Unknown source of rumble/vibration in wall

Увеличение звукоизоляции перегородок, плавающих полов и подвесных потолков

Unknown source of rumble/vibration in wall

Сообщение carterturner » 05 авг 2017, 14:08

So this has been happening for around 2 months now.
We have a deep rumble in the 50hz/60hz range at 60db (dba for that frequency) in our bedroom that only occurs at night to early morning (11pm to sometimes 9am). We are on the third floor of a condo unit. it is coming from the side wall/corner where our building connects to the next (though as best as we can tell it is coming from a bit which is a little bit past the next building, they aren't exactly in line. These are in NYC by the way)
The sound started after some AC guys did some work on the building. Originally we though it was some of the AC condenser units outside, but we have flipped the fuses on those and there was no change.
Please Help.
Thanks !
I didn't find the right solution from the internet.
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