I have a customer having problems with vacuum leaks (-50 kpa or so
range) in equipment that they manufacture.  I expect their
problem is with connectors and seals, and they have asked for help to
locate and correct the problem.  Seems simple enough to sniff around
with a tiny microphone.

Thought...why not develop a simple handheld field
tester...PIC...active filtering...LED bargraph...etc

Unknowns...are there audio signatures that would allow this...has it
already been cheaply and efficiently done...

Appreciate any input.

Regards/Roger, in Bangkok
Roger N. Shane
Suncolor Co., Ltd.
P.O. Box 11-303
Prakanong, Bangkok 10110
Thailand
Email:  roger@wnet.net.th
FAX:    +1 (707) 276-1170
        +66 (2) 291-3826
ICQ     2152164

SAHA GROUP...Thailand's Best!