2:34
Underground city ambience, low hum, drone. (1).
1:41
Underground city ambience, heavy ventilation, overhead traffic (3).
2:00
Underground city ambience, heavy ventilation, overhead traffic (2).
2:00
Underground city ambience, heavy ventilation, overhead traffic (1).
1:49
Underground city ambience, low airy rumble, distant yelling voices. (4).
2:30
Underground city ambience, low airy rumble, distant yelling voices. (3).
2:30
Underground city ambience, low airy rumble, distant yelling voices. (2).
2:30
Underground city ambience, low airy rumble, distant yelling voices. (1).
3:05
City rumble ambience, large city, distant highway, wind in trees. (2).
2:28
City rumble ambience, large city, distant highway, wind in trees. (1).
3:20
City rumble ambience, large city, distant trainyard. (3).
2:30
City rumble ambience, large city, distant trainyard. (2).
2:30
City rumble ambience, large city, distant trainyard. (1).
2:47
City rumble ambience, heavy fans (3).
2:55
City rumble ambience, heavy fans (2).
2:28
City rumble ambience, heavy fans (1).
3:28
City rumble ambience - large city, fire bell in background (2).
2:59
City rumble ambience - large city, fire bell in background (1).
3:00
City rumble ambience, large city, different traffic. (3).
2:29
City rumble ambience, large city, different traffic. (2).