A few months ago, I lost the foam covers on my earphones (standard iPod earbuds). I didn’t worry about it too much at the time; they sound fine without them.
A month ago, the left ear in one set of earphones died. I didn’t notice exactly when it happened; I chalked it up to kinking the wires, or something, and didn’t worry too much: I had extras.
While I was jogging today, the left ear in another set died; I don’t think I was doing anything in particular at the time, other than sweating.
So is the point of those foam covers to absorb sweat, so it doesn’t get into the earphones proper and screw things up? Or is my recent experience just a coincidence, and there’s another reason?
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