Bob, you might also want to search the forum for FasTrack noise, there are a lot of links. It is my understanding that FasTracks is much noisier than S-Trax.
https://ogrforum.ogaugerr.com/...tring=fastrack+noise
https://ogrforum.ogaugerr.com/...strack-s-noise-level
https://ogrforum.ogaugerr.com/...-for-sound-dampening
https://ogrforum.ogaugerr.com/...lost-thread-on-noise
Tom Stoltz
in Maine