Ghost 06. A square wave at 528 Hz, originating from Subway Tunnel. Recorded in a underwater environment, era: 2000s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #2975 — Ghost 06
ID#2975
Rarity
LO:66%
Frequency
528 Hz
X-HI:6%
Wave Type
Square
X-HI:10%
Resonance
Soft
X-HI:8%
Era
2000s
X-HI:8%
Origin
Subway Tunnel