dave,
thanks for your input.
In my experiment, I clipped the Sansa Clip onto my shirt. At times, the other party’s voice was heard more clearly than my own.
I observed that when the Sansa Clip is moving on the shirt, a loud sound drowns out any voice. THe person wearing the Clip must not move too much.
I’ll try next time to put the Sansa Clip on the center of a table between 2 people and see if this is better.