If you ever get the chance, go see Cast in Bronze. He plays at my Festival, which is why I took it up.
The towers I've played in have the player on the second or third story, with the bells above the player and usually a steel floor separating them. The sound diffuses out into the air and covers a lot of acreage, high up.
Cast in Bronze, however, is very close to the ground - the big bells are probably about three feet up - so the sound goes directly into the dirt and up into your torso. It's hard to describe how sound, which is ordinarily audible, actually physically affects people in a tangible way.
The best way I can capture it is that you can feel the music inside you. It moves people.