Carnegie Hall’s new Zankell Hall has the potential to change New York’s music scene. But there’s one rather large problem (as practically every critic who’s written about the place has mentioned): the rumble of subway noise. “The problem is doubly frustrating because Zankel’s intermediate size and clear acoustics favor music in the quiet to moderately loud dynamic ranges, and that’s when the noise is most audible, especially on the auditorium’s right side.”