Hiss. A sine wave at 142 Hz, originating from Nuclear Plant. Recorded in a cathedral environment, era: Pre-War. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1366 — Hiss
ID#1366
Rarity
MID:45%
Frequency
142 Hz
X-HI:9%
Wave Type
Sine
X-HI:13%
Resonance
Brittle
X-HI:6%
Era
Pre-War
EX:3%
Origin
Nuclear Plant