Results: frequency response of sound
After analyzing the nylon and plastic dust filter, we now add a test of the “foam” dust filter. The latter has a slightly more complex construction. It consists of several parts and is kind of like a jigsaw puzzle, the elements of which even improve the aerodynamics in some ways. We go through everything in detail, and although we approached this type of filter with a bit of a bias, it comes out in a good light in the end. Is a foam dust filter better than a nylon one?
Sound colour
Type of obstacle | Dominant sound freq. and noise level, Noctua NF-A12x25 PWM@7 V | NF-F12 PWM | NF-A15 PWM | ||||
Low range | Mid range | High range | |||||
Frequency [Hz] | Noise level [dBu] | Frequency [Hz] | Noise level [dBu] | Frequency [Hz] | Noise level [dBu] | ||
Foam dust filter | 195,849 | -74,563 | 339,028 | -75,905 | 19330,546 | -90,764 | |
Hexagonal grille | Hexagonal grid | 126,992 | -77,806 | 339,028 | -69,128 | 1974,030 | -89,846 |
Circular grille | 20,306 | -76,419 | 201,587 | -69,415 | 18780,243 | -90,922 | |
Plastic dust filter | 126,992 | -68,642 | 339,028 | -74,269 | 5583,400 | -89,100 | |
Nylon dust filter | Nylon dust filter | 195,849 | -63,331 | 201,587 | -62,790 | 1974,030 | -90,464 |
No obstacle | Plastic dust filter | 130,713 | -77,289 | 339,028 | -74,287 | 1974,030 | -90,361 |
- Contents
- Grille, foam, grille
- Results: impact on airflow, pressure and noise
- Results: frequency response of sound
- Not enough for perfection, but…