1/10/2024 0 Comments Reduce noise v4 do it twiceWhen looking at fan noise ratings, my general rule of thumb is that the actual noise is about 1.5x-2.0x the rated noise. Since this sound pressure (or vibration energy) can also be a catalyst for overall computer noise this is important to keep in mind. 10 fans of the same speed and size will create 10 times the vibrations as just one of those fans. What does increase in equal units is the sound pressure, or radial kinetic energy from the spinning of the fan. Regardless, adding more fans of the same noise output only marginally increases the combined noise. But to me it wouldn't make sense that if you hypothetically had two 2dB(A) fans the noise level would end up being 5dB(A). The 3dB(A) figure came from an overclocking web site. There is some question about whether it increases by 3dB(A) every time, regardless of the original fan in question, but I'm not totally sure. Two 32dB(A) fans would create about 35dB(A) of noise. Each fan increases the noise level by 10%.
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