP

  31. heisenberg
    • 5 years ago
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    Yes

  32. heisenberg
    • 5 years ago
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    according to wikipedia, P_ref is often regarded as 20 µPa in air, so I would use that for P_r

  33. toxicsugar22
    • 5 years ago
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    SO IT IS P=20*10(120/20)

  34. toxicsugar22
    • 5 years ago
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    IS IT RIGHT

  35. heisenberg
    • 5 years ago
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    yes that'll give you the pressure. then you need to find the intensity from a distance.

  36. heisenberg
    • 5 years ago
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    glad the caps are back.

  37. toxicsugar22
    • 5 years ago
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    so i did 20*10 which is 1200

  38. toxicsugar22
    • 5 years ago
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    then i did 120/20 which is 6

  39. heisenberg
    • 5 years ago
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    no, there is an exponent there: \[20*10^\frac{120}{20}\]

  40. heisenberg
    • 5 years ago
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    = 20 000 000

  41. toxicsugar22
    • 5 years ago
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    i did that and i DID iT WRONG

  42. toxicsugar22
    • 5 years ago
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    like i have this website from school and it checks my work and I did it wrong

  43. toxicsugar22
    • 5 years ago
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    can u guide me

  44. toxicsugar22
    • 5 years ago
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    again

  45. toxicsugar22
    • 5 years ago
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    srry to bother you

  46. toxicsugar22
    • 5 years ago
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    heisenberg you there

  47. heisenberg
    • 5 years ago
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    what did you get? I get = 636.619772

  48. toxicsugar22
    • 5 years ago
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    i got that also

  49. toxicsugar22
    • 5 years ago
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    it not right

  50. toxicsugar22
    • 5 years ago
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    tAT IS NOT RIGHT HEISENBERG

  51. toxicsugar22
    • 5 years ago
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    please help again

  52. toxicsugar22
    • 5 years ago
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    nm

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