I just saw Practical Engineering's video on RR crossings, he mentions that they send AC signals down the tracks, sometimes in the audible range, to detect the train location. I wonder how that works! I am going to have to make some more higher sample rate recordings.
@chriskellenmurphy6 ай бұрын
Unexpected for sure! That is an uneasy sound. Would be perfect for a thriller movie score 😱
@metalmarshmallowllc Жыл бұрын
I legitimately had to stand in the freezing river with my socks and shoes on for that footage so you better subscribe 🔪🔪🔪
@mctavishmcardle6906 Жыл бұрын
i wonder if the loud hf noise is from the traction motors, since you were listening to a diesel-electric loco similarly: i wonder if the atc track circuit (assuming this isn't dark territory) is contributing anything
@metalmarshmallowllc Жыл бұрын
Interesting, I'm just realizing how much I don't know about how trains work!
@sr3d-microphones Жыл бұрын
Happy new year! Nice to see you. A very interesting upload. I wonder, as for the tracks, how long is each section? As I imagined that the tracks maybe adding a new rising tone until it gets to the new track, and as all the other wheels are behind the first wheels going over, the sound overlaps? But your assumption could very well be something to do with it. I am still quite busy with things here and still have to get a video up on your contact mics, bear with me!
@metalmarshmallowllc Жыл бұрын
Happy new year to you too! I'll have to look at the tracks again; interesting hypothesis. I'm glad to hear that you are staying busy, you aren't under any obligation to make a video unless you want to.
@sr3d-microphones Жыл бұрын
@@metalmarshmallowllc I feel I should defo make a video and point to your channel, if this helps in any way that is a bonus I would be very happy with! I don’t know any other channel dedicated to contact microphones where the developer knows the subject inside out and has an incredible passion in what they do.
@metalmarshmallowllc Жыл бұрын
@@sr3d-microphones Aw thanks ☺
@sinenkaari54775 ай бұрын
Have you tried playing this sound on the midi keys?