Turn on, turn off the appliance, low-frequency hum: Listen & Download Turn off the appliance,, Turn on .mp3 Error! Change your browser, please! ⇓ Download Shoots an electric arc indoors ⚠ Low frequency rumble ⚠ Small switch, toggle switch ⚠ Electric sparks ⚠ Switch ⚠ Electric transformer ⚠ Current, electricity, discharge ⚠ Button click ⚠ Electrical discharge surge ⚠ Small electric motor ⚠ Electric discharges, Tesla coil ⚠ Electric discharges, Jacob’s ladder ⚠ ★★★★★ HTML code: BB code: