The results of the experimental tests have confirmed the correctness of the inversive method of determination of emission sound pressure levels. The emission sound pressure levels values, obtained as a result of carrying out the inversive method, are consistent with the level values obtained following the methods specified in the European Standard series EN ISO 11200. The inversive method allows to determine the emission sound level distribution around the real sources, with the use of relatively low number of the substitute sources with the simplest radiation directive characteristics. Even in case of sound sources with complicated radiation characteristics, the model accuracy is usually satisfactory. It should be also noted that the optimum position of the substitute sources (according to the algorithm illustrated in Fig. 1) is usually connected with the location of the sound sources in a machine. In addition, the method, the authors have worked out, allows easy predication of the emission sound pressure level as a function of the distance between a work station and a machine. Also the emission index allows predication, but in the field of the machine acoustic safety. The acoustic assessment of a machine carried out only according to the rules specified in the Machinery Directive no 98/3 7/EC, by determination of the emission sound pressure level only and, possibly, the acoustic power level, does not make it possible to carry out complete acoustic assessment of a machine, i.e. it is impossible to state whether the admissible value of the A-weighted sound pressure level will be exceeded at the work station under the operating conditions or not. However, such assessment is possible by applying the emission index.
展开▼
机译：实验测试的结果证实了测定发射声压水平的反转方法的正确性。作为执行反转方法而获得的发射声压水平值与欧洲标准系列EN ISO 11200中指定的方法获得的水平值一致。逆转方法允许确定周围的发射声级分布实际来源，随着使用相对较低的替代源与最简单的辐射指示特性。即使在具有复杂辐射特性的声源的情况下，模型精度通常是令人满意的。还应该注意的是，替代源的最佳位置（根据图1中所示的算法）通常与机器中的声源的位置连接。此外，作者已经制定了该方法，可以轻松地预测发射声压水平作为工作站和机器之间的距离的函数。发射指数也允许预测，但在机器声学安全领域。仅根据机械指令NO 98/3 7 / EC中指定的规则执行的机器的声学评估，通过确定发射声压水平，可能是声功率水平，不能使其成为可能对机器进行完整的声学评估，即不可能说明在操作条件下的工作站是否超过了允许的A加权声压级的可允许值。但是，通过施加排放指数，可以进行这种评估。
展开▼
