Toll 21. A square wave at 220 Hz, originating from Nuclear Plant. Recorded in a chamber environment, era: 1970s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5366 — Toll 21
ID#5366
Rarity
MID:42%
Frequency
220 Hz
X-HI:8%
Wave Type
Square
X-HI:10%
Resonance
Hollow
X-HI:5%
Era
1970s
X-HI:6%
Origin
Nuclear Plant