Vortex inline fans?

[MrAutoGrower]

Not sure this is accurate but here’s my “quiet” 5 inch mixed flow ram with no other audio to interrupt. Around 59db on speed one inside the tent with the phone recordings beside fan (I am using acoustic ducting) lol. With speed two it goes up to 65db. It is sitting upwards on wood. I am working on installing a pole today to hang them by.

Currently situated like this. I’m aware there will be viberation on the wood that might increase sound but geez man 65db with not enough air movement and with acoustic ducting

 

[MrAutoGrower]

Will shortening my exhaust ducting impact my fan? It’s pretty damn short and im wondering if its too short now, and that it may be restricting airflow. I know bends, and longer ducting affects it. But wondering if short ducting does too