RobertB
Well-known member
So.....the chambered body....
The concept here was a Waveguide (nicely done, adouglas). The maze you see, in theory, is to focus the vibrations of the body (mainly at the bridge), and amplify them through the folded pathway to where a sound hold could be. This controls the resonant frequencies of the body. On top of all of this, we are also trying to control the weight and balance of the instrument.
We are working on versions 2 and 3 of this concept, as well as other styles of chambers to compare and contrast the sonic benefits.
There are many variables when prototyping such materials and geometry, but with every proto, we come closer to what gives the instrument the highest highs, the lowest lows, and the "middliest" mids!![]()
Something I just noticed while looking at the photo again, after reading Drew's post. If it's right to assume that the sound hole would likely be placed over the portion of the channel/waveguide that's on the lower left of the photo, then there are several discontinuous portions of the channel in that area, so you can potentially "tap" the channel at all those points that are below the sound hole - not just at the end of it. Maybe that's not the case/intent - just a thought.
If so, though, that's an interesting difference between sound waveguides and electromagnetic waveguides, which I've worked with in satellite transmission/antenna systems. Another difference is that in those applications, the waveguide doesn't amplify the signal - it just channels/guides the signal between stages of the chain in hollow metal "tubes". They do sometimes act as high pass filters, though.
Hope this isn't running the topic into the ground. It's just interesting stuff.