oSIST prEN ISO 17201-4:2024
(Main)Acoustics - Noise from shooting ranges - Part 4: Calculation of projectile sound (ISO/DIS 17201-4:2024)
Acoustics - Noise from shooting ranges - Part 4: Calculation of projectile sound (ISO/DIS 17201-4:2024)
ISO 17201-4:2006 provides a computational model 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 gives guidance on how to use this source level to calculate the sound exposure level at a receiver position.
ISO 17201-4:2006 is intended for calibres of less than 20 mm, but can also be applied for large calibres. Additionally, the data can be used to compare sound emission from different types of ammunition used with the same weapon. This part of ISO 17201 is meant for weapons used in civil shooting ranges, but is also applicable to military weapons.
Akustik - Geräusche von Schießplätzen - Teil4: Berechnung des Geschossgeräusches (ISO/DIS 17201-4:2024)
Dieser Teil von ISO 17201 stellt ein Rechenmodell zur Bestimmung des Schallpegels des Geschossgeräusches und dessen Terzspektrum, ausgedrückt als Schallexpositionspegel für Bandmittenfrequenzen von 12,5 Hz bis 10 kHz, bereit. Außerdem werden Leitlinien angegeben, wie dieser Quellpegel zur Berechnung des Schallexpositionspegels am Empfangsort angewendet werden kann.
Dieser Teil von ISO 17201 ist für Kaliber unter 20 mm bestimmt. Dieser Teil kann jedoch auch bei großen Kalibern angewendet werden. Außerdem können die Daten genutzt werden, um die Schallemission unterschiedlicher Munitionsarten zu vergleichen, die in derselben Waffe verwendet werden. Dieser Teil von ISO 17201 ist für Waffen vorgesehen, die auf zivilen Schießplätzen eingesetzt werden, sie kann jedoch auch auf Militärwaffen angewendet werden.
Das Berechnungsverfahren kann als Grundlage für Untersuchungen zur Bewertung von Umgebungsgeräuschen angewendet werden.
Das Prognoseverfahren gilt im Freien, gerade Geschossflugbahnen und stromlinienförmige Projektile. Auf Grund der letztgenannten Bedingung kann die Norm nicht auf Schrote angewendet werden. Die in diesem Teil von ISO 17201 verwendeten Parameter Standardwerte sind für eine Temperatur von 10 °C, eine relative Feuchte von 80 % und einen Druck von 1 013 hPa angegeben. Anhang A kann für Berechnungen bei anderen atmosphärischen Bedingungen angewendet werden. Besonders bei Kalibern unter 20 mm herrschen im Spektrum hochfrequente Komponenten vor. Da die Luftabsorption bei diesen Frequenzkomponenten relativ hoch ist, werden die Berechnungen in Terzbändern durchgeführt, um ein genaueres Ergebnis für die Luftabsorption zu erhalten.
Acoustique - Bruit des stands de tir - Partie 4: Calcul du bruit du projectile (ISO/DIS 17201-4:2024)
L'ISO 17201-4:2006 fournit un modèle de calcul permettant de déterminer le niveau d'émission acoustique du bruit du projectile et son spectre de tiers d'octave exprimé en tant que niveau d'exposition sonore pour des fréquences nominales à mi-bande comprises entre 12,5 Hz et 10 kHz. Elle donne également des lignes directrices sur la manière d'utiliser ce niveau d'émission pour calculer le niveau d'exposition sonore à l'emplacement du récepteur.
L'ISO 17201-4:2006 traite des calibres de moins de 20 mm, mais elle est également applicable à de plus gros calibres. Par ailleurs, les données peuvent permettre de comparer l'émission sonore de différents types de munitions utilisés avec la même arme. L'ISO 17201-4:2006 est destinée aux armes utilisées dans les stands de tir civils mais peut également s'appliquer aux armes militaires.
