IBM 3409-A00, Appliance Manual, Page: 15 / 56

Table 1. Declared noise emissions in accordance with ISO 9296
(1,2,3)
(continued)
Product description Declared A-Weighted
Sound Power Level,
L
WAd
(B)
Declared A-Weighted
Sound Pressure Level,
L
pAm
(dB)
Operating Idling Operating Idling
Notes:
1. Declared level L
WAd
is the upper-limit A-weighted sound power level; Declared level L
pAm
is the mean
A-weighted sound pressure level measured at the 1-meter bystander positions.
2. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
3. B, dB, abbreviations for bels and decibels, respectively. 1 B = 10 dB.
4. Notice: Government regulations (such as those prescribed by OSHA or European Community
Directives) may govern noise level exposure in the workplace and may apply to you and your server
installation. This IBM system is available with an optional acoustical door feature that can help
reduce the noise emitted from this system. The actual sound pressure levels in your installation
depend upon a variety of factors, including the number of racks in the installation; the size, materials,
and configuration of the room where you designate the racks to be installed; the noise levels from
other equipment; the room ambient temperature, and employees' location in relation to the
equipment. Further, compliance with such government regulations also depends upon a variety of
additional factors, including the duration of employees' exposure and whether employees wear
hearing protection. IBM recommends that you consult with qualified experts in this field to
determine whether you are in compliance with the applicable regulations.
Safety and environmental notices xv