Theory 10/Micro to Milli/Ultrasound contrast
Bubbles Answer Their Resonance
The claim
Microbubble response to ultrasound is set by the ratio of driving period to bubble resonance period, so equal pressure produces very different oscillation across bubble sizes.
01Mechanism
A bubble responds maximally near resonance; the ratio determines whether the driving is in phase with the bubble's natural oscillation.
02Prediction
Response should peak near the ratio.
03Refutation
Response tracking pressure alone would remove resonance.