Home > Servers > PowerEdge Components > White Papers > Dell 15G PowerEdge Acoustical Experience and Dependencies > Overview
Dell PowerEdge servers are designed to deliver an acoustical experience suitable for your environment and usage. Four design principles guide development to achieve this objective:
Several acoustical metrics are measured and balanced to achieve the desired acoustical experience, including: Sound power level, sound pressure level, sound quality, and transient acoustical response. A-weighted sound power level and A-weighted sound pressure level are measures of the amplitude of sound. Comparisons of A-weighted sound pressure levels to some familiar noise sources are given in Table 1 for common reference. Sound quality refers to psychoacoustical metrics that attempt to capture the human response to a sound associated with product health, annoyance, distraction, or pleasure. The presence of prominent tones, as defined in ECMA-74, is one example of a sound quality metric. Transient response refers to changes with time; for example, response to CPU-intensive workload or when a system is turned on or off. More discussion of Dell PowerEdge acoustical design and metrics is available in the white paper Dell Enterprise Acoustics.
Equivalent familiar noise experience | Value measured at your ears LpA (dBA re 20 µPa) |
Loud concert | 90 |
Data center, vacuum cleaner, voice must be elevated to be heard | 75 |
Conversation levels | 60 |
Whispering, open office layout, normal living room | 45 |
Quiet office | 35 |
Quiet library | 30 |
Recording studio | 20 |