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Re: Chimes; Waves in Pipes, Rods, Bars, etc



This sounds interesting. Do you want to share your design calculations. I'm
not sure I would know how to match the fork frequency with the air column
frequency. Or is it a case of just keep cutting till you hit a resonance?
Regards Scott.

I wouild gladly share, had I actually calculated anything.

I just sawed and drilled and sawed.

The fork-like pitch can be lowered by increasing the
radius of the hole at the end of the slot or raised by
shortening the split ends or widening the slot.

The air pitch depends mostly on the length between side hole-slot
and the uncut end. It can be raised by shortening the unsplit end.

Test the metal pitch by blocking the end, and test the air pitch by
holding the tynes and blowing the other end. When both sound alike
the tone will be strong and long lasting.
I don't care what you use for a clapper.

The iron square tube is one inch outside with about .080 " wall.
I got it at a hardware store. Yesterday when I went to a hardware
store to see about other sizes and materials and couldn't find any.

I will keep trying.


Clarence Bennett
Oakland University
Rochester, Michigan
248 370 3418
http://www3.acs.oakland.edu/physics/staff_info/Bennett.htm