Keen 97. A sine wave at 220 Hz, originating from Mountain Pass. Recorded in a vacuum environment, era: 1970s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #4848 — Keen 97
ID#4848
Rarity
X-LO:77%
Frequency
220 Hz
X-HI:8%
Wave Type
Sine
X-HI:13%
Resonance
Warm
X-HI:11%
Era
1970s
X-HI:6%
Origin
Mountain Pass