About 2m away I got 35-40 db (and in that case I managed to make it "run smoothly").
Right now the case is open and I'm downloading data via FileZilla. Temperate is around 55°. With the fan it was just a bit above 30° (according to measure_temp).kerry_s wrote: ↑Tue Mar 03, 2020 9:07 pmthose fans are cheap mine went out after only a month, you can use the 3.3v connection to make it quieter or just go without and trust the heat sinks.
i been running mine with just the heat sinks since the fan started screaming one mourning. idle temp is now <45c, using temp is just a little above 50c for action packed 720p movies, nothing else i do actually strains it.
Yeah, they were among those recommended. Problem is, I couldn't find any 30x30.PhatFil wrote: ↑Wed Mar 04, 2020 12:36 amNoctua brand fans are the goto choice for 3d printer upgrades
but they are not cheap https://www.google.com/aclk?sa=L&ai=DC ... BBF&adurl=
Those numbers mean nothing since we don't know background noise levek in you room, or your phone's microphone sensitivity... Just to give some meaning, tell us the dB readings with the fan on and then the fan off. The difference will tell us something more about how noisy it really is (but then it will be just a very general idea).
Touche, you're right that one needs something to compare. I will do that later.Tzarls wrote: ↑Wed Mar 04, 2020 1:09 amThose numbers mean nothing since we don't know background noise levek in you room, or your phone's microphone sensitivity... Just to give some meaning, tell us the dB readings with the fan on and then the fan off. The difference will tell us something more about how noisy it really is (but then it will be just a very general idea).
The scientist in me is very proud of youLTolledo wrote: ↑Wed Mar 04, 2020 9:44 amFan test something like this:
ambient condition with the fan OFF:
same case with fan running on an RPi3B+ at the back of the monitor
and another case with same fan on an RPi4B-4G at the back of another bigger monitor just above the first small monitor.
and another AC fan for room heating is running (just 500mm below the table)
the sponge is used to dampen any other vibrations from the table that may be transferred to the phone's mic.
below is the setup: reading fluctuating between 19.6 to 21db
RPi Fan test OFF.jpg
and here is the reading when the fan is turned ON (picture taken approx 10 seconds after turned ON)
RPi Fan test ON.jpg
i guess this is still very irritatingly noisy for somebody else....
What kind, oil, grease ...? Praytell...
Grin !for those really noisy fans, due to unbalanced blade configuration.... those are "silenced permanently"....