Free Noise Maker 

All sounds will auto repeat. MIX AND MATCH 
Consistent background noise may help to counteract harmful effects of other noise during sleep allowing you to remain asleep and fall asleep faster. Also some people find that background noise helps to distract them from anxious or intrusive thoughts and prepares the mind for sleep. 
White Noise
Pink Noise
Rain Storm 
Ringing bowl 
Calm Piano 
BA BA Black Sheep