The beautiful sounds of office life.
This is audible interference from a cheap ballast in a florescent light fixture--or several in close proximity. (It's probably violating FCC regulations with RF output too.) This was recorded with an iPhone builtin mic, then processed to isolate the sound.
It's a beeping / humming at around 3,800 Hz. Each beep lasts about 1 second, followed by a half-second of silence before the next beep. Toward the end of this recording, it shifts slightly upward in pitch, to around 4,000 Hz.
Some typing on a keyboard can be heard in the foreground. (It's an office, after all.)
Type
Mp3 (.mp3)
Duration
0:11.053
File size
259.3 KB
Sample rate
48000.0 Hz
Bitrate
192 kbps
Channels
Mono
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