For training I've had to use some non-free data, but there's also some free stuff around. The speech from the examples is from SQAM (https://tech.ebu.ch/publications/sqamcd) and I've also used a free speech database from McGill (http://www-mmsp.ece.mcgill.ca/Documents/Data/). Hopefully if a lot of people "donate their noise", I can make a good free noise database.