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Are two fans at half rpm always more silent that one fan at full rpm?

Fresh5 days ago
Mar 15, 20262651 views
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Problem

I am new to silent pc building so if I am making some lame assumptions please correct me. For example this is claimed properties of Noctua NF-S12-1200 fan. If I recall high school physics correctly two 6dB are summed as this: So two Noctua fans running 600rpm should make considerably less noise tha…

Error Output

airflow     noise 
 1200 rpm   81 m³/h   17 dB
  600 rpm   41 m³/h   <6 dB

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New Fix – Awaiting Verification

Fix for: Are two fans at half rpm always more silent that one fan at full rpm?

Low Risk

Adding of two identical sound sources will increase the total sound power level with 3dB (source) So yes, two fans at half speed will shift the same amount of air with considerably less noise. This (with minor variations) will be true for all fans. …

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