This is taken from (and an answer to) Mxsmanic's "Trip on Métro Line 9 in Paris, France", at 2:20 exactly: metro on rails through the tunnel, which resonance creates this sound (very familiar to me as I live here).
Interesting to notice that the sound's frequency stays around 483hz, which was (in the ancient solfeggio frequency science attributed to Pythagoras) the frequency of "opening consciousness".
Type
AIFF (.aiff)
Duration
0:18.000
File size
3.0 MB
Sample rate
44100.0 Hz
Bit depth
16 bit
Channels
Stereo
You can copy, modify, distribute and perform the sound, even for commercial purposes, all without the need of asking permission to the author. Get attribution text...
920 x 245
481 x 86
375 x 30
