Can you describe this noise?. Noise is not necessarily an indication that something is wrong. The sound you may hear is like a puff of air coming from the back of the throat, or "kha, kha," the sound of the baby exhaling after a swallow. If you hear that noise, it is a reliable indicator that the baby is swallowing.
If this persist, you might consider seeing a doctor
If this persist, you might consider seeing a doctor