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Resonance in an acoustic guitar

  • 03-05-2012 9:09pm
    #1
    GarIT
    Registered Users, Registered Users 2 Posts: 8,671 ✭✭✭


    I need to know how resonance occurs in an acoustic guitar. I completely understand resonance. What is it that happens in the guitar when you pluck the string, what part of the guitar is affected by resonance?


Comments

  • #2
    bogwalrus
    Registered Users, Registered Users 2 Posts: 1,454 ✭✭✭bogwalrus


    the wood resonates to a degree. But its more to do with amplification i would have thought. You pluck strings, sound goes into the hollow and bounces around in there with the wood resonating all the different frequencies making it louder.

    Look up resonance guitars, their the steel acoustic ones. the body is metal so they are much louder as metal resonates the sound better but less body so more thin sounding. Wood is much nicer=)

    Thats my guess anwyay


  • #3
    GarIT
    Registered Users, Registered Users 2 Posts: 8,671 ✭✭✭GarIT


    Its not that important that I would go researching, its just a sample exam question for the leaving cert that I couldn't answer. I was going to guess that it was the other strings but then they have different natural frequencies. The exact wording in the question is "Explain how resonance occurs in an acoustic guitar." It could also be just a bit of a dodgy question.


  • #4
    krd
    Banned (with Prison Access) Posts: 3,455 ✭✭✭krd


    GarIT wrote: »
    Its not that important that I would go researching, its just a sample exam question for the leaving cert that I couldn't answer. I was going to guess that it was the other strings but then they have different natural frequencies. The exact wording in the question is "Explain how resonance occurs in an acoustic guitar." It could also be just a bit of a dodgy question.

    The shape of the interior of the wood is cut to specific frequencies. When the string is struck - standing waves appear in side the body of the guitar.

    A violin is a better example. The wood is carefully cut to specific notes. so different parts of the body vibrate when those notes are played.

    It's an iffy question. The shape of a guitar's body is such, that when you hit a string, which is attached to the body, the body will vibrate at the frequency the string is tuned to.


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