ISO 20233-1:2018规定了船舶设计中螺旋桨空化噪声评估的模型试验方法。 该过程包括噪声源的再现、噪声测量、后处理和缩放。目标噪声源是螺旋桨空化。因此，本文件描述了根据模型和船舶之间的相似定律再现船舶空化模式的试验装置和条件。螺旋桨噪声分三个阶段测量。每个阶段的测量目标是螺旋桨空化噪声、背景噪声和传输损耗。对于源级评估，背景噪声和传输损耗的修正适用于测量的螺旋桨空化噪声。 最后，根据模型比例尺结果，使用比例定律估算全比例尺源水平。

ISO 20233-1:2018 specifies a model test method for propeller cavitation noise evaluation in ship design. The procedure comprises reproduction of noise source, noise measurements, post processing and scaling. The target noise source is propeller cavitation. Thus, this document describes the test set-up and conditions to reproduce the cavitation patterns of the ship based on the similarity laws between the model and the ship. The propeller noise is measured at three stages. The measurement targets for each stage are propeller cavitation noise, background noise, and transmission loss. For the source level evaluations, corrections for the background noise and the transmission loss are applied to the measured propeller cavitation noise. Finally, the full-scale source levels are estimated from the model scale results using a scaling law.