Keen. A triangle wave at 741 Hz, originating from Urban Grid. Recorded in a container environment, era: Pre-War. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #2708 — Keen
ID#2708
Rarity
MID:46%
Frequency
741 Hz
X-HI:5%
Wave Type
Triangle
X-HI:8%
Resonance
Hollow
X-HI:5%
Era
Pre-War
EX:3%
Origin
Urban Grid