Acoustics - Noise from shooting ranges - Part 5: Noise management (ISO 17201-5:2010)

ISO 17201-5:2010 gives guidelines for noise management of shooting activity at shooting ranges. The control of the noise received outside shooting ranges at specified reception points based either on measured or calculated sound exposure levels is specified. ISO 17201-5:2010 can also be used in the planning of new or reconstruction of existing ranges. It is intended to comply with all relevant local rules and regulations which imply a conversion of sound exposure level to other indicators as given in ISO 17201-3.
ISO 17201-5:2010 applies to weapons with calibres of less than 20 mm or explosive charges of less than 50 g TNT equivalent and pressures of less than 1 kPa at the reception point.
NOTE       National or other regulations, which could be more stringent, can apply.

Akustik - Geräusche von Schießplätzen - Teil 5: Lärmmanagement (ISO 17201-5:2010)

Dieser Teil von ISO 17201 gibt Anleitung zum Lärmmanagement von Schießaktivitäten auf Schießplätzen. Die
Überwachung von Geräuschen, die an bestimmten Immissionsorten außerhalb von Schießplätzen einwirken,
wird auf der Grundlage von gemessenen oder von berechneten Schallexpositionspegeln spezifiziert. Dieser
Teil von ISO 17201 kann auch für die Planung neuer oder die Sanierung bzw. den Umbau bereits
vorhandener Anlagen herangezogen werden. Angestrebt wird eine Anschlussfähigkeit an alle relevanten
lokalen Regeln und Regelwerke. Dies schließt auch die Umrechnung des Schallexpositionspegels in andere
als in ISO 17201-3 gegebene Indikatoren mit ein.
Dieser Teil von ISO 17201 ist anwendbar für Kaliber kleiner als 20 mm, für Treibladungen von weniger als
50 g TNT-Äquivalent sowie für Schalldrücke von weniger als 1 kPa am Immissionsort.
ANMERKUNG Nationale oder andere Regelwerke, die noch stringenter sein können, können angewandt werden.

Acoustique - Bruit des stands de tir - Partie 5: Gestion du bruit (ISO 17201-5:2010)

L'ISO 17201-5:2010 fournit des lignes directrices pour la gestion du bruit de l'activité de tir des stands de tir. Elle spécifie comment contrôler le bruit reçu à l'extérieur des stands de tir, en des points de réception spécifiques, sur la base de données mesurées ou de données calculées. L'ISO 17201-5:2010 peut aussi être utilisée pour la planification de stands nouveaux ou pour la reconstruction de stands existants. Elle est censée être conforme à toutes les règles et réglementation locales impliquant une conversion du niveau d'exposition sonore en d'autres indicateurs donnés dans l'ISO 17201-3.
L'ISO 17201-5:2010 est applicable aux calibres inférieurs à 20 mm ou aux charges explosives inférieures à une masse équivalente de 50 g de TNT et à des pressions inférieures à 1 kPa au point de réception.

Akustika - Hrup strelskih poligonov - 5. del: Nadzor nad hrupom (ISO 17201-5:2010)

Ta del ISO 17201 podaja smernice za nadzor nad hrupom strelne dejavnosti na strelskih poligonih. Določena je kontrola zvoka, sprejetega zunaj strelskih poligonov na določenih sprejemnih točkah, ki so osnovane bodisi na izmerjenih bodisi izračunanih stopnjah zvočne izpostavljenosti.  Ta del ISO 17201 se lahko uporablja tudi pri načrtovanju novih ali obnovitvi obstoječih poligonov.  Namenjen je temu, da izpolnjuje vsa ustrezna lokalna pravila in predpise, ki vsebujejo preoblikovanje stopnje zvočne izpostavljenosti na druge indikatorje, kot je podano v ISO 17201-3. Ta del ISO 17201 velja za orožja, katerih kaliber je manjši od 20 mm, ali eksplozivna polnjenja, manjša od ustreznih 50 g TNT ter pritiske, manjše od 1 kPa na sprejemni točki.

