Low frequency rumble: Listen & Download Low frequency rumble .mp3 Error! Change your browser, please! ⇓ Download Low Frequency Electric Drone ⚠ Discharge, electricity, Current ⚠ Shoots an electric arc indoors ⚠ Switch ⚠ Electric transformer ⚠ Button click ⚠ Multichannel switch ⚠ Small switch, toggle switch ⚠ Electrical discharge surge ⚠ Wall switch ⚠ Low frequency rumble ⚠ Start up, shutdown,, Electronic energy ⚠ ★★★★★