Hollow. A square wave at 40 Hz, originating from Pacific Basin. Recorded in a chamber environment, era: 2000s. One of 5555 echoes — sounds no one thought to save.
Name
ECHO #3970 — Hollow
ID#3970
Rarity
LO:75%
Frequency
40 Hz
X-HI:5%
Wave Type
Square
X-HI:10%
Resonance
Warm
X-HI:11%
Era
2000s
X-HI:8%
Origin
Pacific Basin