Main functions
Voice capture: It’s used to make sure you’re heard during regular phone calls. It’s located at the bottom so it’s as close to your mouth as possible.
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Noise reduction: Many modern phones have two of these holes (one on the bottom, the other on the top). They work together to filter out ambient noise – the bottom one captures your voice, and the top one analyzes the ambient noise, which then “resets” the system in software.Common mistakes
