I made a heavy duty noisey buzzer that clangs and rattles and sounds like electricity arcing too.
I was fortunate enough to buy a brand new Wagner power stripper for $3.00 in a Goodwill Store.
This tool runs off of 110 volts and a small steel end moves back and forth Very quickly, it only moves maybe 1/4 inch? It is for scraping paint.
I cut a small but thick piece of steel and hung it on a metal band on a frame work infront of this device.
All of this was installed inside a strong metal box so as to contain any possible flying parts or pieces from if coming loose at speed.
I once had a cheap upright "broom" vaccuum cleaner that was given too me because of the noises it made.
After using this suspended from my ceiling for many years one day it quit making such scary sounds...It had finally ground up all of the shelled corn that had been trapped inside of it!