Sounds like a leer jet is in my closet, advice for noise reduction - Page 2

pokernaut · #16 (**permalink**) 09-08-2007, 01:32 AM

yes, restriction makes wind turbulence noise. the same effect applies to heater grilles. i had one in right next to my couch in a livingroom that howled like a banshee when i tried to close the vent which didn't seal all the way. to stop it, i taped a piece of cardboard over the vent and it totally stopped it from making any noise and the wide open unit in the corner stayed fairly quiet as it was wide open.

the whole "dimmer" concept doesn't sound bad either. fans DO have a sort of dimmer too at that. most fans have high, medium & low settings on them which basically regulate the power to the motor. i don't know how light dimmers differ. i would think it's just a difference between potentiometers vs. resistors. pots are continuously variable & resistors have set values.

just lower your airflow. if it's that loud, you must be moving alot of air.

another thing you could do is add more ducting like another line or use larger diameter tubing. then, the air would meet less resistance and flow more easily. it's the same idea behind a whistle, the harder you blow, the louder it gets. the less resistance air gets, the quieter it gets like a gentle breeze.

sounds like you're overtaxing the system trying to force too much air through it.

sizzlasia · #17 (**permalink**) 09-08-2007, 08:48 AM

Probably correct, but too much circulation is not a bad thing! The box isnt very big for the temps to stay exactly the same inside it as outside with a 400 watter within 2 inches from the canopy.

Its alright though.. pretty sure im gonna lose the box soon anyway and upgrade

bongz4brainz · #18 (**permalink**) 09-17-2007, 06:41 PM

This Might sound to good to be true but the easiest thing to do is extend the ducting outside of your grow, im using 6" flexi white ducting, and i wrap it in a bath towel, with straps to hold it in place, it dampens the sound and makes it light tight.

pokernaut · #19 (**permalink**) 09-18-2007, 02:38 AM

too much circulation through too small a hole IS a problem especially if you're trying to be stealthy.

if you just double your airl ducts, then each would work half as hard. you get the same or even BETTER circulation without stressing a single hose. it's an easy and cheap DIY solution especially if you want max air flow

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#16 (permalink) 09-08-2007, 01:32 AM
pokernaut Registered User Join Date: Oct 2006 Posts: 1,061	yes, restriction makes wind turbulence noise. the same effect applies to heater grilles. i had one in right next to my couch in a livingroom that howled like a banshee when i tried to close the vent which didn't seal all the way. to stop it, i taped a piece of cardboard over the vent and it totally stopped it from making any noise and the wide open unit in the corner stayed fairly quiet as it was wide open. the whole "dimmer" concept doesn't sound bad either. fans DO have a sort of dimmer too at that. most fans have high, medium & low settings on them which basically regulate the power to the motor. i don't know how light dimmers differ. i would think it's just a difference between potentiometers vs. resistors. pots are continuously variable & resistors have set values. just lower your airflow. if it's that loud, you must be moving alot of air. another thing you could do is add more ducting like another line or use larger diameter tubing. then, the air would meet less resistance and flow more easily. it's the same idea behind a whistle, the harder you blow, the louder it gets. the less resistance air gets, the quieter it gets like a gentle breeze. sounds like you're overtaxing the system trying to force too much air through it. Last edited by pokernaut; 09-08-2007 at 01:34 AM.

#17 (permalink) 09-08-2007, 08:48 AM
sizzlasia Registered User Join Date: May 2007 Posts: 273	Probably correct, but too much circulation is not a bad thing! The box isnt very big for the temps to stay exactly the same inside it as outside with a 400 watter within 2 inches from the canopy. Its alright though.. pretty sure im gonna lose the box soon anyway and upgrade

#18 (permalink) 09-17-2007, 06:41 PM
bongz4brainz Bongz4brains Join Date: Dec 2006 Location: Canada Posts: 5	This Might sound to good to be true but the easiest thing to do is extend the ducting outside of your grow, im using 6" flexi white ducting, and i wrap it in a bath towel, with straps to hold it in place, it dampens the sound and makes it light tight.

#19 (permalink) 09-18-2007, 02:38 AM
pokernaut Registered User Join Date: Oct 2006 Posts: 1,061	too much circulation through too small a hole IS a problem especially if you're trying to be stealthy. if you just double your airl ducts, then each would work half as hard. you get the same or even BETTER circulation without stressing a single hose. it's an easy and cheap DIY solution especially if you want max air flow

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