Double Bass Peacock's and Patitucci's mystery floating microphone

[Nivaca]

I've seen many videos of Gary Peacock (with K. Jarrett) and of John Patitucci (with C. Corea) where they place a regular microphone floating in between the legs of the bridge (using a foam or something).
Does anybody know how is it really placed? What kind of microphone is it? Has anybody tried that? Thanks in advance.

I post a pic of "The Keith Jarrett Trio Live at Open Theatre East" (1993), where the mic can be seen. BTW, a great concert I recommend.

 

[Ashley Long]

I have a feeling that they could be th Accusound contact mike but Im not sure. I really cant tell from the picture.

[Invalid or Expired Link Removed]

 

[Nivaca]

I have a feeling that they could be th Accusound contact mike but Im not sure. I really cant tell from the picture.[Invalid or Expired Link Removed]

I don't think so; it seems to be just a normal type (i.e., a handheld dynamic or condenser) microphone. (Whereas Accusound mics are designed specifically for instruments.)

 

[Ric Vice]

I don't know for sure, but It could be the same AKG mic
that Dave Holland uses