So we basically use sound to trap a lightweight object in free space and we can update its position at very high update rates.
所以我们基本上使用声音将轻量级物体困在自由空间中，我们可以以非常高的更新率更新它的位置。
英语百科
Frame rate
Frame rate, also known as frame frequency, is the frequency (rate) at which an imaging device displays consecutive images called frames. The term applies equally to film and video cameras, computer graphics, and motion capture systems. Frame rate is expressed in frames per second (FPS).