Thanks B96-- i had forgotten about definition 5 5.To examine (a body organ or part) by causing to emit sound; auscultate. i'll thank those prone toward ribaldry to leave this one alone

I am sure Dr. Bill knows it-- and I know i have been "sounded"-- it is done when you have pneumonia-- a doctor will tap on your back -- and see if your lungs sound hollow (good) or not (bad--filled with fluid)– the opposite is true if done to your head–hollow (empty is bad)- dull thud – full is good

i wonder if the term for the same process when baking bread-- you know when its done by the sound of the loaf-- a hollow sound is done.

and its done (or was done) to barrels.. And boats.. The sound that returned indicates something–hollow is bad for a barrel but good for a hold on a boat.