The technology works by focusing sound into a narrowbeam, just like light.
这项技术的原理是将声音压缩成类似于光的窄束。
2
For this effect, we're going to use a very soft, narrowbeam, so go under the Style pop-up menu at the top of the dialog (this is where the presets are) and choose Flashlight.
为了这个效果我们需要用到一个很窄的柔化光束。所以在对话框顶部的样式选择菜单中点选手电筒效果。
3
In other words, ultrasound essentially travels in a very narrowbeam — this makes it great for focusing the waves toward a desired area, but not for actual aural comprehension.