The Structure of the Acoustic Guitar
[Experiment 1]Sound hole size
Performing a sound experiment
What effect does the size of the sound hole have on the sound? We compared the sound as we changed the size of the hole.
- Create a lidless wooden box.
- Create a lid from a urethane board.
- Use a circular cutter to cut duplicate holes, then glue to the wooden box.
- Attach offcuts and fasteners and install a string.
- Change the size of the hole and compare the sound of the string.
* As this was an experiment, the recorded pitches differed from the correct notes.
We used string 1 from a guitar. The larger the sound hole the louder the volume grew; conversely, the smaller the sound hole the quieter the volume became. However, smaller holes produced a mellower sound. With no hole you only hear the sound of the string itself, so the sound was weaker and quieter.