I just did this today and it worked well.......for a bit lol.

The girls were running around and getting screechy. After numerous "inside voices please", "that's an outside game", "girls, I don't like that game anymore" I was fed up. I have radio/music stations on my tv with just audio, no picture so I turned it to "the spa" channel which plays calming/relaxing music. This quieted them down!!! I will try it again and see if it works like it did today