warpus
Sommerswerd asked me to change this
Here's what my sound dude friend says:
best chance at noise reduction/absorption in an 'open air' bar is sound absorption panelling, but it can be done as broken sections of walls staggered around the property so it's not right up against the bar, and still gives you a chance at seeing scenery. Noise Cancellation (electronically) won't work because it cannot anticipate/account for reflected sound (which is why there are noise cancelling headphones but not speakers)