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As we mentioned earlier, the newest iMac features not one, but two microphones.
Dual microphone technology has been utilized in mobile devices for years to cut out background noise during phone calls. Now, the same idea is being applied here to improve sound quality during intimate FaceTime chats with your mother.
It's not often that we see the microphone(s) and webcam for a computer disconnected from each other. That modularity means positive points towards repairability.