Try and include the time as best you can, Pitch, Intensity, Duration, etc. If it was mild, strong, medium. Did it include pressure or other sensations. A few comments to help describe, but, to make it easier to keep track, lets keep the responses and other discussion on the sounds forum. Also, if you wouldn't mind, drop a note at the Earthwaves Ear tone registry as well. http://www.earthwaves.org/eartones.html