Akustika - Hrup strelskih poligonov - 4. del: Izračun zvoka izstrelka (ISO/DIS 17201-4:2024)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Akustika - Hrup strelskih poligonov - 4. del: Izračun zvoka izstrelka (ISO/DIS 17201
-4:2024)
Acoustics - Noise from shooting ranges - Part 4: Calculation of projectile sound (ISO/DIS
17201-4:2024)
Akustik - Geräusche von Schießplätzen - Teil4: Berechnung des Geschossgeräusches
(ISO/DIS 17201-4:2024)
Acoustique - Bruit des stands de tir - Partie 4: Calcul du bruit du projectile (ISO/DIS
17201-4:2024)
Ta slovenski standard je istoveten z: prEN ISO 17201-4
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 17201-4
ISO/TC 43/SC 1
Acoustics — Noise from shooting
Secretariat: DIN
ranges —
Voting begins on:
Part 4: 2024-06-17
Calculation of projectile sound
Voting terminates on:
2024-09-09
ICS: 95.020; 97.220.10; 17.140.20
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Reference number
ISO/DIS 17201-4:2024(en)
DRAFT
ISO/DIS 17201-4:2024(en)
International
Standard
ISO/DIS 17201-4
ISO/TC 43/SC 1
Acoustics — Noise from shooting
Secretariat: DIN
ranges —
Voting begins on:
Part 4:
Calculation of projectile sound
Voting terminates on:
ICS: 95.020; 97.220.10; 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.
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BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
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Published in Switzerland Reference number
ISO/DIS 17201-4:2024(en)
ii
ISO/DIS 17201-4:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Projectile sound . 5
4.1 Introduction .5
4.2 Regions .5
4.3 The spectrum of an N-wave .6
5 Source description . 7
5.1 Source point .7
5.2 Source sound exposure level for streamlined projectiles.7
5.3 Source sound exposure level for non-streamlined projectiles .8
5.4 Spectrum of the source sound exposure level .11
6 Calculating the sound exposure level at a receiver location .12
6.1 Basic formula . 12
6.2 Calculation of the attenuation terms . 12
6.2.1 Geometric attenuation . 12
6.2.2 Non-linear attenuation . .14
6.2.3 Non-linear shift of the spectrum . 15
6.2.4 Atmospheric absorption, excess attenuation and barrier effects . 15
7 Uncertainty in source description and propagation .16
7.1 Uncertainties in source description .17
7.2 Uncertainties in determining the sound exposure level at a receiver location .19
Annex A (informative) Derivation of constants and consideration of barrier and other effects .20
Annex B (informative) Calculation of projectile sound for projectiles on ballistic trajectories .24
Annex C (informative) Estimation of projectile velocity change.27
Annex D (informative) Calculation examples .30
Bibliography . 41
iii
ISO/DIS 17201-4:2024(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
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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 17201-4:2006), which has been technically
revised.
The main changes are as follows:
— restructuring of the document into new sections 1) Projectile sound, 2) Source description, 3) Sound
exposure level at the receiver, and 4) Uncertainty;
— separation of source and propagation terms;
— included (from ISO 17201-2) and updated: the source level for non-streamlined projectiles;
— updated the Clause on uncertainty;
— added Annex B on ballistic trajectories;
— added Annex C on projectile velocity change;
— added Annex D with informative examples.
A list of all parts in the ISO 17201 series can be found on the ISO website.
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 17201-4:2024(en)
Introduction
Shooting sound registered around shooting ranges consists in general of three components: muzzle blast
sound, impact sound and projectile sound. This document deals solely with the projectile sound from
supersonic projectiles. It specifies a method for calculating the source sound exposure level of projectile
sound. It also provides a method for calculating the propagation of projectile sound, accounting for its
distinct characteristics that set it apart from the propagation of sound originating from other sources.
This document is intended for calibres of less than 20 mm but can also be used for larger calibres.
Projectile sound is described as originating from a certain point on the projectile trajectory, the “source point”.
The source sound exposure level is calculated from the geometric properties and the speed of the projectile
along its trajectory. Methods are given on how the sound exposure level at a receiver location is to be
calculated from this source sound exposure level, taking into account geometrical attenuation, atmospheric
absorption and attenuation and frequency shift due to non-linear effects. In addition, the effects on the
sound exposure level due to the decrease of the projectile speed and atmospheric turbulence are taken into
account.
In a restricted region, the Mach region (region II – see 4.2), the projectile sound exposure level is significant
compared to the muzzle blast sound exposure level. Outside this region only diffracted or scattered projectile
sound is received, with considerably lower levels than in this Mach region. Projectile sound behind the Mach
region (region I) is negligible compared to muzzle sound, except for contributions due to reflections from
other regions. In this document, a computationa
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