You may not pay much attention to your Apple EarPod headphones. You put them in your ears, crank up the tunes, then head to the gym or wherever. But if you've ever looked closely at the earbuds, you'd notice a few extra holes in the plastic. But what are they there for? They're not the microphone, that's located on the remote. The holes are actually there to let in air. This helps the speaker move more freely, creating deeper bass notes and better acoustics.
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