Acoustics. Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices - Structure-borne vibration measurements has-tracked-changes or “LL” friction level designed

or “LL” friction level designed to be fitted to tread braked rail vehicles

- if appropriate

from 1/8 in (3

BS EN ISO 21809-5 specifies the requirements for qualification

Acoustics. Measurement of airborne noise emitted and structure-borne vibration induced by small air-moving devices - Structure-borne vibration measurements has-tracked-changes or “LL” friction level designed1 Scope This part of ISO 10302 covers vibration levels from small air moving devices (AMDs) with mounting footprints of less than 0,48 m 0,90 m for the full size test plenum defined in ISO 10302 1 and less than 0,18 m 0,3 m for the half size plenum. It covers all types of AMDs which can be mounted on, and are self supported at, the discharge or inlet plane of a test plenum box as specified in ISO 10302 1. The procedures defined in this part of ISO