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Info of Acoustic Guitar Works

The sound box, or sound board on a guitar is found at the top and it works to make the sounds louder and stronger. If someone just plucked the string without this sound box, the sound wouldn’t move the air much and thus the note wouldn’t be loud. The soundboard increases the area of the vibrations and can move the sound that much better than the string alone since it is larger and flat. This impacts the whole guitar’s energy transfer and the notes can be heard that much louder.

The guitar’s body is of course hollow, and this also works to increase the energy transmission of each note. The air that is in the body of the guitar resonates with the vibrations as each string is strummed. At low frequencies the body increases or decreases the volume of the sound depending on how the air in the body moves in or out of phase with the strings. In phase with the strings and you get an increase of 3 decibels, out of phase with the strings and it will decrease by 3 decibels.

This air inside the body of the guitar works with the outside air through that all important sound hole. This results in air pushing air which in turn makes those notes all the more resilient. Since the guitar has several sound coupling modes– string to soundboard, soundboard to air, inside air to outside air– you get different tones from different guitars.