Quiet. The Neighbors Can Hear You (Sound Control Thread)

Discussion in 'Indoor Growing' started by one2threeBUDS4, Oct 21, 2008.


    waynejohn Active Member

    Yeah as soon as i saw the specs i went for it...hopefully someone will recommend what to get to control it...i want that 0-10V but not sure it will work with mixflow
    Lucky Luke

    Lucky Luke Well-Known Member

    Rrog likes this.

    ANC Well-Known Member

    That is a good video, I saw it before.
    I would recommend always spending a bit more and getting a quiet fan made from plastic.
    You get ridiculously silent ones for not much more than the standard jobbies.
    sworth, Johnei and Lucky Luke like this.

    wellandwitham Member

    Check out WAC1 fan controller. Good for fans l as than 6 inch. No hum and about $30
    Rrog and waynejohn like this.

    grassy007 Well-Known Member

    For 4" and 6" Vivosun type plastic fan housings, I took a 12x12x13" cardboard box (for 4" fan) and cut two U shaped cutouts so the box would fit over the unit's 2 ducting connector openings. I then went to a carpet store and they had a stack of carpet samples that are discontinued. I got 5 of them for free. I then bought double backed tape from HD and cut fit the carpeting and used the double sided tape to afix the carpet to the inside of the box. It worked great. I wish I had a workshop to make one out of plywood. It cut the sound by a third to a half. Total cost $5.50 (for the double sided tape).
    Lucky Luke likes this.

    grassy007 Well-Known Member

    Ya, except all the Google searches for it were all from the UK. It also needs to be wired in.

    grassy007 Well-Known Member

    For stealth grows and making the ducting more quiet, the only insulated ducting I could find is for temp insulation rather than noise insulation. It lessened the noise coming from the fan housing, but not much. It's better than the plain aluminum ducting which just carries the duct fan motor noise thruout its length. Is there even any insulated ducting that's made from more than just fiberglass? Fiberglass insulated ducting is better than plain aluminum ducting, but not great at sound absorbtion, never was meant to be.

    fn217 Active Member

    Unfortunately due to my post count, I can't post the link. But the stuff you want is Thermoflow Insulated Ducting. Pricey, but exactly what you're looking for.

    Rrog Well-Known Member

    Insulated duct is insulated duct.

    fn217 Active Member

    While this is true, the thermoflow is the best readily available insulated duct IMO. Extremely durable, almost impossible to rip, fire retardant, extra vapor barrier, etc.

    fn217 Active Member

    I just wanted to share with everyone a product which I am using which I highly endorse.

    Hyperfan Stealth:

    Digitally controllable (works amazing!!) and it really is very quiet for the CFM's it pulls. Maybe the Max Fan is better. I don't know, I haven't had the opportunity to test it.

    I have a 10" Hyperfan Stealth, pulling air through a 10 inch carbon filter. While it inevitably creates the sound of a vortex (strong airflow), it is muffled to the point that one really doesn't even hear it over the other oscillating fans in the room (12 lol) until you turn it off. Similar to a silencer for a firearm I suppose. Still makes noise, but the tell tale sound and loudness of your typical high CFM inline fan is very much absent.

    Rrog Well-Known Member

    More durable, but acoustically identical.

    grassy007 Well-Known Member

    For growers...there should be something better than insulated ducting that's fiberglass only . Something better sound absorbing than just weather insulation fiberglass...which is ok but very so-so at sound absorption.
    Last edited: Oct 21, 2017

    Rrog Well-Known Member

    Well, fluffy stuff has no real mass, and so is not effective for anything but high frequencies. That’s fine if the noise you’re stopping is high frequency like airflow thru a duct.

    If you’re doing a broader scale soundproofing, like walls and ceiling, then you’re looking at 5/8” drywall for the mass
    coreywebster likes this.

    grassy007 Well-Known Member

    I can't afford the pricey ducting that's meant for sound reduction, but now I know it's out there.
    The fiberglass insulated ducting seems to have quieted down my stealth grow, not a lot, but quieter than plain aluminum ducting.
    I have a carbon muffler,

    Javadog Well-Known Member

    I took a 2X12 and made a box with 2" walls but for one.

    With extreme force I manage to cram a section from a Boogie Board
    to complete the box.

    This made a true air pump (not a fish tank number here ;0) *livable*

    ...but, there was still a low frequency "rum" that I kept waiting for "my sensitive half"
    to have an issue with. I made it through one amazing cycle. Now the pump
    works my tea barrel out back...or it did until SDGE started to threaten us with
    "high use" warnings. WTF?!?

    BigCityGrow Member

    I'm mocking up a new cabinet build. Needs to be super quiet since it's in the living room or possibly my bedroom. I want to build a box with in the cabinet to help further keep the noise down. So final product would have a back and front door. Dynamat lining inside. I wanted to make sure it all fit in the cabinet before I start building it. It's all going to fit. The fan itself, Vortex is super quiet anyways it seems. Most of the noise is the whooshing noise of the air coming out of the top when its on full blast. When I turn the speed down it almost goes away.
    We use a heavy plastic like tubing on our machines to take the dust out of the shop, I'm going to try and use that and see if it helps even more. Looking for more tips and suggestions.

    Thanks!! IMG_7758.JPG

    Rrog Well-Known Member

    Use a layer of green glue and a second outer layer of ply. Dynamat works best on thin panels like steel. It can’t effectively damp panels like that

    Use uncompressed fiberglass in between the inner and outer box
    coreywebster likes this.

    coreywebster Well-Known Member

    You could step up in ducting size if its air movement sound that's the issue. You can also wrap the duct with anything you like but ultimately sound will come out of the end. A stocking over the outlet will also defuse that whooshing a bit without impacting air movement much. Duct mufflers work to a degree.
    Rrog likes this.

    coreywebster Well-Known Member

    Also rigid smooth duct at the outlet point rather than the foil stuff will be quieter
    Rrog likes this.

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