Neh --> it means: I'm hungry.
Owh --> it means: I'm sleepy.
Heh --> it mean discomfort now.
Eairh -->it means:I have lower gas (upset stomach)
Eh --> it means:I need to burp (need to be burped)
This comes from Pricila Dunston an austrilian lady that has a photographic hearing memory and picked up on her own baby's communication and realized that other babies were making the same noises for the same problems right before they started to cry. I have noticed that Moxy makes these noises but it's hard to distinguish at first. This morning he was making the noises very clearly.