Yes. His first "Ambient" release, "Music for Airports", back in 1978 was designed to induce a calming effect. It is very effective as I can testify since I've been using it for decades now to sleep.
The fact that it doesn't appear on the list by the researches cited in this article suggests a grave oversight.
Music for Airports was also the first in a series by Eno designed to take advantage of his "ambient speaker technigue" wherein you take a third speaker, in addition to the stereo pair, place it behind the listener, and connect it's two terminals to the two + (positive) terminals each channel on your amplifier.
Call it poor man's quadraphonic. It basically sends side information (or any signal not present on the other channel such as an instrument panned all the way to one side) to this third speaker.