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Acoustics Homework Question! Please HELP

  1. Mar 31, 2009 #1
    Acoustics Homework Question! Please HELP!!!!

    We're doing some problems in my acoustics class...and I absolutely don't get this one! HELP PLEASE!

    For radiation from a sound board of area AREA, vibrating with amplitude A at frequency f we find power for P radiated:

    P=(2.8x10^5 newton/m^2)((AREA)A^2f^2)/(c))

    **Sorry about that formula...i don't know how else to write it on here***
    a)If the amplitude and frequency are kept the same, but the frequency of the sound board is tripled, what happens to the sound power radiated?

    b) If the amplitude and area are kept the same, but the frequency of the sound board is doubled, what happens to the sound power radiated?

    c) If you triple the amplitude of the vibration of the sound board (changing nothing else), how does the sound power output change?

    d)How does this formula explain the large size of "woofer" loudspeakers?



    PLEASE HELP ME!!!!!!!!!!!
     
  2. jcsd
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