Chapter Five: Wave Motions and Sound
You might think that Mach 1 (speed of sound in air) is pretty fast. It is—if you're comparing it to how fast you can drive your car. But did you know that speed of sound through steel is 17 times faster?
Also, did you know that your ears are non-linear? You don't perceive loudness on a linear scale. Why not? Surprise! It's about the energy.
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