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. 2018 May 30;12(3):034109. doi: 10.1063/1.5023729

FIG. 5.

FIG. 5.

Acoustic emissions of SonoVue® and polymeric cups exposed to 511 kHz ultrasound in a μLAR device, as detected by an externally coupled PVDF film sensor. The power spectral density is shown following background subtraction using the acoustic emissions of a control sample (no cavitation nuclei). The blue dashed lines indicate the harmonic frequencies. The red dashed lines indicate the ultra-harmonic frequencies. The peak rarefactional pressure (PRFP) of the ultrasound is indicated in the figure.