Posted by Dan Schultz on September 10, 2003 at 21:37:19:
In Reply to: The biggest BAT posted by Daryl Hickman on September 10, 2003 at 08:25:46:
The source could be digital pulses in the form of light instead of the sine wave we usually associate with sound. The 'sound' was probably detected by digital equipment... not on a scope of some sort.