This fat tissue has some rather fascinating acoustical properties.
这个脂肪组织具有相当独特的声学特征。
Let's talk about the other end of the acoustical spectrum, sound that is too high for humans to hear—ultrasound.
让我们来谈谈声谱的另一端,人类听不到的声音——超声波。
So musical instruments evolved in ways that optimize their acoustical properties, how the instrument vibrates and sends those vibration through the air to our eardrums.