Clang. A triangle wave at 142 Hz, originating from Subway Tunnel. Recorded in a cave environment, era: 1920s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #2395 — Clang
ID#2395
Rarity
LO:66%
Frequency
142 Hz
X-HI:9%
Wave Type
Triangle
X-HI:8%
Resonance
Dense
X-HI:6%
Era
1920s
EX:4%
Origin
Subway Tunnel