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Sound Intensity Level Question

  1. Nov 4, 2004 #1

    A loudspeaker supported well above the ground on a post is supplied with
    8.5 W of electrical power. The speaker is able to convert
    5.6% of that into sound power. (That number is known as
    the speaker's efficiency.) If we assume that sound
    radiates equally in all directions, what is the sound intensity at a
    distance of 7.1 m?

    Please help? :shy:
  2. jcsd
  3. Nov 5, 2004 #2


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    Science Advisor
    Homework Helper

    What, precisely, is "intensity?" Look it up in your textbook. Understanding the definition will lead you to the answer!
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