Quote:
Originally Posted by Silly Moustache
I'd like to read some feedback from luthiers as to why some loud guitars don't project and vice versa.
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Not a luthier, don't think I will ever call myself one. But I recently made a guitar with both the top and the back made of softwood. It has a live back and seems to vibrate much more than if it were a heavier hardwood (which makes sense). A fair of sound comes off the back and playing it gives you a lot of feedback but with a drop in projection and sound output in front of the guitar.
Another variable is the vibration pattern of the top. In the higher frequencies portions of the top vibrate in phase and out of phase with each other. If the areas are the same they can cancel themselves out giving less sound. A different pattern might create more sound area that does not cancel and if the area is large compared to the wavelength of the frequency the sound beams out from the top.