I Didn't Hear My Blood.

'I didn't hear my blood. I sowve head that before, and i was li i didn't hear,' he says. 'All my sort of volley ringing ever so slight.' He tries out an annicot chamber at Uce's linguistic department in London. The room has a metal grid over the baffles to keep people from bumping into each other. But when you turn your head away it can be difficult to hear what they're saying.