Physics of Guitar

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Acoustic Amplification

  1. The vibration of one or many strings cause the saddle of the bridge to vibrate.
  2. The vibration of the saddle causes the soundboard, or the face of the guitar body, to vibrate.
  3. The soundboard acts as a diaphragm, compressing air inside the body at the same frequency as the string. 
  4. Compression forces the air out along the path of least resistance, the soundhole, at a much louder volume than the string alone could have created.