Thanks for clarifying. So, based on what you just wrote, you are referring to noise emitted by the pick after it strikes (i.e. comes off) the string, due to motion imparted by the string-pick release. Actually, that IS "one of the above." It is the sound described in post #21, which said:
"I use the term "pick click" to designate the noise associated with the pick hitting the strings."
This is not about pick contact with the fretboard or mandolin top -- which was a source of confusion. It is about pick contact with the string. Therefore, my earlier posts seem to have correctly interpreted what you meant, which addressed the sources, in the pick stroke and in the pick itself, that are chiefly responsible for this noise.