Effects of Fretboard Arches

Anyone interested in the effects of various kinds and sizes of arches on dulcimer sound really need to visit Richard Troughear's latest explorations of dulcimer acoustics, over on ED:

The Effects of Arched or Continuous (Hollow) Fretboards on Top-plate Vibration

http://www.everythingdulcimer.com/discuss/viewtopic.php?f=5&t=18370&start=204

For those who don't know, Richard, down on OZ, is perhaps the only person in the world who is scientifically, quantitatively, delving into the science of dulcimer acoustics. Over the past couple years he has made some fascinating discoveries about how our beloved instruments 'make a joyful noise'.