Groan. A sine wave at 2400 Hz, originating from Deep Ocean. Recorded in a cave environment, era: 2010s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #2893 — Groan
ID#2893
Rarity
HI:22%
Frequency
2400 Hz
EX:4%
Wave Type
Sine
X-HI:13%
Resonance
Crystalline
X-HI:5%
Era
2010s
X-HI:7%
Origin
Deep Ocean