When sound slows down bubbles

We report experimental observations that a bubble rising in water in the presence of a sound field is significantly slowed down, even at moderate acoustic pressures. We measure the mean rise velocity of bubbles under various acoustic forcings and show this effect occurs if the noise spectrum matches or overlaps bubble resonance. We render surface oscillations and translational movements of bubbles using high speed video imaging and thereby identify Faraday waves on the bubble wall as the cause for the velocity reduction. The associated mechanisms are discussed in terms of induced forces.