About the inexplicable low-frequency noise source of small high-rise buildings every night!

In view of what you said, let me help you analyze:

1, generally air conditioners don't produce low-frequency noise, and I usually use air conditioners in summer. You said that there is noise in winter, so you can rule out the air conditioning factor;

2, you said that the sound will come at night, basically can rule out the wind, because the wind will not come at night;

According to what you said, noise is made regularly every night, which may be caused by some machinery or motors that start at regular intervals. I suggest you consult the property management company and other units or houses around you that may use similar machinery, and be cautious;

Personally, I prefer the sound of high-pressure pump pumping water into the roof pool. Check the water pump operation records of the property company.

By the way, although your small high-rise building doesn't need a pool to store water for daily use, it should have a fire pool. Check it again.

A Bin, a real estate agent, will answer your questions.