Crest 60. A sine wave at 741 Hz, originating from Subway Tunnel. Recorded in a cave environment, era: 1980s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #1247 — Crest 60
ID#1247
Rarity
LO:55%
Frequency
741 Hz
X-HI:5%
Wave Type
Sine
X-HI:13%
Resonance
Warm
X-HI:11%
Era
1980s
X-HI:8%
Origin
Subway Tunnel