Lots of older brake drums had a long coil spring resembling the one used to close a screen door wrapped tightly around the drum. It was there to dampen out the harmonics caused by vibrations when the brakes were applied. It's a low tech solution, but it works pretty well.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!