General Information

Status
Published
Publication Date
31-Jan-2010
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
01-Feb-2010
Completion Date
01-Feb-2010

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SLOVENSKI STANDARD
SIST EN ISO 17201-5:2010
01-maj-2010
Akustika - Hrup strelskih poligonov - 5. del: Nadzor nad hrupom (ISO 17201-
5:2010)

Acoustics - Noise from shooting ranges - Part 5: Noise management (ISO 17201-5:2010)

Akustik - Geräusche von Schießplätzen - Teil 5: Lärmmanagement (ISO 17201-5:2010)

Acoustique - Bruit des stands de tir - Partie 5: Gestion du bruit (ISO 17201-5:2010)

Ta slovenski standard je istoveten z: EN ISO 17201-5:2010
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
95.020 Vojaška tehnika. Vojaške Military engineering. Military
zadeve. Orožje affairs. Weapons
97.220.10 Športni objekti Sports facilities
SIST EN ISO 17201-5:2010 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 17201-5:2010
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SIST EN ISO 17201-5:2010
EUROPEAN STANDARD
EN ISO 17201-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2010
ICS 17.140.20; 95.020; 97.220.10
English Version
Acoustics - Noise from shooting ranges - Part 5: Noise
management (ISO 17201-5:2010)

Acoustique - Bruit des stands de tir - Partie 5: Gestion du Akustik - Geräusche von Schießplätzen - Teil 5:

bruit (ISO 17201-5:2010) Lärmmanagement (ISO 17201-5:2010)
This European Standard was approved by CEN on 28 November 2009.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the

official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17201-5:2010: E

worldwide for CEN national Members.
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SIST EN ISO 17201-5:2010
EN ISO 17201-5:2010 (E)
Contents Page

Foreword ..............................................................................................................................................................3

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SIST EN ISO 17201-5:2010
EN ISO 17201-5:2010 (E)
Foreword

This document (EN ISO 17201-5:2010) has been prepared by Technical Committee ISO/TC 43 "Acoustics" in

collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by August 2010, and conflicting national standards shall be withdrawn at

the latest by August 2010.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
Endorsement notice

The text of ISO 17201-5:2010 has been approved by CEN as a EN ISO 17201-5:2010 without any

modification.
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SIST EN ISO 17201-5:2010
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SIST EN ISO 17201-5:2010
INTERNATIONAL ISO
STANDARD 17201-5
First edition
2010-02-01
Acoustics — Noise from shooting
ranges —
Part 5:
Noise management
Acoustique — Bruit des stands de tir —
Partie 5: Gestion du bruit
Reference number
ISO 17201-5:2010(E)
ISO 2010
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
PDF disclaimer

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electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

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Published in Switzerland
ii © ISO 2010 – All rights reserved
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
Contents Page

Foreword ............................................................................................................................................................iv

Introduction.........................................................................................................................................................v

1 Scope......................................................................................................................................................1

2 Normative references............................................................................................................................1

3 Terms and definitions ...........................................................................................................................2

4 Management process............................................................................................................................7

5 Management documentation..............................................................................................................11

6 Uncertainties........................................................................................................................................12

Annex A (informative) Examples .....................................................................................................................13

Annex B (informative) Classification of muzzle blast (emission) ................................................................22

Bibliography......................................................................................................................................................25

© ISO 2010 – All rights reserved iii
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
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.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 17201-5 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.

ISO 17201 consists of the following parts, under the general title Acoustics — Noise from shooting ranges:

⎯ Part 1: Determination of muzzle blast by measurement
⎯ Part 2: Estimation of muzzle blast and projectile sound by calculation
⎯ Part 3: Guidelines for sound propagation calculations
⎯ Part 4: Prediction of projectile sound
⎯ Part 5: Noise management
iv © ISO 2010 – All rights reserved
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
Introduction

The initiative to prepare a standard on impulse noise from shooting ranges was taken by the Association of

European Manufacturers of Sporting Ammunition (AFEMS), in April 1996 by the submission of a formal

proposal to CEN (see doc. CEN N 1085). After consultation in CEN in 1998, CEN/TC 211, Acoustics, asked

ISO/TC 43, Acoustics, Subcommittee SC 1, Noise to prepare ISO 17201 (all parts).

