Recently I've started chanting during meditation. After a little practice my throat vibrations can hit my brain. If its the right pitch I feel a strong tingling sensation in the center of my brain that can expand and reach throughout my mind and body. This is having amazing effects on my meditation and lucid dreaming.

Given the location where the vibrating starts, and the seemingly psychedelic effects of this practice, I'm guessing the sound vibrations are stimulating the pineal gland to release hormones.

For me this is starting to seem to be an invaluable tool, and I bet it could be reproduced technologically with speakers and such. Anyone else have experience with vibrational chanting?