My studio has a damp problem, so I use a dehumidifier to help control the issue. Is it safe to leave it running round the clock given the recording equipment I’ve got in there namely laptops, keyboards, guitars, etc, etc? Is that bad for the instruments? And also will it affect the acoustic tiles/foam? Can it impact on the bass boom?
I do not know what the impact on sound energy is by having it move through air that has more than average levels of moisture in it. I am certain your higher humidity levels do not have any impact on low frequency waves which will produce resonances that give us “bass boom”.
Get the air moving faster in your room and lower the humidity levels with your dehumidifier. Fans will definitely have an impact on your middle and high frequencies. Use Dyson fans if they can move enough air. You can also use activated carbon or charcoal to absorb moisture and filter your room air.