Rattle 74. A sine wave at 888 Hz, originating from Subway Tunnel. Recorded in a cathedral environment, era: 1950s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #4726 — Rattle 74
ID#4726
Rarity
LO:57%
Frequency
888 Hz
EX:3%
Wave Type
Sine
X-HI:13%
Resonance
Harsh
X-HI:8%
Era
1950s
X-HI:5%
Origin
Subway Tunnel