A quick "search" on-line revealed several companies with products intended for venues that produce sound, noise, music beyond the limits imposed by local ordinances. Unfortunately, none of them reveal the cost or specifics about effectiveness... without the researcher (me) jumping through hoops or visiting "links."

I have a sneaky feeling that the cost would make the owners of such venues (unless they feature Don Mason or Gary Diamond) decide to provide other forms of entertainment. I could be wrong but I just don't have time for further research.

----Dave