Pulse. A sawtooth wave at 142 Hz, originating from Subway Tunnel. Recorded in a open air environment, era: 1990s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0311 — Pulse
ID#311
Rarity
LO:67%
Frequency
142 Hz
X-HI:9%
Wave Type
Sawtooth
X-HI:9%
Resonance
Soft
X-HI:8%
Era
1990s
X-HI:9%
Origin
Subway Tunnel