Duct Muffler Question

I'm looking for someone that has a duct muffler installed? How much does it reduce the exiting exhaust air from your duct?

It seems that the air coming out of the duct is louder than the fan it self.

Seriously, know one has first had experience with a duct muffler from Can-Fan, or any other manufacture?

never needed one....I have always used insulated duct from home depot

So I was looking at this..
http://www.bghydro.com/BGH/itemdesc.asp?ic=AFACFMMM&eq=&Tp=
and this..
http://www.bghydro.com/BGH/itemdesc.asp?ic=AFADS04&eq=&Tp=

Mr.Bob Saget said:

So I was looking at this..
http://www.bghydro.com/BGH/itemdesc.asp?ic=AFACFMMM&eq=&Tp=
and this..
http://www.bghydro.com/BGH/itemdesc.asp?ic=AFADS04&eq=&Tp=

Click to expand...

is this an intake fan or exhaust??

handlitten said:

is this an intake fan or exhaust??

Click to expand...

They can go on either, I would assume...But I was interested to know how well they work on the exhaust side.

If you are using an exhaust system to vent a small tent or room, I want to know how well these work to bring the Db level of the exhaust air coming out of the vent.

Ya ive had the same issues, but i think ive figured out that im just going to run my ducting from my wardrobe into the actual ventillation system of my house.