Declared noise emissions

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Declared noise emissions in accordance with ISO 9296(1-5)

Table 1. Declared noise emissions in accordance with ISO 9296(1-5)
Product description

Models: A10, C10, M10, J10, J11 & J12

 Declared A-weighted

sound power level,

LWA,m(B)

 Declared A-Weighted

Sound Pressure Level,

LpA,m (dB)

 Statistical adder for verification

Kv (B)
Operating Idling Operating Idling Operating Idling

Typical Configuration:

23 ± 2 degrees C, 500m

 7.1(6) 7.1(6) 60 60 0.3 0.3

Maximum configuration:

27 degrees C, 500m

 7.3(6) 7.3(6) 60 60 0.3 0.3

Maximum configuration:

Worst-case ambient Fan failure

 8.7(6) 8.7(6) 74 74 0.3 0.3
Notes:
  1. Declared level LWA,m is the upper-limit A-weighted sound power level; Declared level LpA,m is the mean A-weighted sound pressure level measured at the 1-meter bystander positions.
  2. The statistical adder for verification, Kv, is a quantity to be added to the declared mean A-weighted sound power level, LWA,m such that there will be a 95% probability of acceptance, when using the verification procedures of ISO 9296, if no more than 6.5% of the batch of new equipment has A-weighted sound power levels greater than (LWA,m + Kv).
  3. The quantity LWAc (formerly called LWAd), can be computed from the sum of LWA,m and Kv.
  4. All measurements made in conformance with ISO 7779 and declared in conformance with ISO 9296.
  5. B, dB, abbreviations for bels and decibels, respectively. 1 B = 10 dB.
  6. Note: 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. 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.