Groan 72. A sine wave at 220 Hz, originating from Arctic Tundra. Recorded in a open air environment, era: 1920s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1754 — Groan 72
ID#1754
Rarity
X-LO:76%
Frequency
220 Hz
X-HI:8%
Wave Type
Sine
X-HI:13%
Resonance
Metallic
EX:5%
Era
1920s
EX:4%
Origin
Arctic Tundra