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Homework Help: Speakers sound level at a certain point.

  1. Oct 17, 2003 #1
    Nevermind, I was able to solve it.
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    Two small speakers emit spherical sound waves of different frequencies. Speaker A has an output of 1.00 mW and speaker B has an output of 1.50 mW. Determine the sound level (in decibels) at point C if a) only speaker A emits sound, b)only speaker B emits sound, c) both speakers emit sound.
    The attachment has the distances and arrangement of the speakers and the point c.
    Any help is much appreciated, thanks!
     

    Attached Files:

    Last edited by a moderator: Oct 19, 2003
  2. jcsd
  3. Oct 21, 2003 #2

    HallsofIvy

    User Avatar
    Science Advisor

    The "1.00 Mw" and "1.5 Mw" tell you the strength. Like anything else that expands "spherically", sound obeys an inverse square law.
    The intensity of the sound is S/r2 where S is the strength of the sound and r is the distance from the point to the speaker. You will have to calculate that for each speaker and then add.
     
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