BS EN ISO 17201-2:2006

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
  3.1 General
  3.2 Directivity
  3.3 Energy
  3.4 Fraction
  3.5 Projectile
4 Estimation model for source data of the muzzle blast
  4.1 General
  4.2 Estimation of chemical energy
  4.3 Estimation of acoustic energy
  4.4 Estimation of the Weber energy
  4.5 Estimation of directivity
  4.6 Estimation of the spectrum
5 Estimation model for projectile sound
  5.1 General
  5.2 Estimation of projectile sound source energy
6 Sound exposure
7 Uncertainty of estimation
Annex A (informative) Simple blast model for estimation of
                      sound energy and its spectrum
Annex B (informative) Quality of input data
Annex C (informative) Examples for estimation of muzzle blast
Annex D (informative) Estimation of sound exposure of projectile
                      according to Figure 3 flowchart - Example
Bibliography

Specifies methods for estimating the acoustic source data of muzzle blast and explosions and the source data of projectile sound on the basis of non-acoustic data for firearms with calibres less than 20 mm and explosions less than 50 g TNT equivalent.

This part of ISO17201 specifies methods for estimating the acoustic source data of muzzle blast and explosions and the source data of projectile sound on the basis of non-acoustic data for firearms with calibres less than 20mm and explosions less than 50g TNT equivalent.

This part of ISO17201 addresses those cases where no source measurements exist or where the data necessary to calculate projectile sound according to ISO17201-4 are unknown. An example of this situation would be measuring projectile sound from shot guns pellets. This part of ISO17201 can also be used as an interpolation method between measurements of muzzle blast.

Source data are given in terms of spectral angular source energy covering the frequency range from 12,5Hz to 10kHz and can be used as data input for sound propagation calculation.

This part of ISO17201 is not applicable to the prediction of sound levels for the assessment of hearing damage and cannot be used to predict sound pressure levels or sound exposure levels below a specific distance where linear acoustics does not apply.