AS ISO 9296:2019 PDF
The objective of this Standard is to provide acoustical noise emission data for information technology and telecommunications equipment (ITT equipment) to allow users, planners, manufacturers and authorities to compare noise emissions from different products, for installation acoustic planning and workplace noise immission requirements.
The uniform methods in this document use the noise emission data obtained in accordance with ISO 7779, and the declaration and verification procedures detailed in ISO 4871 and ISO 7574-4.
The basic noise emission values to be declared are the declared mean A-weighted sound power levels, LWA,m. Optionally, the declared mean A-weighted emission sound pressure levels at the operator or bystander positions, LpA,m, can be declared. These are arithmetic mean values based upon measurements on a random sample of equipment of the batch, in accordance with ISO 7779.
For verification purposes, an additional quantity is required to be declared: the statistical adder for verification, Kv. This is a quantity that is added to the declared mean A-weighted sound power level, LWA,m, and used in the verification section of this document to provide a consistent and predictable probability of acceptance for the batch of equipment.
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