Abstract
Acoustical output from air movers in computing systems can reach sufficiently high sound pressure levels and in frequency bands such that performance of Hard Disk Drives (HDD) is degraded. In this paper air mover acoustical characteristics and comparisons to standalone measurements and models relevant to the performance issues are explored. Sound pressure levels, frequency bands, directivity, and explicit source descriptions are considered for air mover sources, and duct transmission, statistical energy, acoustic diffusion, and measured transfer factors are considered for noise transmission along acoustic path(s) from air mover to HDD within computing systems.
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