That mug-tapping demonstration in the "Doublets or warble in bells" page [0] is neat! I'll be looking for an opportunity to show that to someone, ask why they t

That mug-tapping demonstration in the "Doublets or warble in bells" page [0] is neat! I'll be looking for an opportunity to show that to someone, ask why they think it happens, explain pedantically, and yell "Science!" [0] https://www.hibberts.co.uk/doublets-or-warble-in-bells/ https://www.hibberts.co.uk/doublets-or-warble-in-bells/