Measurement of static and dynamic radiation force on spheres

Shigao Chen, Glauber Silva, Randall Kinnick, Mostafa Fatemi, James F. Greenleaf

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


The acoustic radiation force on a sphere insonified by two collimated ultrasound beams with slightly different frequency is measured. The radiation force has a static component and a dynamic component which is oscillating at the difference frequency of the two ultrasound beams. For a sphere suspended with very thin thread in water, the static radiation force is estimated from the deflection of the sphere, which is measured by an alignment laser moved on a micro-platform. The dynamic radiation force is estimated from the vibration speed of the sphere measured with a laser vibrometer. Experimental results on three steel spheres of different radius show that the dynamic and static radiation force have very similar magnitudes: with a difference less than 6%.

Original languageEnglish (US)
Article numberU4-F-5
Pages (from-to)676-679
Number of pages4
JournalProceedings - IEEE Ultrasonics Symposium
StatePublished - Dec 1 2004
Event2004 IEEE Ultrasonics Symposium - Montreal, Que., Canada
Duration: Aug 23 2004Aug 27 2004

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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