Has anyone else experienced a strange high pitched buzzing/ roaring sound during meditation or Astral projection? If so, do you know what causes it?

Thanks in advance!
* I know I've asked this question before, I just wanted to see if I could get some more answers.

Also, to those who do not believe in this ability, I'd appreciate if you'd not answer my question.
Thanks for your time!

Yes. I have. I couldn't say for sure, what you're hearing, is such as that which I've heard, but if it is, you should seek an enlightened Guru to initiate you: I presume that you are a yogin, and are practicing yoga; if not, you should explore this wonderful, ancient science.

The kind of sound that I'm referring to, in yoga, is termed "anahata nada"(or nadam): these are Sanskrit words(am unable to type in their diacritical markings) = "sound without instrument".

The sound is coming from the mind; has nothing to do with ones physical hearing apparatus.

One of my two former Gurus, was a Hindu(a Brahman)by the name of Dr. Rammurti S. Mishra, M.D.: held multiple medical degrees(nero-surgeon, endocrinologist, psychiatrist – he collected degrees)and a Sanskrit scholar.

He authored three books on the subject of meta-physics. The first, "Fundamentals of Yoga" was on a best seller list for years, back in the 50-60's or there abouts. He died in 1993, but I think there is still an article about him on the Internet: just type in his name as above.

If you can check out "Fundamentals of Yoga" from the library, or possibly order it from Amazon.com, chapter #-28 entitled "Anahata Nadam-OM-Sphotam" is most informative about "transcendental" sound.

Good luck,

Alberich

P.S.-"Check Spelling" was unavailable when I wrote this; and I'm too tired to consult the dictionary. So, apologize for any misspellings.