Where is the science in music?

Soundwave

I have taught a course on the physics of music several times. Most physics departments offer a course like this, and typically the teaching is assigned to someone who has some musical background. But musical enthusiasts who take such a course leave vaguely disappointed – for the same reason that the music background of the teacher is irrelevant for teaching the course. That is because these courses are really on the physics of sound: how sound propagates, how it reflects, how it is generated and filtered. And in fact the physics of sound, of musical acoustics, even that of musical instruments themselves has been understood for many years. Here is how you do it: solve linear equations with the right initial and boundary conditions and you’re done. The equations are those for gas flow; they’re a little messy, but they are well known. The key word here is linear; for those with a math background, that translates to “easy-peasy”. I’ve written about this before. (more…)

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