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This is the tone produced by what seemed to be a building security system reporting a problem with its state. The building was a nursing home.
Type
Wave (.wav)
Duration
0:31.415
File size
2.6 MB
Sample rate
44100.0 Hz
Bit depth
16 bit
Channels
Mono
6 months, 2 weeks ago
FYI: this sounds like an uninterruptible power supply (UPS) or "battery backup" going off to indicate something is wrong with the battery in the unit.