In this audio, the familiar hum of a restroom hand dryer is heard. The sound is associated with the modern conveniences found in toilets and bathrooms. It's a common fixture in the facilities of the UPF-CS13 campus. The dryer's robust and continuous airflow signifies cleanliness, drying hands efficiently after washing. The noise it produces is a blend of a powerful motor's whirr, combined with the rush of warm air. It's a mechanical lullaby that echoes through the tiled confines of the restroom, a testament to technological advancement in everyday life. The UPF-CS13 campus, where this recording has been taken, is known for its commitment to providing comfort and convenience for its students, staff, and visitors, the hand dryer being one of the many amenities available. The sound is a routine part of visits to the restroom, a symbol of hygiene and cleanliness in public facilities.