本文件规定了通过转换根据ISO 17208-1在深水中获得的辐射噪声级值来计算等效单极源电平的方法。文中还给出了根据特定水听器几何形状在深水中进行的测量直接计算的程序。通过本文件中的程序计算的源电平是指定标称源深度下的等效单极子源电平，且仅适用于宽边方向。标称震源深度应与等效单极横向震源电平值一起报告。

This document specifies methods for calculating an equivalent monopole source level by converting radiated noise level values obtained in deep water according to ISO 17208-1. Procedures are also given for direct calculation from measurements made in deep water with specific hydrophone geometry. The source level calculated by the procedure in this document is that of an equivalent monopole source at a specified nominal source depth, and for broadside aspect only. The nominal source depth is intended to be reported with the equivalent monopole broadside source level value.