Ghost. A sine wave at 220 Hz, originating from Mountain Pass. Recorded in a chamber environment, era: 1990s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1042 — Ghost
ID#1042
Rarity
MID:46%
Frequency
220 Hz
X-HI:8%
Wave Type
Sine
X-HI:13%
Resonance
Soft
X-HI:8%
Era
1990s
X-HI:9%
Origin
Mountain Pass