Tremor. A sine wave at 4096 Hz, originating from Urban Grid. Recorded in a chamber environment, era: 2010s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1186 — Tremor
ID#1186
Rarity
MID:49%
Frequency
4096 Hz
EX:3%
Wave Type
Sine
X-HI:13%
Resonance
Metallic
EX:5%
Era
2010s
X-HI:7%
Origin
Urban Grid