Dehumidifier

i had to get a big industrial dehu for my space. the little ones weren't touching the humidity and after my biggest buds ive EVER grown got lost to mold, i spent 100 on some chinese model off of amazon and it keeps my unsealed garage as low as i want and free water for the plants

Nothing with a compressor will be quiet IMO. Smaller thermoelectric-driven dehumidifiers are silent but would run into issues depending on how quickly you are turning over air in your tent. Either way, targeting your lung room/exterior environment to your tent and adjusting your CFM dynamically will be the best way to approach keeping your humidity within the tent in the desired range. In system dynamics, inputs always win. Targeting the middle of the system without changing the inputs is a losing battle in theory and practice. Anything will work, really. If you have to use compressor-driven devices (which research is showing is hell on trichome integrity), then possibly put some distance between flowers and the device (draw through a carbon filter or something). This is all tippy, top doing it by the books type suggestions. Make it work where you have to of course. A small peltier module with the hot side heat sink offset outside of the tent, a PC fan, and a drain hose can work if you aren't turning over air.