Sonic generators

You are looking at the latest skyscraper to be erected in the downtown core, seemingly for the sole purpose of blotting out the last vestige of scenery remaining to you, when you notice that the building has these enormous dimples, several stories in diameter, recessed into the outer steel and glass walls.
Bored yet intrigued, you head inside and type the name of the building into a search engine to see if you can figure out what the architect could have been thinking when it was designed because it sure wasn't the stress level of the members of the window washers union.
It turns out that the design is a new concept in power generation which uses huge parabolic dishes to focus the sound from noisiest sections of the surrounding city to receiving stations on the rooftops of neighboring structures. You learn that the receivers use the frequency of this collected noise to vibrate thousands of thin copper rods protruding from a central globe at the receivers' core. An outer globes' inner surface is covered with powerful magnets and the rods oscillations back and forth across these magnets provides the electricity to run the buildings lighting, elevators and emergency systems.
Suddenly you know just what you're going to do with that satellite dish collecting cobwebs behind the garage.