Baby Driver

Throughout the film, Baby often has music playing in his ears to mask the tinnitus (ringing in his ear) he suffers from. However, most ear specialists advise those with tinnitus to avoid loud noise, which includes listening to music through earphones; by doing so Baby may be causing further damage to his hearing. He is also involved in armed robberies, which is hardly a healthy remedy either. In one briefing sequence he nevertheless appears to catch the instructions despite the music making it appear that he can't hear. This suggests he doesn't necessarily listen at very high volumes, but instead keeps the music only loud enough to mask the persistent ringing.