HP A4500A - VMEbus Single Board Computer 744 Motherboard Hardware Manual page 39

Acoustic Safety Standards
The acoustic specifications for the rp24xx server are as follows:
Sound power level
Sound pressure level at operator position
Reducing Acoustic Noise Levels
Ambient noise level in a computer room or office environment can be reduced by the following means:
• Dropped ceiling—Cover with a commercial grade of fire-resistant, acoustic rated, fiberglass ceiling tile.
• Sound deadening—Cover the walls with curtains or other sound deadening material.
• Removable partitions—Foam rubber models reduce noise levels the best.
Chapter
6.4 Bels LWA
58.2 dB LPA
Acoustic Safety Standards
47