This part of ISO 17201 provides guidance for noise management of shooting activity at shooting ranges. It

deals with the control of the noise received outside shooting ranges at specified reception points based either

on measured or calculated data.

In general, national or regional environmental authorities specify how sound from shooting ranges should

comply with guidelines, rules or regulations made by the relevant authorities. In situations with no official

regulations, the management of a shooting range may use the method specified in this part of ISO 17201.

NOTE Conflicting national guidelines, rules or regulations can prevent the application of methods described in this

part of ISO 17201.

Looking through various regulations used worldwide, many different approaches for noise control are found. In

some countries, the long-term equivalent continuous sound pressure level is used to limit sound levels from

shooting. In other countries, noise control is managed by limiting the level of one shot or by the difference

between the long-term rating level and background sound pressure level, etc. This part of ISO 17201 gives a

method for noise management to control the equivalent continuous sound pressure level by managing the

number of shots for each combination of weapon type, ammunition type, the locations of firing, and the firing

direction that is used in a shooting range. The weighting of the number of shots is related to the sound

exposure levels produced by each combination at the reception points. By directly relating the number of

shots to the limiting values, management objectives such as minimizing the noise load in the neighbourhood

can be met.
© ISO 2010 – All rights reserved v
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SIST EN ISO 17201-5:2010
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SIST EN ISO 17201-5:2010
INTERNATIONAL STANDARD ISO 17201-5:2010(E)
Acoustics — Noise from shooting ranges —
Part 5:
Noise management
1 Scope

This part of ISO 17201 gives guidelines for noise management of shooting activity at shooting ranges. The

control of the noise received outside shooting ranges at specified reception points based either on measured

or calculated sound exposure levels is specified. This part of ISO 17201 can also be used in the planning of

new or reconstruction of existing ranges. It is intended to comply with all relevant local rules and regulations

which imply a conversion of sound exposure level to other indicators as given in ISO 17201-3.

This part of ISO 17201 applies to weapons with calibres of less than 20 mm or explosive charges of less than

50 g TNT equivalent and pressures of less than 1 kPa at the reception point.
NOTE National or other regulations, which could be more stringent, can apply.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 1996-2, Acoustics — Description, measurement and assessment of environmental noise — Part 2:

Determination of environmental noise levels

ISO 17201-1:2005, Acoustics — Noise from shooting ranges — Part 1: Determination of muzzle blast by

measurement

ISO 17201-2, Acoustics — Noise from shooting ranges — Part 2: Estimation of muzzle blast and projectile

sound by calculation

ISO 17201-3, Acoustics — Noise from shooting ranges — Part 3: Guidelines for sound propagation

calculations

ISO 17201-4, Acoustics — Noise from shooting ranges — Part 4: Prediction of projectile sound

ISO/IEC Guide 98-3:2008, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in

measurement (GUM:1995)
© ISO 2010 – All rights reserved 1
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 17201-1 and the following apply.

3.1
event duration

stated time interval, long enough to encompass all significant sound of a stated event at a reception point

(3.22)
NOTE 1 The event duration is expressed in seconds.
NOTE 2 Adapted from ISO 17201-1:2005, 3.5.
3.2
sound exposure

integral of the square of the sound pressure, p, over a stated time interval or event of duration T (starting at t

and ending at t )
E = pt()dt (1)
NOTE 1 Sound exposure is expressed in square pascal seconds.
NOTE 2 Adapted from ISO 17201-1:2005, 3.6.

NOTE 3 Because of practical limitations of the measuring instruments, p is always understood to denote the square of

a frequency-weighted and frequency-band-limited sound pressure. If a specific frequency weighting as specified in

[6]

IEC 61672-1 is applied, this should be indicated by appropriate subscripts: e.g. E denotes the A-weighted sound

A,1 h
exposure over 1 h.

NOTE 4 When applied to a single event, the quantity is called “single event sound exposure” and the symbol E is used

without subscript.
[5]

NOTE 5 This definition is technically in accordance with ISO 80000-8:2007 , 8-18.

