A low power ultrasonic energy is possible to be measured by measuring the force of ultrasound pressure. The plate in water absorbs the ultrasound energy and changes his weight.
Large thickness steel materials with coarse grains like austenetic steel have a great attenuation coefficient. Otherwise, Thin steel or aluminium materials are not absorbing materials of ultrasound.
Thanks for answer. Is the rubber good ultrasound absorber ? Can be suitable large thickness sandwich comprises of rubber/steel too ?
Rubber materials have a great absorption coefficient so it is a very good ultrasound absorber. Rubber/steel composite may be more absorber, it depends of kind of steel.
The lack of professional equipment for ultrasound power measuring (50 kHz; up to 10 W) forces me to make an good absorber which can be capable to take the ultrasonic energy during the measuring the "weight" change of the absorber in wather. I'll try with rubber and combination steel/ rubber.. .
Tiny gas bubbles are good adsorbers for ultrasound, think about materials containing tiny bubbles like styrofoam or neoprene
Dear Branislav, I am not sure about that, but some where I was reading discussion that absorption can by changed with ideal reflection. Then weight relation with acoustic power will have other coefficient. Maybe this crazy option is other way of solution?
- Of course, that is very good opinion, because the absorber stricken by ultrasound could oscillates harmonics, heat etc. I am convinced that the experiment with different materials will show interesting occurrences. An aluminium/ steel plate is one more solution.
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