Purr 89. A fm wave at 220 Hz, originating from Subway Tunnel. Recorded in a open air environment, era: 1950s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #5137 — Purr 89
Owner![]()
0x6A29487D6E13D966842348B51c079A131A5F7ACA
ID#5137
Rarity
LO:69%
Frequency
220 Hz
X-HI:8%
Wave Type
FM
EX:4%
Resonance
Crystalline
X-HI:5%
Era
1950s
X-HI:5%
Origin
Subway Tunnel