Quiet exhaust fan?

So I've been running a 6" vivosun exhaust fan and shes getting loud, im figuring its about to take a shit, looking for recommendations for a replacement that runs much more quiet, thanks

Ac infinity is super quiet

I upgraded to a terrabloom inline fan 2 yrs ago & it’s still going strong. Much quieter than the 6” old can fan and has vari- speed control

https://terra-bloom.com/?gclid=Cj0KCQjwpreJBhDvARIsAF1_BU3H86c7Un2OX8ipYOZ9zlyNWxC3yXWjNRs_zCAWnQJEv66hb-hqCA4aAii9EALw_wcB

I have the AC Infinity 6" fan. I am not happy with the fit - the flanges are smaller than standard ducting size, and I had to shim out my duct fitting with some weather stripping, and use extra tape to get it properly sealed. I probably wont buy another one. I also have a S&P TD-Quiet series 6" that I think is a better fan, and is pretty quiet as well, but I used the ACI because it had a speed control (the S&P does not). I will probably change out the AC for the S&P in the future, when I get a silent speed control for it.