Laboratory experiment: Listen & Download Laboratory experiment .mp3 Error! Change your browser, please! ⇓ Download High-frequency squeak, hum ⚠ Old bike ⚠ In the cab, Noise inside the tractor ⚠ Body fall in leaves ⚠ Chewbacca’s voice ⚠ Air dissection ⚠ Spinning spinning, Fishing ⚠ Airport Luggage Transport Belt ⚠ Military, pioneer horn ⚠ Rope fall ⚠ Blow into the microphone ⚠ Removing bad words ⚠ ★★★★★