The results indicate that the directivity of the new eletric horn has been improved and the environment and safty requirements can be satisfied. 结果表明，在安全示警的条件下，新型非制式电笛的指向性得到有效改善，能够满足环保和安全示警的双重要求。
To improve the directivity of locomotive electric horns, a new nonstandard electric horn has been trial-produced and tested on the static and dynamic conditions. 在此基础上优化试制了新型非制式电笛，并在静态和动态条件下，对其指向性进行了实验测试与分析。
