Did you try another pair of ear tips? The new AirPods 3 seem to make a noise if they are not fitting correctly in your ear.
If this does not help, try to reset your AirPods, to rule out a software issue:
How to reset your AirPods and AirPods Pro - Apple Support
If this does not work, you should contact the official Apple Support by choosing the phone umber for your region form this Apple Support page:
Contact Apple Support - Apple Support
Or visit an Authorised Apple Service Provider or Apple Store next to your place:
Apple - Find Locations