Description
The air conditioner at the hotel clattering away in the corner for ten hours. It’s noisier than your AC at home, but it certainly masks the sound of disturbing neighbors next door. Maybe that is why people don’t complain often to the front desk about these classic units found in most hotels and motels.
There is a noise component from the fan moving air, and also a pronounced 60 Hz tone with upper harmonics like 120 Hz, 240 Hz, 600 Hz, and 1200 Hz based on the motor spinning at 1200 Hz and phase locked to the 60 cycle frequency.
1 and 10 hour audio mp3 downloads
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