Noise Pollution

Last evening between meetings I stopped for some tea and down time at a fast food place. At first I noticed the music and then came the droning of equipment. Not sure what the source was but I'm thinking air conditioning unit. The drone was constant and extremely agonizing. After about an hour I had to leave or leave later with a huge headache. The next meeting was an after hours event so the timing was not intolerable. Why with all the technology and putting computers into every thing why can we not find, buy and install quicker equipment. I was concerned about the people that work in that environment daily. Noise, it all adds up and yes, noise pollution is a very real thing.