Thank you.  It's okay to applaud the laws of physics, but essentially what's happening here --  -- is the energy from the sound via the air and gas molecules is influencing the combustion properties of propane, creating a visible waveform, and we can see the alternating regions of compression and rarefaction that we call frequency, and the height is showing us amplitude.
谢谢.  我能理解你们为这一物理定律的鼓掌喝彩， 但是实际发生的是  通过空气和气体分子产生的声音的能量 在影响丙烷的燃烧性质 因而创造出一个可视的波段 而且我们可以看到不同地区的波段 以及空气稀薄的地方我们把它叫频率 高度告诉我们的是振幅