Hum 78. A sine wave at 19683 Hz, originating from Urban Grid. Recorded in a cave environment, era: 1960s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #0968 — Hum 78
ID#968
Rarity
MID:49%
Frequency
19683 Hz
EX:1%
Wave Type
Sine
X-HI:13%
Resonance
Cold
X-HI:10%
Era
1960s
X-HI:6%
Origin
Urban Grid