Back in November last year, I went on a photo walk through Digbeth, Birmingham led by photographer Pete Ashton and sound artist Sam Underwood. By using my ears, a stethoscope, various recorders, and contact, hydrophonic and omnidirectional microphones, Sam encouraged me to slow down and listen to the hidden sounds of the city. When you think of the constant sounds of a metropolis, you might think of road traffic, trains, police sirens or the murky hubbub of conversation.