We report on parametric amplification of the dynamic radiation force produced by a bichromatic acoustic beam in a fluid as the difference frequency is increased. We develop a theory for dynamic radiation force taking into account the nonlinearity the fluid. An experiment was designed to measure this force on an acrylic sphere of $\unit[3.2]{mm}$ diameter immersed in a fluid. Results yielded a force of up to $\unit[4]{N}$ in water and $\unit[22]{N}$ in alcohol. They are in good agreement with the proposed theory, and cannot be explained by previous theories.
展开▼
机译：我们报告了随着差频增加，流体中双色声束产生的动态辐射力的参数放大。我们开发了一种考虑流体的非线性的动态辐射力理论。设计了一个实验，以测量浸入流体中的直径为\\ [3.2] {mm} $的丙烯酸球体上的力。结果在水中产生的力高达$ \ unit [4] {N} $，在酒精中产生的力高达$ \ unit [22] {N} $。它们与所提出的理论非常吻合，不能用先前的理论来解释。
展开▼