3.3
sound exposure level

ten times the logarithm to the base 10 of the ratio of the sound exposure (3.2), E , to a reference value, E ,

T 0
expressed in decibels
L = 10 lg dB (2)
2 −10 2
where the reference value, E , is (20 µPa) s = 4 × 10 Pa s
NOTE 1 Adapted from ISO 17201-1:2005, 3.7.
[6]

NOTE 2 Application of specific frequency weightings as specified in IEC 61672-1 is indicated by appropriate

subscripts.

NOTE 3 When applied to a single event, the quantity is called “single event sound exposure level” and the symbol L is

used without further subscript.
[5]

NOTE 4 This definition is technically in accordance with ISO 80000-8:2007 , 8-24.

2 © ISO 2010 – All rights reserved
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.4
total sound

totally encompassing sound in a given situation at a given time, usually composed of sound from many

sources near and far
[1]
[ISO 1996-1:2003 .3.4.1]
See Figure 1.
3.5
specific sound

component of the total sound (3.4) that can be specifically identified and which is associated with a specific

source
[1]
[ISO 1996-1:2003 .3.4.2]
See Figure 1.
3.6
residual sound

total sound (3.4) remaining at a given position and situation when the specific sounds (3.5) under

consideration are suppressed
[1]
[ISO 1996-1:2003 , 3.4.3]
See Figure 1.

a) Three specific sounds (3.5) A, B and C under b) Two specific sounds (3.5) A and B under

consideration — the residual sound (3.6) and the consideration — the residual sound (3.6) and the

total sound (3.4) are also shown total sound (3.4) are also shown
Key
1 total sound 4 specific sound C
2 specific sound A 5 residual sound
3 specific sound B

NOTE 1 The lowest residual sound level is obtained when all specific sounds are suppressed.

NOTE 2 In Figure 1 a), the dotted area indicates the residual sound when sounds A, B, and C are suppressed.

NOTE 3 In Figure 1 b), the residual sound includes the specific sound C since it is not under consideration.

Figure 1 — Total, specific and residual sound designation
© ISO 2010 – All rights reserved 3
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.7
background sound pressure level
A,N

equivalent continuous sound pressure level of residual sound (3.6) for a specified period of time

NOTE 1 Background sound pressure level is expressed in decibels.
NOTE 2 The time should be chosen with respect to the rating time period.

NOTE 3 The background sound pressure level depends on many parameters (such as time of the day and of the year,

wind speed, traffic, etc.) so that the level is expected to vary randomly.
3.8
background sound pressure spectrum

spectrum obtained by averaging over all spectra obtained during the specified time T without unusual events

or during periods where the level is below a specified percentile level
3.9
source combination

combination of specified weapon, ammunition, firing location, and firing direction used in the shooting range

3.10
immission class

class, of width 3 dB, to which a source combination (3.9) is assigned on the basis of the A-weighted long-

term sound exposure level L at a specified reception point (3.22)
E,A
[1]

NOTE The long-term averaged sound exposure level is defined in ISO 1996-1:2003 , 3.2.2.

3.11
immission class 0

immission class (3.10) with the highest long-term sound exposure level L at a specified reception

E,A,max
point (3.22)

NOTE 1 To determine the upper limit of immission class 0, 1,5 dB is added to L and the result is rounded to the

E,,A,max
nearest integer:
L (0) = round (L + 1,5 dB)
up E,A,max
The lower limit is obtained by subtracting 3 dB from L (0):
L (0) = L (0) − 3 dB
lo up

NOTE 2 The immission class limits are usually different for differently situated reception points.

