Fan and Acoustic Noise includes acoustic specifications for Extreme 8520 switches under maximum operating conditions. Refer to the Extreme 8820 Data Sheet for up-to-date information
| Sound Pressure | Extreme 8820-40C (F-B) | Extreme 8820-40C (B-F) | Extreme 8820-80C (F-B) | Extreme 8820-80C (B-F) |
|---|---|---|---|---|
| Front | 57.3 dBA, re: 20 µPa | 61.7dBA, re: 20 µPa | 61.3 dBA, re: 20 µPa | 69 dBA, re: 20 µPa |
| Rear | 60.2 dBA, re: 20 µPa | 65.1 dBA, re: 20 µPa | 65.2 dBA, re: 20 µPa | 70.8 dBA, re: 20 µPa |
| Right | 50.5 dBA, re: 20 µPa | 54.9 dBA, re: 20 µPa | 55.5 dBA, re: 20 µPa | 62.9 dBA, re: 20 µPa |
| Left | 51.9 dBA, re: 20 µPa | 55.9 dBA, re: 20 µPa | 55.9 dBA, re: 20 µPa | 64 dBA, re: 20 µPa |
| Average | 55 dBA, re: 20 µPa | 59.4 dBA, re: 20 µPa | 59.5 dBA, re: 20 µPa | 66.7 dBA, re: 20 µPa |