Wave 89. A triangle wave at 142 Hz, originating from Subway Tunnel. Recorded in a cathedral environment, era: 1980s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1276 — Wave 89
ID#1276
Rarity
X-LO:78%
Frequency
142 Hz
X-HI:9%
Wave Type
Triangle
X-HI:8%
Resonance
Harsh
X-HI:8%
Era
1980s
X-HI:8%
Origin
Subway Tunnel