Rumble. A sine wave at 142 Hz, originating from Subway Tunnel. Recorded in a infinite hall environment, era: 1950s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5373 — Rumble
ID#5373
Rarity
HI:25%
Frequency
142 Hz
X-HI:9%
Wave Type
Sine
X-HI:13%
Resonance
Viscous
EX:3%
Era
1950s
X-HI:5%
Origin
Subway Tunnel