Black Box Explains...Flexible microphones.
A headset featuring a flexible, swing-away microphone boom is easy to adjust—all you need to do is bend the boom until the microphone is in the correct position. Plus, you... more/see it nowcan easily swing the microphone out of your way if you wish to take a sip of coffee or soda while you’re on the phone. collapse
Black Box Explains...Microphone positioning.
Proper microphone positioning is especially important to take advantage of noise canceling microphones, which reject background noise.
For optimum performance, position the microphone one finger width away from your lower lip.