Arc 69. A noise wave at 440 Hz, originating from Subway Tunnel. Recorded in a open air environment, era: Pre-War. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1553 — Arc 69
ID#1553
Rarity
LO:51%
Frequency
440 Hz
X-HI:7%
Wave Type
Noise
X-HI:6%
Resonance
Warm
X-HI:11%
Era
Pre-War
EX:3%
Origin
Subway Tunnel