NOTE 3 If the range is used under all weather conditions, the maximum value refers to the long-term average of these

conditions. If the use is linked to specific weather conditions, the maximum value refers to the long-term average for those

conditions.
NOTE 4 The operator “round” is used to denote rounding to the nearest integer.
3.12
immission class i

immission class (3.10) with an upper limit that is 3i dB, where i is an integer, below the upper limit of

immission class 0 (3.11)

NOTE With an increasing immission class number, the upper limit of the immission class decreases according to the

equation:
4 © ISO 2010 – All rights reserved
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
Li()=−L 0 3idB
up up
3.13
N % exceedance level
N(T)

time-weighted and frequency-weighted sound pressure level that is exceeded for N % of the time interval T

considered

EXAMPLE L is the A-frequency weighted, F-time-weighted sound pressure level exceeded for 95 % of 1 h.

p,AF,95,1h
NOTE 1 The N % exceedance level is expressed in decibels.
NOTE 2 Adapted from ISO 1996-1:2003, 3.1.3.
3.14
event index

number of shooting events of limited duration of which the time- and frequency-weighted level exceeds a

given value for a given time period, such as time of day, day of the week or their combinations

NOTE The event index counts the number of events exceeding a specific level at the reception point.

3.15
event index limit
limit that should not be exceeded by the event index (3.14)
3.16
immission class factor

weighting factor of a source combination (3.9), k, of which the sound exposure level at a reception point

(3.22) falls within immission class i (3.12):
C = 2 (3)

EXAMPLE Shots in immission classes i = 3 and i = 5 have weights 1/8 and 1/32, respectively, with the result that

four shots in immission class i = 5 are equivalent to one shot in immission class i = 3.

3.17
quota count

sound dose as sound energy/time at a reception point (3.22) resulting from all shots fired on a range during

a specific time period expressed as an equivalent number of shots of immission class 0 (3.11)

3.18
quota count limit
QCL
Q, lim

upper limit number of the quota count (3.17) which is related to the permissible or pursued limiting level

3.19
immission class level
E,A,i

A-weighted sound exposure level of shots which represents an immission class (3.10), set to −1 dB of the

upper limit of the immission class:
L = L (i) −1 dB (4)
E,A,i up
NOTE The immission class level is expressed in decibels.
© ISO 2010 – All rights reserved 5
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.20
equivalent continuous sound pressure level
p,eqT

ten times the logarithm to the base 10 of the ratio of the time-average of the square of the sound pressure, p,

during a stated time interval of duration T (starting at t and ending at t ), to the square of a reference value,

1 2
p , expressed in decibels
⎡⎤2
pt()dt
LL== 10 lg dB
pT,,peqT
⎢⎥2
where the reference value, p , is 20 µPa
[4]
[ISO/TR 25417:2007 , 2.3]

NOTE The A-weighted equivalent continuous sound pressure level, L , due to shots of the shooting range under

A,eq

evaluation, is calculated from the sound exposure level of all shots according to:

⎛⎞N
t 0,1L
0 Ej,A,
L = 10lg 10 dB (5)
A,eq ∑
j=1
where
t is the reference time, 1 s;
L is the sound exposure level, in decibels, of shot j;
E,A,j
N is the total number of shots;
T is the evaluation period, in seconds.
3.21
sound emergence

increase from background sound pressure level L (3.7) to total A-weighted equivalent continuous sound

A,N
pressure level, L , due to shooting sound
A,eq
[1]
NOTE 1 Adapted from ISO 1996-1:2003 , 3.4.7.
NOTE 2 EL=−L .
mA,eq A,N
NOTE 3 The sound emergence is expressed in decibels.
3.22
reception point
point of interest within the context of noise management
3.23
evaluation period
time period to be assessed by the rating level
NOTE The evaluation period is expressed in seconds.
EXAMPLE For a daytime period of 16 h: "16 × 3 600 s daytime".
6 © ISO 2010 – All rights reserved
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.24
source classification

classification for all weapon and ammunition combinations with respect to the weapon type

NOTE In the context of noise management procedures in this part of ISO 17201, the immission class quantities can

replace the acoustical features of the specific weapon/ammunition combinations.
3.25
source energy class

classification for the muzzle blast of weapon and ammunition combinations with respect to the source strength

in terms of source energy level

NOTE The sound energy level can be measured or estimated in accordance with ISO 17201-1 or ISO 17201-2,

respectively. See also Annex B.
3.26
source direction class

classification of weapon/ammunition combinations with respect to the directivity in terms of the angular source

energy distribution

NOTE The directivity pattern can be measured or estimated in accordance with ISO 17201-1 or ISO 17201-2,

respectively. See also Annex B.
3.27
specified level

〈shooting range noise〉 upper limit for the long-term L , used for the management process

