University, hallway, large student crowd, talking, Basel, Switzerland

Office, hallway, busy, people walking by, talking, doors slamming, Basel, Switzerland

Hallway, condo apartments, residential, elevator, person walking on stairs, tiles, door, New York City, USA

University, hallway, people walking by, talking, wooden door slamming, New York City, USA

Primary school, hallway, some pupils and teachers, Graz, Austria

University, hallway, distant conversation, Ibiza, Spain

Hallway, humming of elevator machine room, distant mini crowd

Hallway, museum, distant tv, distant voices, ventilation