Iphone 13 noise cancellation

Yes, it does. When you make a cellular call using your iPhone without accessories (just as a normal handset), the person you're calling will not understand you if there is noise around (cars driving, wind, etc.). This problem becomes especially bad when you use the speakerphone on cellular calls. Then pretty much every little noise around you beats your voice.

If you want good quality on cellular calls on any iPhone 13 model, you need AirPods or a similar bluetooth device with built-in microphone noise cancellation.

If you make calls on FaceTime, the absense of noise cancellation does not affect it. FaceTime has an own voice isolation feature.

The absence of noise cancellation does make the call quality considerably worse than before! Just about every call that I am on I am asked where I am since there is so much background noise while I am literally in a room with one other person that may be playing something on a device.

Absence of noise Cancellation for calls? I am not able to understand this. Please see this Apple Article. Adjust the audio settings on iPhone - Apple Support (IN)