Fridge motor running, old and rattling
Big machine motor noise with a metallic clank
mid tone fluttery metallic engine noise
Small fridge motor, constant run, synth
Fast metallic whirring whoosh by.
Starting a small gas motor
Washing machine on rinse cycle with water sloshing and running and whirr of motor with drum rotating
120cc motorcycle, passing by, slow, relaxed, soft
1982 Mazda RX-7. Starts in distance, approaches, stops, revs, tire squeals away, idle.
Thick high pitch surging multi tonal long panned throbbing zaps