Ping 86. A sine wave at 40 Hz, originating from Arctic Tundra. Recorded in a cave environment, era: 1990s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1372 — Ping 86
ID#1372
Rarity
LO:62%
Frequency
40 Hz
X-HI:5%
Wave Type
Sine
X-HI:13%
Resonance
Crystalline
X-HI:5%
Era
1990s
X-HI:9%
Origin
Arctic Tundra