Pop 07. A triangle wave at 741 Hz, originating from Subway Tunnel. Recorded in a container environment, era: 1960s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0402 — Pop 07
ID#402
Rarity
X-HI:13%
Frequency
741 Hz
X-HI:5%
Wave Type
Triangle
X-HI:8%
Resonance
Harsh
X-HI:8%
Era
1960s
X-HI:6%
Origin
Subway Tunnel