Closed Shriek. A triangle wave born in Subway Tunnel, resonating since 1920s. Captured at 888 Hz in a container space. One of 350 Legendary echoes — sounds that almost escaped recording.
Name
ECHO #4442 — Closed Shriek
ID#4442
Rarity
X-HI:9%
Frequency
888 Hz
EX:3%
Wave Type
Triangle
X-HI:8%
Resonance
Hollow
X-HI:5%
Era
1920s
EX:4%
Origin
Subway Tunnel