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Torsten Ruger 2021-04-18 15:13:13 +03:00
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@ -15,16 +15,23 @@ All tested fans are on the quiet side. Some have it in the name, but they are
all under 20db under full load. Some have pwm control built in, which i am
thinking is less relevant than i thought.
In my setup i am testing with a Pi Pico and measuring with a **telephone**,
from about 50cm and 2m. So not too accurate.
In my setup i am testing with a Pi Pico and measuring with a **telephone**
(Sound Meter), from about 50cm and 2m. Not too accurate, but ok, ambient at
6-9db.
15m2 at 2.5 m height is about 20m3 / h for compliance.
Fan | mm | V | mI | Wire | rpm | m3 | db | 50cm | 2m | Notes
Fan | mm | V | mA | Wire | rpm | m3 | db | 40cm | 1m | Notes
---------|------|-----|-----|------|------|-----|----|------|-----|-----
Zephyr | 60 | 12 | 110 | 3 | 2000 | 17 | 18 | 50cm | 2m | Notes
Zephyr | 80 | 12 | 160 | 3 | 1400 | 47 | 14 | 50cm | 2m | Notes
Zephyr | 92 | 12 | 140 | 3 | 1300 | 57 | 14 | 50cm | 2m | Notes
Zephyr | 120 | 12 | 180 | 4 | 1400 | 81 | 15 | 50cm | 2m | Notes
Zephyr | 60 | 12 | 110 | 3 | 2000 | 17 | 18 | 10 | 16 | Notes
Zephyr | 80 | 12 | 160 | 3 | 1400 | 47 | 14 | 40 | 13 | Notes
Zephyr | 92 | 12 | 140 | 3 | 1300 | 57 | 14 | 45 | 14 | Notes
Zephyr | 120 | 12 | 180 | 4 | 1400 | 81 | 15 | 50cm | 2m | Zapped
## Conclusions
So far the fans ahve been surprisingly quiet. At close proximity the phone seems to pick up the air movement as noise. It was a scenario created to distinguish
the leels better, it would be impossible to get this close. An average real life
distance would be 2-3m, but at that distance all the fans a are too quiet to
measure (a good thing!)
# Decisions