"Yukio YANO" wrote in message
news:Q0__d.726621$8l.66584@pd7tw1no...
Tom Potter wrote:
I am interested in analyzing surfaces of objects
to detect natural and man-made shaping of the object surface,
and I have been experimenting,
using a MP3 player/recorder to record the sound,
as I drag various fabrics attached to the player across the objects.

Use a Webcam, and if necessary put a magnifying lens in front !
Why are you trying to build an ACOUSTIC Force Microscope to examine
Macroscopic Objects !

A webcam would generate too much data.

I need a small, cheap, low power, portable device
that can be plugged into a computer USB port.

( This is for a possible consumer product.)

--
Tom Potter
http://home.earthlink.net/~tdp
http://photos.yahoo.com/tdp1001