Actually my father in-law used to design loudspeaker systems that canceled certain frequencies put out by power plants at different heights along exhaust stacks
I assume the trick is knowing or calculating how far you are from the source your timing to block, and having speakers that are broadcasting away from the source.
Actually my father in-law used to design loudspeaker systems that canceled certain frequencies put out by power plants at different heights along exhaust stacks
I assume the trick is knowing or calculating how far you are from the source your timing to block, and having speakers that are broadcasting away from the source.