How can sound make a sound louder?

Answer 1

As a rule,the higher the strings are off the fingerbord,the louder the sound. You are going to be limited of course,because the higher the strings,the harder to play. Heavier gauge strings are louder than light gauge.That's the reason that bluegrass musicians use dreadnaught size Guitars,Usually Martin,with a high action and heavy strings. This makes for a lot of volume,but a killer on the fingers. This is the only way I know of to make an acoustic guitar louder short of shaving down the braces and/or top,which should only be done by a skilled luthier and can be quite expensive.