SIST EN ISO 17201-5:2010
(Main)Acoustics - Noise from shooting ranges - Part 5: Noise management (ISO 17201-5:2010)
Acoustics - Noise from shooting ranges - Part 5: Noise management (ISO 17201-5:2010)
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.
Akustik - Geräusche von Schießplätzen - Teil 5: Lärmmanagement (ISO 17201-5:2010)
Dieser Teil der Internationalen Normenreihe ISO 17201 gibt Anleitung zum Lärmmanagement von Schießaktivitäten auf Schießplätzen. Er befasst sich mit der Überwachung von Geräuschen, die an bestimmten Immissionsorten außerhalb von Schießplätzen einwirken, entweder auf der Grundlage von gemessenen oder von berechneten Schallexpositionspegeln. Dieser Teil kann auch für die Planung neuer oder die Sanierung bzw. den Umbau bereits vorhandener Anlagen herangezogen werden. Dieser Teil der 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 an Immissionsorten.
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
Standards Content (Sample)
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
2
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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.
3
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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)
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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
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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.
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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)
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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
T
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
E
T
integral of the square of the sound pressure, p, over a stated time interval or event of duration T (starting at t
1
and ending at t )
2
t
2
2
E = pt()dt (1)
T
∫
t
1
NOTE 1 Sound exposure is expressed in square pascal seconds.
NOTE 2 Adapted from ISO 17201-1:2005, 3.6.
2
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
L
E
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
E
T
L = 10 lg dB (2)
E
E
0
2 −10 2
where the reference value, E , is (20 µPa) s = 4 × 10 Pa s
0
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
E
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
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.7
background sound pressure level
L
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
k
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):
up
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
L
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
C
k
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):
−i
C = 2 (3)
k
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
QC
n
Q
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
n
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
L
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.
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SIST EN ISO 17201-5:2010
ISO 17201-5:2010(E)
3.20
equivalent continuous sound pressure level
L
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
0
t
⎡⎤2
1
2
⎢⎥
pt()dt
∫
⎢⎥
T
t
1
⎢⎥
LL== 10 lg dB
pT,,peqT
⎢⎥2
p
0
⎢⎥
⎢⎥
⎢⎥
⎣⎦
where the reference value, p , is 20 µPa
0
[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 ∑
⎜⎟
T
p
j=1
⎝⎠
where
t is the reference time, 1 s;
0
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.
p
3.21
sound emergence
E
m
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
T
p
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".
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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
L
V
〈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
k
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:
up
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.
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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):
lo
L (0) = L (0) − 3 dB (7)
lo up
which is the upper limit L (1) of immission class 1:
up
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
−i
follows: C = 2
k
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
k
m
(11)
nC= n
Q ∑ kk
k=1
where
m is the number of source combinations;
C is the weighting factor of source combination k;
k
n is the number of shots of source combination, k, over the period of evaluation.
k
8 © ISO 2010 – All rights reserved
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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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