We use two different types... This first one we use at home... We have three, one in each bedroom. Perfect sound levels and last a long time... We've had these about three years with no issues... http://www.amazon.com/Marpac-Dohm-DS-Speed-Sound-Conditioner/dp/B000KUHFGM
This one we bought for our camper... It's a little smaller... Has 6 different "sounds" and can run off batteries (when we dry camp)... The volume on this guy can really be cranked up too (campers are not very sound proof)... http://www.amazon.com/Marsona-DS-60...qid=1392555905&sr=1-30&keywords=Sound+machine.... Sent from my iPad using DISBoards
Awesome! Thanks so much for this information!