Om is the Mantra for the Third Eye Chakra. I have been playing this a lot while I sit at the computer. I have also been playing when I sleep too. Not loudly but at a lower volume. I have found I am sleeping better.
I find when I relax and focus on the Om, I can feel it in my heart Chakra and Third Eye Chakra. Its a pleasant sensation. Its very relaxing and soothing.
Also my cat, Crawley, has not been begging so much to go outside. I am glad he is chilling out!