Known Hollow. A triangle wave born in Nuclear Plant, resonating since 1990s. Captured at 528 Hz in a container space. One of 350 Legendary echoes — sounds that almost escaped recording.
Name
ECHO #3276 — Known Hollow
ID#3276
Rarity
MID:32%
Frequency
528 Hz
X-HI:6%
Wave Type
Triangle
X-HI:8%
Resonance
Soft
X-HI:8%
Era
1990s
X-HI:9%
Origin
Nuclear Plant