“Baby boomers grew up with music blasting from dorm room turntables, car stereos, and arenas where the sound of a band at full throttle could rival the roar of a jet engine. Volume became an act of generational defiance. As rocker Ted Nugent put it: ‘If it’s too loud, you’re too old.'” It may come as a shock, but Nugent’s analysis was not entirely on the mark. And now, many biotech companiesare racing to help boomers get their hearing back.