Rigid/solid pipes vs acoustic ducting for sound proofing?

[HandyGringo]

I'm building a grow closet with 2 compartments, one is a veg chamber/clone room, and I will be running a duct through it, down to the flower room. Will an acoustic flexible duct be more quiet than a rigid firm straight pipe/duct or what ever you call it?

I've heard conflicting things on both.

 

[SPLFreak808]

My noise went down switching to acoustic ducts from aluminum ducts. Same fans same diameter ect..
I also use 50mm butyl sound deadener on my inlines and ballast which helps.

 

[HandyGringo]

My noise went down switching to acoustic ducts from aluminum ducts. Same fans same diameter ect..
I also use 50mm butyl sound deadener on my inlines and ballast which helps.

Can you link me to some of that 50mm butyl thing?

NVM; found it, if it's this

 

[bseeds]

straight pipe would be better with insulation around it

 

[HandyGringo]

straight pipe would be better with insulation around it

Not sure if that's a thing though. Like unless I build it myself.

 

[SPLFreak808]

Can you link me to some of that 50mm butyl thing?

NVM; found it, if it's this

https://www.amazon.com/Noico-deadening-automotive-Insulation-dampening/dp/B012AVX5HQ


Dont put too much on the ballast, dont want it to get too hot

 

[HandyGringo]

https://www.amazon.com/Noico-deadening-automotive-Insulation-dampening/dp/B012AVX5HQ


Dont put too much on the ballast, dont want it to get too hot

So you just place the inline fan on those? or wrap them in it?

 

[bseeds]

think you would have to build it but it would be quiet air going through ruffle ducting makes noise that's why they put the insulation to quiet it

 

[SPLFreak808]

So you just place the inline fan on those? or wrap them in it?

any buzz or resonation from metal will be removed with sound deadener. You only need a few strips here and there for it to work, i have a few 2" x 4" strips on my inline fan and i cant tell if its running or not, i actually gotta feel the vents for pressure to see if its on. You'll see what i mean after you put a few strips on.

Now if you have noise from vent pressure thats a different story and will require a less restrictive vent or a vent with a bigger diameter just as bc is pointing out.

 

[HandyGringo]

any buzz or resonation from metal will be removed with sound deadener. You only need a few strips here and there for it to work, i have a few 2" x 4" strips on my inline fan and i cant tell if its running or not, i actually gotta feel the vents for pressure to see if its on. You'll see what i mean after you put a few strips on.

Sounds awesome, I'll see if I can find some in Europe! And, do you put them around the inline fan? Or below? Or what?

 

[SPLFreak808]

Sounds awesome, I'll see if I can find some in Europe! And, do you put them around the inline fan? Or below? Or what?

I put them around the inline fan, and i sit my inline on a small sheet also. Thats it