Rattle. A noise wave at 40 Hz, originating from Subway Tunnel. Recorded in a anechoic environment, era: 1920s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5053 — Rattle
ID#5053
Rarity
X-HI:12%
Frequency
40 Hz
X-HI:5%
Wave Type
Noise
X-HI:6%
Resonance
Brittle
X-HI:6%
Era
1920s
EX:4%
Origin
Subway Tunnel