At 07:53 AM 2/14/2003, Jay L Snyder wrote:
>A piece of hose works just as well.  Just don't get it caught it anything.

Hose gives different results -- that will let you localize sounds in the
air which is certainly useful; but a stethoscope (or the famous screwdriver
trick) lets you hear and locate sounds travelling through the metal that
never make it to the outside in any audible way.  A regular mechanic's
stethoscope has a thin metal diaphragm with a long thin rod extending from
the middle.  The diaphragm is what converts the vibrations of the rod to an
airborne sound that travels through the tubes into your ears.  Only real
difference from a doctor's stethoscope is the rod sticking out, and the
doctor's ones are made better...they both have a diaphragm of some sort.

david

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"