oSIST prEN ISO 17201-2:2024

SLOVENSKI STANDARD
01-september-2024
Akustika - Hrup strelskih poligonov - 2. del: Izračun potisnega poka (ISO/DIS 17201
-2:2024)
Acoustics - Noise from shooting ranges - Part 2: Calculation of muzzle blast (ISO/DIS
17201-2:2024)
Akustik - Geräusche von Schießplätzen - Teil 2: Berechnung des Mündungsknalls
(ISO/DIS 17201-2:2024)
Acoustique - Bruit des stands de tir - Partie 2: Calcul de la détonation à la bouche
(ISO/DIS 17201-2:2024)
Ta slovenski standard je istoveten z: prEN ISO 17201-2
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
95.020 Vojaštvo na splošno Military in general
97.220.10 Športni objekti Sports facilities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 17201-2
ISO/TC 43/SC 1
Acoustics — Noise from shooting
Secretariat: DIN
ranges —
Voting begins on:
Part 2: 2024-06-17
Calculation of muzzle blast
Voting terminates on:
2024-09-09
ICS: 97.220.10; 95.020; 17.140.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
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Reference number
ISO/DIS 17201-2:2024(en)
DRAFT
ISO/DIS 17201-2:2024(en)
International
Standard
ISO/DIS 17201-2
ISO/TC 43/SC 1
Acoustics — Noise from shooting
Secretariat: DIN
ranges —
Voting begins on:
Part 2:
Calculation of muzzle blast
Voting terminates on:
ICS: 97.220.10; 95.020; 17.140.20
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 17201-2:2024(en)
ii
ISO/DIS 17201-2:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 General .1
3.2 Directivity . .3
3.3 Energy .3
3.4 Fraction .4
3.5 Projectile .5
4 Estimation model for source data of the muzzle blast . 5
4.1 General .5
4.2 Estimation of chemical energy .5
4.3 Estimation of acoustic energy . .6
4.4 Estimation of the Weber energy .6
4.5 Estimation of directivity .6
4.6 Estimation of the spectrum .6
5 Uncertainty of estimation . 7
6 Report . 8
Annex A (informative) Simple blast model for estimation of sound energy and its spectrum . 9
Annex B (informative) Quality of input data.11
Annex C (informative) Comparison between measurements and prediction of muzzle blast . 14
Bibliography .21

iii
ISO/DIS 17201-2:2024(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 211,
Acoustics, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 17201-2:2006), which has been technically
revised.
The main changes are as follows:
— deletion of Clause 5 and 6, and Annex D which were moved to ISO 17201-4
— revision of Clause 7 and Annex C
— addition of Clause 6
— editorial revision of the document
A list of all parts in the ISO 17201 series can be found on the ISO website.
The initiative to prepare a standard on impulse noise from shooting ranges was taken by AFEMS, the
Association of European Manufacturers of Sporting Ammunition, in April 1996, by the submission of a
formal proposal to CEN. After consultation in CEN in 1998, CEN/TC 211, Acoustics, asked ISO/TC 43/SC 1,
Noise, to prepare the ISO 17201 series.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
ISO/DIS 17201-2:2024(en)
Introduction
There are two basic sources that dominate the shooting sound from firearms: the muzzle blast and the
projectile sound. These two sources are basically different. The explosion blast from devices can be treated
as muzzle blast. This document describes the calculation of muzzle blast. The calculation of projectile sound
is described in part 4 of the ISO 17201 series.
The muzzle blast is caused by the expanding gases of the propellant at the muzzle. The muzzle blast can be
modelled approximately based on a spherical volume of these gases at that moment when the expansion
speed becomes subsonic.
In general, the procedures for estimating the muzzle blast rely on the estimation of energies that are
involved in the related processes. The procedures give estimates for the fraction of these energies that
transforms into acoustic energy. The results of the estimation are acoustical source data with respect to
energy, direction and frequency content.

v
DRAFT International Standard ISO/DIS 17201-2:2024(en)
Acoustics — Noise from shooting ranges —
Part 2:
Calculation of muzzle blast
1 Scope
This document specifies a computational method (in line with ISO 17201-4) for estimating the acoustic
source data of muzzle blast and explosions on the basis of non-acoustic data for firearms with calibres less
than 20 mm and explosions less than 50 g TNT equivalent.
This document addresses those cases where no source measurements exist. This document 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 12,5 Hz
to 10 kHz and can be used as data input for sound propagation calculation.
This document is not applicable to the prediction of sound levels for the assessment of hearing damage;
neither can it be used to predict sound pressure levels nor sound exposure levels at distances where linear
acoustics do not apply.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
...