Chirp 88. A sine wave at 440 Hz, originating from Subway Tunnel. Recorded in a open air environment, era: 1960s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0582 — Chirp 88
Owner
0x122BbBE962ac10C8aF122915C6b2a01935A87838
ID#582
Rarity
LO:60%
Frequency
440 Hz
X-HI:7%
Wave Type
Sine
X-HI:13%
Resonance
Brittle
X-HI:6%
Era
1960s
X-HI:6%
Origin
Subway Tunnel