Abstract: Acoustic streaming near bubbles in an external standing-wave sound field has been an interesting researeh topic for decades, It was relatively difficult to visualize the acoustic streaming pattern experimentally especially for small bubbles due to the instability of tbe bubbles and difficulties associated with the optical technique, Using Albunex" spheres (a contrast agent for ultrasonic imaging), a specially designed microscope devise and a video peak store technique, several acoustic streaming patterns around a single and a pair of AlbunexQ spheres of tens micrometer radius in a 160 kHz ultrasonic standing wave field have been captured. Spatial peak pressure amplitude of the standing wave was estimated to be in the order of 0,5 MPa by using optical interferometer. me acoustic streaming velocity was in the range of 50-100~m/s
