ISO 7779:2018 PDF Download

A standard called ISO 7779:2018 describes how to measure and report the airborne noise that telecommunications and information technology equipment emits. It is based on many fundamental noise emission criteria and is regarded as a component of a noise test code. The A-weighted sound power level serves as the primary criterion for comparison and enables the comparison of devices of the same kind made by several manufacturers or by different types of devices.

The standard offers three methods—each employing a different measuring standard—for calculating sound power levels in order to account for testing facilities and expertise that vary. The A-weighted emission sound pressure level at the operator's or bystander's place is also taken into consideration, which aids in identifying potential problems that may annoy, impede activities, or harm hearing.

The methods for identifying notable discrete tones in noise emission are described in Annex D of the standard. For type tests, ISO 7779:2018 is appropriate because it enables both producers and testing facilities to achieve comparable findings. The standard is applicable to machinery that produces impulsive, discrete-frequency, broad-band, or narrow-band noise.

The obtained sound pressure and sound power levels can be used for comparison and noise emission declaration purposes, but they are not meant to reflect the noise emission levels of an installation. They are still useful for planning installations, though. Sound power levels can be utilized to calculate statistical values for a production series if they are established for numerous units.