Why does my AirPods Pro charging case make sounds?

The charging case of my Airpods Pro (1, 7E93) can produce sounds when a little movement is happening. It is really loud and annoyingly repetitive. I wanted to turn off that function but there is no opportunity to turn it off because “Enable Charging Case Sounds” is not available to be changed. It is settled as a default that there must be this function.

[Re-Titled by Moderator]