Looking for a quiet fan for 5x5x7 Vortex is too loud.

I'm just getting started and I'm looking for a fan that will create a good vacuum in my 5x5x7 tent. The vortex fan is simply too loud for my situation, Are 6"inline duct fans (250cfm) viable with 6" cool tube plus carbon filter? What is the difference in noise? Is there a fan that pulls 400+ cfm that is very quiet?

Any suggestions are completely welcome!

you got to use the vortex or a sim noisemaker. Upside tho is some fun diy. Go to lowes get some soundboard. Go to home depot and get some insulated ducting. Build a box around your fan and hook up insulated ducting on both sides of the fan. QUIET! Well a lot quieter and a big diference. I run an 8 inch and i keep it quiet a chhesy way right now with blankets wrapped around it and ducting. But I had a box that worked better.

Yeah you need a can fan but you can get a bigger one and a controller and just run it at a lower speed