NEH - Hungry.
OWH - Sleepy.
HEH - Discomfort.
EAIR - Gas (Lower digestive issues).
EH - Burp (Upper digestive issues).

Sounds babies make just before wailing based on “gut” reflexes, as seen on Oprah in Dec 2006. In the interest of investigative journalism I have decided to test the hypothesis. I’ll let you know when I find an appropriate test subject.