Noticeable background noise on calls
Causes of background noise
Loud places
Surrounding noise can vary a lot. The easiest noise to attenuate is the noise inside a car, since this is a static, low frequency noise, not interfering with speech too much.
Airport noise, people talking, and office noise is much harder to remove without sacrificing speech intelligibility, so callers may hear noise from your end if you are in such an environment.
