Hi all,
I need to calculate the characteristic (or specific) impedance of a tube. Generally this tube has a varing cross-sectional area (diameter changes and it has tube is not cylidrical). However for a very simplified case, let's assume it is a perfect cylender terminated at a finite length. The walls and termination are not rigid so it will have interaction with acoustic pressure inside.
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Neil Stephen, Professor of Structural Mechanics at the University of Southampton and editorial board member of the International Journal of Solids and Structures has received the first Doak Prize for an outstanding journal paper On Energy Harvesting from Ambient Vibration (JSV, 293,1/2, pp 409-425).
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Hi,
I have a question and would be grateful if you could drop me some lines for it:
1- Is sound (or ultrasound) is ONLY generated when a structure is vibrating at its resonance frequency?
2- If the answer to the above question is YES, is sound (or ultrasound) generated at all resonance frequencies or just some of them depending on the amplitude of the vibration.
Thank you,
Babaei
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