The AP123 or how SilverStone’s been fooling people for years

A harsh headline, but a fair one. We always try to find mostly good things when testing, but sometimes it’s tricky. That’s the case here, where SilverStone is misleading its customers. The grille doesn’t significantly increase noise? We have no sympathy for hoaxes like this. Especially when it’s all “well thought out” and staged. Such practices do not shed a good light on the combination of three different blade shapes, which actually has something to it.

Frequency response of sound with a dust filter

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.