Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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


    User Avatar
    Science Advisor
    Homework Helper

    What, precisely, is "intensity?" Look it up in your textbook. Understanding the definition will lead you to the answer!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook