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Sound Waves

  1. Nov 29, 2009 #1
    1. The problem statement, all variables and given/known data
    The intensity of the sound from a certain source is measured by two observers located at different positions along a line from the source. The observers are located on the same side of the source and are separated by 77.7 m. The observer that is closest to the source hears the sound with an intensity of 60.8 dB. The intensity of the sound heard by the more distant observer is 58.9 dB.

    What is the distance from the source to the closest observer?



    2. Relevant equations
    We were given no equations but a classmate came up with the equation r1=77.7/(10^((B1-B2)/20)-1). I believe this comes from Beta=(10dB)log(base10)(I/I(0))


    3. The attempt at a solution
    I have just fooled around with these numbers and equations, usually getting numbers are seven hundred
     
  2. jcsd
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