Trace 14. A sawtooth wave at 220 Hz, originating from Subway Tunnel. Recorded in a cave environment, era: 1970s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0112 — Trace 14
ID#112
Rarity
LO:62%
Frequency
220 Hz
X-HI:8%
Wave Type
Sawtooth
X-HI:9%
Resonance
Dense
X-HI:6%
Era
1970s
X-HI:6%
Origin
Subway Tunnel