I don’t think this is unusual - mine does it too, louder than some of my watches but not as loudly as my Rolex does. Weirdly, the Selitta does seem to have a similar ‘ringing’ sound though!
The only thing I did notice was that the first 1 or 2 times I wound it, it was so smooth I wondered if there was a problem. Now it’s settled in a bit the winding click is much more distinct and positive. Also, I’m getting a consistent +2 seconds every 24 hours or so, which is impressive.