Shore. A sine wave at 741 Hz, originating from Subway Tunnel. Recorded in a container environment, era: 1980s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #4942 — Shore
ID#4942
Rarity
MID:46%
Frequency
741 Hz
X-HI:5%
Wave Type
Sine
X-HI:13%
Resonance
Harsh
X-HI:8%
Era
1980s
X-HI:8%
Origin
Subway Tunnel