Hum 16. A triangle wave at 20 Hz, originating from Urban Grid. Recorded in a vacuum environment, era: Pre-War. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0312 — Hum 16
ID#312
Rarity
X-HI:11%
Frequency
20 Hz
EX:4%
Wave Type
Triangle
X-HI:8%
Resonance
Phosphoric
EX:2%
Era
Pre-War
EX:3%
Origin
Urban Grid