ISO 17201-1:2005 pdf download.Acoustics — Noise from shooting ranges — Part 1: Determination of muzzle blast by measurement.
5 Basic concept for measurement and analysis
5.1 General
For the measurement of the muzzle blast, it is assumed that radiation of sound is rotationally symmetrical around the line of fire, This assumption is used to define spherical coordinates, tm’ a and fiwhicti are centred at the muzzle The angles are defined in CLause 3 and are shown in Figure 3.
As the muzzle blast can be directional, measurements may be carried out in a circle. The goal is to measure the level and also the directivity pattem An equal distance between measuring points makes it easier to use interpolation algorithms to get a continuous function for directivity pattern.
The measurements and the analyses shall yield spectral information In at least octave bands (preferably In one-third-octave-bands) from 31,5 Hz to 8 kIt
The calculation method given In 5-2 to 56 applies to broadband analysis as well as octave-band or one-third- octave-band analysis.
5.1 General
For the measurement of the muzzle blast, it is assumed that radiation of sound is rotationally symmetrical around the line of fire, This assumption is used to define spherical coordinates, tm’ a and fiwhicti are centred at the muzzle The angles are defined in CLause 3 and are shown in Figure 3.
As the muzzle blast can be directional, measurements may be carried out in a circle. The goal is to measure the level and also the directivity pattem An equal distance between measuring points makes it easier to use interpolation algorithms to get a continuous function for directivity pattern.
The measurements and the analyses shall yield spectral information In at least octave bands (preferably In one-third-octave-bands) from 31,5 Hz to 8 kIt
The calculation method given In 5-2 to 56 applies to broadband analysis as well as octave-band or one-third- octave-band analysis.
