Acoustic Declaration for VAX 4000 BA42B Systems

This document is an Acoustic Declaration for Digital's VAX 4000 BA42B Systems, published in September 1992.

It provides declared sound emission values in compliance with international standards such as ISO 9296 and ISO 7779 (and DIN 45635-19).

The document presents tables listing:

• Sound Power Level (LWAd, B) in Bels
• Sound Pressure Level (LpAm, dBA) at bystander positions

These measurements are given for both idle and operating states across different system configurations:

• The BA42B diskless system enclosure.
• A BA42B with an RF31T drive installed.
• A BA42B with an RF35 drive installed.

A note clarifies that 1 Bel equals 10 dBA, and current values for specific configurations are available from Digital representatives.