Rift 34. A square wave at 528 Hz, originating from Subway Tunnel. Recorded in a corridor environment, era: 1980s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0726 — Rift 34
ID#726
Rarity
MID:47%
Frequency
528 Hz
X-HI:6%
Wave Type
Square
X-HI:10%
Resonance
Viscous
EX:3%
Era
1980s
X-HI:8%
Origin
Subway Tunnel