The only con is that it can only 'see' 3cm deep.
My application would be for CPUs. You would pulsate heat towards the heatsink using a tone generate on the underside of the socket.
A. I really don't have a strong mathematical grasp of the physics.
B. I imagine the frequency of the waves might damage the silicone lattice.
C. Other issues I don't have the knowledge to even consider.
This is just an idea that came to as I was walking home from work. I'm sure it's absolute hogwash.
In other words, the more materials you could test at different temperatures, with different types of vibration going through them, the more you'd gain an understanding of the phenomena... perhaps there's a new theory or discovery in there... I can see the research paper or theory: "Heat dissipation via pulsation in different materials at different frequencies".
Of course, you might fail... but you'd (have to!) learn a lot of things from diverse areas of physics (and probably math too) in the process!
That would be a win, no matter what.
People thought the motion was due to radiation pressure at first but the force due to light is probably a few orders of magnitudes off. Turns out it was heat causing the motion.
Which further links to:
The photo-acoustic effect is studied in school to some degree and is pretty well known. However the microwave auditory effect is lesser known and incredibly interesting.
"The photoacoustic effect or optoacoustic effect is the formation of sound waves following light absorption in a material sample. In order to obtain this effect the light intensity must vary, either periodically (modulated light) or as a single flash (pulsed light).[page needed] The photoacoustic effect is quantified by measuring the formed sound (pressure changes) with appropriate detectors, such as microphones or piezoelectric sensors."
Laser sharp imaging. Unlimited soundstage. Fast as light bass.