You’ll see a button on some mic preamps and other audio gear labeled Phase, Phase Reverse, Phase Invert, etc. This is really Polarity.
I can’t believe how often people get this wrong. Mix engineers without an *actual engineering* background I can excuse – they simply don’t know any better. What surprises and disappoints me, however, is when gear is labelled incorrectly. Seriously, this stuff is designed by *actual engineers* who should know better.
It’s like confusing frequency with pitch. For most people, the two terms are as good as interchangeable. In some contexts (such as designing synthesisers), the difference between frequency and pitch is the difference between pleasant music and a cacophonous mess.
Also, the linked article is pretty good. You know, science. It works.