Whisper 24. A triangle wave at 220 Hz, originating from Subway Tunnel. Recorded in a vacuum environment, era: 1940s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5468 — Whisper 24
ID#5468
Rarity
LO:58%
Frequency
220 Hz
X-HI:8%
Wave Type
Triangle
X-HI:8%
Resonance
Soft
X-HI:8%
Era
1940s
EX:4%
Origin
Subway Tunnel