Gauss,
You can download these two programs that will be of the utmost help in determining resonance. Both are freeware and both work very well.
You can even run them at the same time. Visual Analyzer will show the precise resonant frequency and harmonics of a tube via the spectrum analyzer /FFT function as well as with the frequency meter. You will need a mic and a soundcard. Thats it. Works great.
You can find the exact resonant frequency with Visual analyzer. You can then program that frequency into the Chime program. Then "ping" the tube with chime and hear it resonate sympathetically. You can keep VA running a see all that is happening in the spectrum analyzer. The attached inage file is a snapshot of a one of my crystal wine glasses resonating after being "pinged"
http://www.hitsquad.com/smm/programs/VA/
http://www.gdp-research.com.au/soft_1.htm
thx goey , I will investigate what is known as''sound'' with some new modern equipment on the low budget tho, since there is alternating Q charge from those triplen tubes from inner to outer , the middle tube is in the best condition possible to start oscillating .
If it oscillates , it will create changing ''water pressure'' aka ''sound'' . This will also correspond to maximum ''physical movement'' .
Because thats what sound is really , an electrical frequency being converted to moving a speaker wich changes air pressure and your ear piking those up , all the same ...