How do you turn off iPhone screen recording outside noise/audio?

Why does my iPhone screen recording record outside noise (external noise). I hate it because it gets in the way whenever I would like to record something and send it somebody. It always ends up recording the audio from the video and outside audio like me breathing our nearby noises like a car passion etc. Please answer this question thank you.

Either that's the best it can do

OR

you need to change a setting that will shut off the mic.

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