Rudy, asking in true curiosity: why?
In all honesty, I see people listening to music everywhere I go. It's on their laptops, ipods, hi-fi systems, it's in elevators, in their cars, in the stores where they shop, they hear music of one kind or another while on their exercise equipment, while jogging, doing chores, when they goto church etc. I come into a dojo where Ray Charles is being played but soon, and well before another student shows up, the music is turned off. It is a white environment and it is silent--like a math lab. To my mind, the absence of music in dojos is remarkable that's all. I guess I might have asked, Why is this space, the dojo, so different from most other spaces--acoustically that is?