标准摘要
[中文适用范围]： 本文件规定了计算弹丸声的声源级及其三分之一倍频带谱的方法，该声源级以12.5 Hz至10 kHz范围内的标称中频带频率对应的声暴露级表示。文件还规定了如何利用该声源级计算接收点处的声暴露级的方法。利用本文件获得的结果可作为评估射击场弹丸声的基础。此外，这些数据还可用于确定不同类型弹药和武器的声发射或声入射。预测方法适用于户外条件和直线弹道。文件给出了两种计算声源级的方法：一种适用于流线型弹丸形状，另一种适用于非流线型形状（如弹丸）。 [外文原描述]： This document specifies computational methods for determining the acoustical source level of projectile sound and its one-third octave band spectrum, expressed as the sound exposure level for nominal mid-band frequencies from 12,5 Hz to 10 kHz. It also specifies a method on how to use this source level to calculate the sound exposure level at a receiver position. Results obtained with this document can be used as a basis for assessment of projectile sound from shooting ranges. Additionally, the data can be used to determine sound emission or immission from different types of ammunition and weapons. The prediction methods are applicable to outdoor conditions and straight projectile trajectories. Two computational methods are given to determine the acoustical source level: one for streamlined projectile shapes and one for non-streamlined shapes, such as pellets.
英文名称Acoustics — Noise from shooting ranges — Part 4: Calculation of projectile sound