High-frequency squeak, hum: Listen & Download High-frequency squeak, hum .mp3 Error! Change your browser, please! ⇓ Download Unlock the bike lock ⚠ Sand bag ⚠ Energy shot ⚠ Knocking, The noise of the elevator ⚠ Close, Suitcase, cover open ⚠ Falling, breaking wooden object ⚠ Tinder duster surface ⚠ Sine wave (975Hz) ⚠ Room noise ⚠ The rumble and wave of the lightsaber ⚠ Wheeled Supermarket Cart ⚠ In the cab, Noise inside the tractor ⚠ ★★★★★