An underground car-park is the first point of call for many visitors to the inner-city. Stepping out of the car the visitor is enveloped by an array of inorganic sounds particular to this space: the electrical hum of vending machines, the roar of exhaust fans and car engines, the screech of tyres on painted surfaces all add to a distinctively exhausting tone. The bombardment of these sounds compounds the claustrophobic experience of being several levels underground. The effect can be quite disorienting.