SilentiumPC Fluctus 120 PWM: “Miracle” fan from the Fera 5

Cooling, Extra tests, Fans | | Ľubomír Samák

Results: Frequency response of sound with a radiator

SilentiumPC presents the Fluctus 120 PWM as its very best fan. But, to beat the whirring Sigma Pro 120 PWM and the obviously sketchy Sigma Pro Corona RGB 120 is relatively simple. The company’s marketing, however, talks about psychoacoustic optimizations. And while there’s no reason to smirk (psychoacoustics is a legitimate scientific field), there were some imperfections that the Poles didn’t avoid.

Results: Frequency response of sound with a radiator

Measurements are performed in the TrueRTA application, which records sound in a range of 240 frequencies in the recorded range of 20–20,000 Hz. For the possibility of comparison across articles, we export the dominant frequency from the low (20–200 Hz), medium (201–2,000 Hz) and high (2,001–20,000 Hz) range to standard bar graphs.

However, for an even more detailed analysis of the sound expression, it is important to perceive the overall shape of the graph and the intensity of all frequencies/tones. If you don’t understand something in the graphs or tables below, you’ll find the answers to all your questions in this article. It explains how to read the measured data below correctly.

Noise levels in the tables below -87 dBu (but watch out for the negative sign, -70 dBu is louder than -80 dBu) can be ignored. They are in fact extremely weak and always far below the limit of human perception, and are often defined by the “noise” of the measurement string. Therefore, do not take even the dominant frequencies within the treble band that exceed 12 kHz too much into account.

Note: For these measurements a thinner radiator of 28 mm is used. Such thickness (and restrictiveness with FPI 22) is common in practice (also within AIO coolers).







Why is there a missing value sometimes? There may be more reasons. Usually it is because the fan could not be adjusted to the target noise level. Some have a higher minimum speed (or the speed is low, but the motor is too noisy) or it is a slower fan that will not reach the higher decibels. But the results in the graphs are also missing if the rotor is brushing against the nylon filter mesh. In that case, we evaluate this combination as incompatible. And zero in the graphs is naturally also in situations where we measure 0.00. This is a common occurrence at extremely low speeds with obstructions or within vibration measurements.


  •  
  •  
  •  
Continue:
Flattr this!

Related articles

Enermax contest bonus: You’ll also get fans with the PSU

Giveaway, News | | Editors

The ongoing contest for Enermax PSUs is now even more attractive. You can also enter for fans, which we will be happy to add to the package for the winner. And also for free. In their case, we don’t even require them to be paired with the main build (with the Enermax PSU). You can use them as you see fit in some other computer where they will do a better job than gathering dust on the shelves of our testlab. Read more “Enermax contest bonus: You’ll also get fans with the PSU” »

  •  
  •  
  •  

In the works: Trilogy of different Arctic P14 variant tests

Cooling, Fans, Preview | | Ľubomír Samák

Slowly but surely, the Arctic P14 fan tests are coming up. In a short time sequence we will analyze all models that differ from each other more than the color design. After testing the base model, we’ll look at how the use of ball bearings (instead of fluid bearings) affects the results, culminating with the P14 Max framed impeller. That this fan must be the most efficient? Not necessarily. Read more “In the works: Trilogy of different Arctic P14 variant tests” »

  •  
  •  
  •  

BeQuiet! put all their modern fans in white

Cooling, Fans, News | | Ľubomír Samák

Both 120 and 140 mm BeQuiet! fans from the Silent Wings (Pro) 4 and Pure Wings 3 series are now available in an all-white design. So both more expensive and cheaper fans, which have in common a very high airflow per unit of noise. Across the entire price spectrum, you are dealing with some of the most efficient fans you can buy for computers. And not just among the white ones. Read more “BeQuiet! put all their modern fans in white” »

  •  
  •  
  •  

Leave a Reply

Your email address will not be published. Required fields are marked *