The Journal of the Acoustical Society of America · 1975 · 81 citations · 0 references
Natural SciencesMaterials SciencePhysicsAcousticsUltrasonographyUltrasoundAcoustic MeasurementAcoustic RadiationAcoustic SensingPhysical AcousticsUltrasonicsUltrasound PhysicsAcoustic Characterization Of MaterialsAcoustic Intensity MeasurementAcoustic Material CharacterizationAcoustic Radiation ForceExperimental CharacterizationExperimental StudiesSubject ClassificationUltrasonic Acoustics
The study explores the benefits of using fused silica spheres as targets in the acoustic radiation force method for determining ultrasonic intensity. Experimental measurements of the radiation force function for fused silica spheres in water over ka = 2–24 were performed, and the necessary conditions for achieving high accuracy were discussed. The measured radiation force function values agree within 2 % of theoretical predictions, enabling ultrasonic intensity determination and acoustic probe calibration with uncertainties below 2 % up to ka = 24, where stainless steel spheres lose accuracy. Subject classification codes: 25.45, 30.80, 35.80, 85.22.
The advantages of using fused silica spheres as the target in the radiation force method of acoustic intensity determination are considered. Experimental determination of the radiation force function, for fused silica spheres in water in the range of ka 2–24, was carried out. The experimentally obtained values of the radiation force function agree within 2% of those calculated from the theory of the radiation force on solid elastic spheres. This makes possible determination of ultrasonic intensity and calibration of acoustic probes with uncertainties <2% to values of ka=24, where the accuracy of the radiation force method with stainless steel spheres becomes reduced. The experimental conditions necessary for the realization of this accuracy are discussed. Subject Classification; 25.45; 30.80; 35.80; 85.22.