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Stepped Inlet Design

Noctua’s Stepped Inlet Design is an advanced aerodynamic design measure first introduced with the NF-F12 fan. By adding turbulence to the fan’s influx, the Stepped Inlet Design facilitates the transition from laminar to turbulent flow. This measure has an effect similar to the dimple structure of a golf ball in so far as it leads to better flow attachment to the frame, which allows the impeller to suck in more air and hence improves overall airflow efficiency.


Stepped Inlet Design


In addition to these aerodynamic benefits, the Stepped Inlet Design also reduces tonal intake noises caused by laminar inflow due to it being transformed to turbulent flow, which produces a more broadband noise profile. This way, the Stepped Inlet Design helps to refine the fan’s acoustic qualities by letting it blend into the background noise more easily and making it more agreeable to the human ear.


Noctua
29.10.2014 - Tweaks.pl NF-F12 industrialPPC-2000 PWM
Test verdict: "Poza tym wentylator zachował wszystkie cechy NF-F12, dlatego otrzymuje od nas ocenę 5/5 oraz dwie rekomendacje, po raz pierwszy wśród wentylatorów w kategorii jakość oraz doskonała wydajność." (Marcin Żyto, Tweaks.pl)
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29.10.2014 - Micougnou.com NF-F12 industrialPPC-2000 PWM
Test verdict: "C'est du lourd. Les performances sont excellentes" (Nicolas Henriques, Micougnou.com)
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29.10.2014 - modding.fr NF-A4x10 5V
Test verdict: "La série A n’entache en rien la réputation de Noctua, bien au contraire elle la sublime! Les performances collent proportionnellement aux dimensions des ventilateurs et avec un travail efficace sur le niveau sonore. Les optimisations présentes sur le cadre tout comme les pales, mais aussi au niveau du moteur et du roulement, contribuent à cette efficacité tant au niveau performance que sonore." (Bertrand Curras, modding.fr)
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29.10.2014 - PCReviews.es NF-P14s redux-1500 PWM
Test verdict: "Los ventiladores Noctua Redux tienen un magnífico rendimiento, gran diseño y son muy silenciosos, además son muy económicos. ¿Qué más se puede pedir de unos ventiladores?" (David Diaz Villa, PCReviews.es)
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