Electric vibrator. Small electric motor hum and buzz.
Small electric massage machine. Turned on and off.
Quiet buzzing from a cell phone, soft vibration
Blubbering sound from a male. Fingers vibrating against lips.
Loud impact of wood debris hitting a plastic surface bouncing and vibrating.
Toy truck plastic vibrations
Thin tin or metal, hollow rattle.
Vibrating massager switch on low speed vibration and switch off
Metal road sign shake and vibrate. Dull rattle.