http://bookmarksknot.club/story.php?title=ac-axial-fans-cooling-industrial 9. Noise Reduction Strategies in High-Speed Axial Fan Design Axial fans, particularly high-speed or high-pressure models, are inherently prone to generating noise, which presents a significant engineering challenge in commercial and industrial applications[12][18]. Fan noise is broadly categorized into two types: rotational (tonal) noise and broadband (turbulence) noise[17]. Wed, 15 Apr 2026 16:58:15 UTC en