Experience with BT-BI158's?

["Steve Cox" naturalsoundscapes]

Does anyone have any experience with this binaural mic pair? I don't  
see specs listed on the frogloggers site. I'm not sure what "low  
noise" means in real numbers. I'd like to hear feedback on them  
before I order them. I'll be using them with the new Sony PCM-D50  
recorder.

I also ordered a couple of Tensimount suspensions for my AT-3032 I'll  
be using with my 722. For $20/ea it just didn't seem worth the time  
it to cut up more PVC like I did for the NT1-A's.  I do have a plan  
for a zeppelin I'll make that fits around the Tensimount. Anybody  
have any tips to share about the Tensimounts? I'll get mine some time  
early next week and I'll make some measurements and then work on the  
zeppelin.

thanks,
Steve Cox