A eq
NOTE The specified level is expressed in decibels.
4 Management process
4.1 General

The following management scheme allows the sound impact of a shooting range on a neighbourhood to be

estimated. The usage is expressed by the sum of the number of shots, n , of all source combinations, k, that

contribute to immission class i. The contribution of one shot of source combination, k, is expressed by its long-

term averaged sound exposure level L (k) at the reception point, which is used to assign immission class i to

E,A

this combination. Using the number of shots within each immission class, the quota count (QC) for each

reception point is calculated. The QC is directly related to the specified value set by the management, which is

the equivalent continuous sound pressure level of all shots. This value is related to the rating level by possible

additions. From the equivalent continuous sound pressure level the sound emergence can be obtained, if the

background sound pressure levels are known. If an event index is used, the QC concept can be modified to

take into account only those shots which are above a specified limit. For other evaluation schemes, the QC

concept may not be applicable.
4.2 Basic quantities
4.2.1 Classification of weapon, ammunition, and location combinations

The highest weighted sound exposure level at a reception point, L , of all m combinations is used to set

E,A,max
the upper limit of immission class 0, L (0), as follows:
L (0) = round (L − 0,5 dB) + 2 dB (6)
up E,A,max

The upper limit of immission class 0 is obtained by truncating the value of L to an integer number and

E,A,max
adding 2 dB.
© ISO 2010 – All rights reserved 7
---------------------- Page: 19 ----------------------
SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)

The immission class width is 3 dB, therefore immission class 0 has a lower limit L (0):

L (0) = L (0) − 3 dB (7)
lo up
which is the upper limit L (1) of immission class 1:
L (1) = L (0) (8)
up lo
Or for immission class i:
L (i) = L (i − 1) (9)
up lo

The long-term sound exposure level, L (k), at the reception point of each source combination, k, is used to

E,A
identify its immission class number i using
LL(0) − (k)
up E,A
i=−round 0,5 (10)
3dB

If projectile sound is perceived at the reception point, this shall also be included. The sound exposure level,

L (k), can be determined using reliable procedures such as those specified in ISO 17201-2 and

E,A

ISO 17201-4. Annex B contains a weapon and ammunition combination classification, which may be used to

describe the sound emission.

From the immission class index i the weighting factor of source combination, k, is obtained by Equation (3) as

follows: C = 2

Small variations of the combination elements, such as weapon (e.g. barrel length), ammunition (e.g.

characteristics or amount of propellant), firing location or firing direction can be classified in the same

immission class as long as the long-term average sound exposure level L at the reception points resulting

A,E
from those variations do not exceed the appropriate immission class limits.

NOTE The immission class width of 3 dB is chosen for each source combination as this classification leads to a

doubling of a number of shots from one immission class to the next without changing the equivalent level, e.g. 8 shots

which fall in immission class 3 produce the same rating level as one shot in immission class 0, because both produce the

same amount of sound energy in the long term.
4.2.2 Number of shots

As the number of shots for each source combination, k, during the evaluation time is the key quantity for the

determination of equivalent continuous sound pressure level L that allows management to estimate the

A,eq

sound load around the shooting range, it is required that the number of shots be registered for all m

combinations.
4.2.3 Quota count

The QC, n , is calculated as the sum of the number of shots n of source combination, k, weighted by

Q, k
immission class factor C
(11)
nC= n
Q ∑ kk
k=1
where
m is the number of source combinations;
C is the weighting factor of source combination k;

n is the number of shots of source combination, k, over the period of evaluation.

8 © ISO 2010 – All rights reserved
---------------------- Page: 20 ----------------------
SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)

NOTE 1 As the immission class width is 3 dB, one shot in class 0 is equivalent to two shots in immission class 1.

NOTE 2 If the evaluation period contains time periods during which an adj
...

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