Murmur 09. A sine wave at 20 Hz, originating from Subway Tunnel. Recorded in a chamber environment, era: 1990s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5156 — Murmur 09
ID#5156
Rarity
X-LO:75%
Frequency
20 Hz
EX:4%
Wave Type
Sine
X-HI:13%
Resonance
Harsh
X-HI:8%
Era
1990s
X-HI:9%
Origin
Subway Tunnel