Delta BFB1212GH - Fan Noise
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- Опубликовано: 13 сен 2024
- Datasheet: www.delta-fan....
Its a Delta blower that produces 104 mmH2O of pressure, so of course it will be loud. Unfortunately, it's very annoying-sounding at low RPMs too. There is also some weird aerodynamic effects with this, it sometimes seems to lose a lot of its its pressure if there is enough impedance at the outlet, which doesn't line up with the PQ curve on the datasheet. Might just be my unit being a bit faulty.
Also oops its a bit out of focus in this video. Not like there's a lot to look at though with the blades being pretty enclosed on blowers. The blades are a bit forward-angled, so it is designed to move some volume of air and not just be a compressor.
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Turbo: shuts off*
blow off valve: Stutututututu
Holy.... we are taking off
It might be cool to test GPU fans. Don't see anyone doing that. From what I can tell, I'm impressed with the ASUS TUF fans, since they get up to 3000 RPM without really bothering me.
I would be interested to do that too. I think larger graphics card fans tend to be 90-100mm in diameter, smaller than most 120mm fans, and thinner too (usually about 10-15mm), so they will be quieter and less performant than a similar 120mm fan at the same speed. But the new ASUS axial-tech fan designs do seem pretty good, they have clearly put effort into improving the design over the years.
Unfortunately, graphics cards are difficult to get at the moment, but I could try just getting the replacement fans separately off ebay or something.
@@ydihtty Yeah, I was thinking of just testing replacement fans. The ASUS fans are also dual ball bearing, which is a huge improvement over the sleeve fans that GPUs used to use. Also, I thought that thinner fans were louder at a given RPM.
@@malceum Basically all graphics card fans (except extremely cheap ones) are ball bearing. I'm not sure if that's due to the size constraint, because a fluid bearing would probably be better - ball bearings do make some noise as the rotor turns.
Also I mean that thicker fans tend to be louder because they are moving more air at a given RPM. But they can generally move more air than a thinner fan when noise-normalised. Of course there are exceptions to this though.
@@ydihtty try the gtx 1060 they quite loud
@@Kadencabs The founder's edition? Most of those blowers are pretty similar.
😂 the initial sound. Let’s call this one ‘the drop saw’.
Wow that took off eh haha.
Made me think that if there were a flag/paper or something that gave a visual representation of the air flow force, it may be another distinguishing facet of these tests. But that might throw your db levels out, so probably not a great move.
Keep ‘em coming!
I see some other channels do that, and it's mainly kind of measuring static pressure. This is basically because the velocity of the air is converted to pressure when it collides with something, exerting force on it. Its very unscientific, but it is a simple and effective way to visualise things at least. It could maybe better be used to visualise the distribution of the airflow, although a smoke machine would also achieve this.
It would be cool to test the pressure properly, by blowing air into an otherwise sealed chamber, with a water pressure gauge attached to it, so that a mm H2O reading can be taken. Blowers are exceptionally good at creating static pressure compared to axial fans, so the readings might be pretty crazy for this particular blower.
a 4 amp fan; yeah u will hear this thing for sure :-D
It not only sounds bad, but is horribly loud
I thought blower fans are much quieter than regular fans because my mac mini(intel) doesn't make unpleasant sound even at high revs
It just depends on the particular fan. This is quite a powerful blower, other blowers tend to be much less powerful, and Macs are generally optimised for quietness
when the vtec kicks in
For this video, my microphone is still about 20cm away, but I did some maths in my script to calculate the dBA from 1m using an attenuation formula and some extra adjustment so that the numbers lined up with official sound level figures from several different companies. www.omnicalculator.com/physics/distance-attenuation#sound-attenuation-formula
Its not an officially calibrated system, but given that the numbers line up decently for a few different fans, I think its at least accurate enough for these videos.
That high pitch so loud..
Turbo 😂😂😂
:V