本文件已被宣布为“稳定”，不再接受货币定期审查。用户负责验证参考资料和持续适用性或技术要求。新技术可能存在。SAE ARP 876C提供了一种预测喷气式飞机排气噪声主要成分的方法。这是不完整的，因为没有推荐的无冲击同轴流方法。如ARP 876C附录（附录C）所述，缺乏推荐的方法反映了在试图令人满意地关联自1970年代中期以来可用的数据时遇到的困难。 在此期间，SAE A-21飞机噪音委员会的燃气轮机推进小组委员会对三种提议的方法进行了审查，没有一种获得了必要的支持，以允许在ARP 876C中发布。因此，发布该空气是为了向那些希望预测涡扇发动机排气噪声的人提供小组委员会迄今为止考虑的主要候选程序。

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.SAE ARP 876C provides a method for predicting major elements of the exhaust noise of a jet. It is incomplete in that no recommended method for shock-free coaxial flows is included. As discussed in the Addendum (Appendix C) to ARP 876C, the lack of a recommended method reflects the difficulties incurred in attempting to correlate satisfactorily data that have become available since the mid 1970s. During that period, three proposed methods were reviewed by the Gas Turbine Propulsion Subcommittee of the SAE A-21 Aircraft Noise Committee, none of which received the necessary level of support to allow publication in ARP 876C. Accordingly this AIR is issued to make available to those wishing to predict turbofan exhaust noise the main candidate procedures thus far considered by the Subcommittee.