The attenuation of sound in air is affected by the relative humidity.
Very loud noise in attic high humidity.
Grinding noise in the attic.
This is because moist air is less dense than dry air water vapor weighs less than air.
You might also install a humidistat that automatically turns your attic fan on to vent out humidity once the level exceeds 70 percent.
Fan noise is rated by sones it is the unit of measurement for evaluating how loud a bathroom fan is.
The attic fan tends to makes a humming noise when it has a few blades and is running at a high speed setting.
In order to get rid of the hum you need to either operate the fan at a low speed or replace the fan with a new one that has more blades.
The issue in the attic is that at 48 degrees f.
Skittering sounds squeaks buzzes and other noises coming from your walls and attic may mean there s something living in your house that isn t part of your family.
Snarling noise in the attic.
You simply set the desired humidity level turn on the unit and leave it running.
On the sone scale 0 5 to 1 2 sones means the fan is exceptionally quiet 1 5 to 2 0 sones is acceptable in many homes.
If you raise the attic temperature the rh in both places would be the same.
Dry air absorbs far more acoustical energy than does moist air.
If your concern is the loud noise dehumidifiers emit this model has a near quiet operation of around 46db.
In addition to bees ailion says raccoons squirrels and birds have been known to get into attics and cause noises of course mice and rats can do the same.
The lower the rating the quieter the unit.
If you don t mind white noise you can choose 2 to 4 sones.
Then with the heat on overnight the humidity level would rise back to the high 70 s.
Placing this lg dehumidifier in the attic can greatly improve the high humidity problem without too many interferences.
This is a classic squirrel in the attic noise.
That s just the properties of moist air.
Grinding noises are made as rodents chew woodwork.
They may be chewing to improve passageways or just for fun.
The high frequency crack has been attenuated more rapidly than the low frequency portion of the noise.
A rattling noise can mean that your air conditioner is starting to deteriorate and some of its parts are loosening.
Grinding noises are likely to be made by some type of rodent.
You are approaching the 43 deg dew point and some colder surfaces like windows you will get condensation there.
With our recent dry cold spell with sun throughout the day the levels would drop to the 50 s.
The difference in the two spaces is the dry bulb temperature.
An attic that stays overly humid for days or weeks on end can.
