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Acoustical Noise 17.6 dB(A) Acoustical Noise with L.N.A. 13.1 dB(A) Acoustical Noise with U.L.N.A. 7.9 dB(A)
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The NF-B9's highly-optimized blade design achieves an exceptional level of airflow and static pressure that most other fans can only reach at much higher speeds. Beveled blade tips, Vortex-Control Notches as well as Noctua's SCD drive system and premium-grade SSO-Bearing ensure outstanding quietness and long-term stability.
Bevelled Blade TipsDue to advanced design measures like the beveled blade tips, the NF-B9 is surprisingly quiet despite its outstanding airflow and pressure performance.
Vortex-Control NotchesPsychoacoustic optimizations like the Vortex-Control Notches make the NF-B9's noise pattern more pleasant to the human ear.
Smooth Commutation DriveThe new SC drive system reduces torque variations and thereby ensures improved running smoothness, particularly at lower speeds.
Self-stabilizing Oil-pressure BearingNoctua's well proven SSO-Bearing technology guarantees supremely quiet operation and exceptional long-term stability.