Keen 17. A sine wave at 440 Hz, originating from Subway Tunnel. Recorded in a cave environment, era: 1950s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #3778 — Keen 17
Owner![]()
0x1f59079086165BE2D4c0B9dc80aB00FF716C12Bd
ID#3778
Rarity
MID:33%
Frequency
440 Hz
X-HI:7%
Wave Type
Sine
X-HI:13%
Resonance
Dense
X-HI:6%
Era
1950s
X-HI:5%
Origin
Subway Tunnel