Carrier 09. A pulse wave at 220 Hz, originating from Subway Tunnel. Recorded in a chamber environment, era: 1950s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #3968 — Carrier 09
ID#3968
Rarity
LO:57%
Frequency
220 Hz
X-HI:8%
Wave Type
Pulse
X-HI:7%
Resonance
Cold
X-HI:10%
Era
1950s
X-HI:5%
Origin
Subway Tunnel