This is the sound of the green tractors on campus. This sound happened when the tractor was in reverse. The sound was loud and harsh as the engine of the vehicle sounded agressive.
Recording of passing bnsf freight train at denair train platform in denair, california. First the warning bells from the crossing guard then the train.
The sound of a monster in pain. I made it by recording myself doing a weird sound, paulstretching it, changing pitch, and then applying an echo effect on audacity.