Hollow 31. A sine wave at 142 Hz, originating from Subway Tunnel. Recorded in a open air environment, era: 1980s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1416 — Hollow 31
ID#1416
Rarity
LO:68%
Frequency
142 Hz
X-HI:9%
Wave Type
Sine
X-HI:13%
Resonance
Harsh
X-HI:8%
Era
1980s
X-HI:8%
Origin
Subway Tunnel