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4.6ACOUSTICS
Table
Table
| SOUND POWER | SOUND POWER |
OPERATING MODE | (MEAN) | (MEAN + 3 SIGMA) |
|
| |
|
|
|
| MAXTOR ATLAS 10K IV 73.5/147.1/300 GB | |
|
|
|
|
|
|
Idle On Track |
|
|
73.5 GB | 3.16 | 3.38 |
147.1 GB | 3.52 | 3.68 |
300 GB | 3.67 | 3.91 |
|
|
|
Seeking Random |
|
|
73.5 GB | 3.60 | 3.72 |
147.1 GB | 3.87 | 4.04 |
300 GB | 3.96 | 4.19 |
|
|
|
1.The specifications for idle and operating acoustic noise as per ISO Standard 7779, “Engineering Methods for Free Field Conditions Over a Reflecting PLane.” All specifications are sound power level maximum limits, A- weighted, referred to 1 picowatt as indicated in the standard. The drive will be mounted for the test in the manufacturer’s defined nominal position. The unit under test should be supported so that its bottom surface in the test orientation is less than or equal to 6 centimeters from the chamber floor, but not in contact with it. The unit should be supported with small, compliant,
2.The relationship between bels and dBA for sound power is 1 bel = 10dBA.
4.6.1Acoustic Toned Quality
A typical drive will have no discrete tones that exceeds a tone ratio of 8dB as measured per ECMA 74,8th Edition, December 2003.
Maxtor Atlas 10K V