Small craft - Airborne sound emitted by powered recreational craft - Part 1: Pass-by measurement procedures (ISO 14509-1:2008)

ISO 14509-1:2008 specifies the conditions for obtaining reproducible and comparable measurement results of the maximum sound pressure level of airborne sound generated during the passage of powered recreational craft of up to 24 m length of hull, including inboards, stern drives, personal watercraft (PWC) and outboard motors.
It also specifies standard craft based type tests for stern drives with integral exhaust systems and for outboard motors. It also specifies the procedure to be followed if, in addition to the maximum sound pressure level, the determination of the sound exposure level is desired.
The accuracy grade of the acoustical test procedures specified in ISO 14509-1:2008 is engineering grade (grade 2).

Kleine Wasserfahrzeuge - Von motorgetriebenen Sportbooten abgestrahlter Luftschall - Teil 1: Vorbeifahrtmessungen (ISO 14509-1:2008)

Dieser Teil von ISO 14509 legt die Bedingungen für die Erlangung reproduzierbarer und vergleichbarer Messungergebnisse des maximalen Schalldruckpegels fest, der während der Vorbeifahrt von motorgetriebenen Sportbooten von bis zu 24 m Länge erzeugt wird. Eingeschlossen sind Boote mit Einbaumotor, Boote mit Z-Antrieb, Wassermotorräder (Jet-Ski) und Außenbordmotoren. Er legt darüber hinaus Abnahmeprüfungen mit einem Normboot für Z-Antriebe mit integriertem Auspuffsystem und für Außenbordmotoren fest. Es ist außerdem ein Verfahren beschrieben, nach dem der Schallexpositionspegel zu messen ist, falls seine Bestimmung zusätzlich zum maximalen Schalldruckpegel gewünscht ist.
ANMERKUNG Für Schallemissionsmessungen an anderen als den oben beschriebenen Booten gilt ISO 2922.
Das in diesem Teil von ISO 14509 beschriebene akustische Prüfverfahren ist von der Genauigkeitsklasse 2.

Petits navires - Bruit aérien émis par les bateaux de plaisance motorisés - Partie 1: Méthodes de mesure pour l'essai de passage (ISO 14509-1:2008)

L'ISO 14509-1:2008 spécifie les conditions d'obtention de résultats de mesures reproductibles et comparables relatifs au niveau maximum de pression acoustique du bruit aérien provoqué lors du passage de bateaux de plaisance motorisés dont la coque ne dépasse pas 24 m de longueur, y compris les moteurs intérieurs, les moteurs à embase de propulsion arrière, les scooters de mer (PWC) et les moteurs hors-bord. Elle spécifie également les essais de type basés sur des bateaux standard pour les moteurs à embase arrière de propulsion avec système d'échappement intégré et pour les moteurs hors-bord. Elle spécifie enfin les procédures à observer lorsque l'on souhaite déterminer le niveau d'exposition sonore en plus du niveau maximal de pression sonore.
La classe de précision des modes opératoires d'essais acoustiques spécifiés dans l'ISO 14509-1:2008 est la classe d'ingénierie (classe 2).

Mala plovila - Merjenje zvoka v zraku, ki ga oddajajo motorizirana rekreacijska plovila - 1. del: Postopki merjenja pri vožnji mimo (ISO 14509-1:2008)

Ta del standarda ISO 14509 določa pogoje za pridobivanje ponovljivih in primerljivih
rezultatov za najvišjo raven zvočnega tlaka pri merjenju zvoka v zraku, ki ga oddajajo mimovozeča motorizirana
rekreacijska plovila z dolžino trupa do 24 m, vključno z notranjimi motorji, krmnimi pogoni, motorji osebnih plovil (PWC) ter zunajkrmnimi motorji. Določa tudi standardne tipske teste za krmne pogone plovil z integriranimi izpušnimi sistemi in zunajkrmne motorje. Določa tudi postopek, ki ga je treba upoštevati, če je treba poleg najvišje ravni zvočnega tlaka ugotoviti tudi raven zvočne izpostavljenosti.
OPOMBA: Za merjenje zvočnih emisij pri plovilih, ki v tem dokumentu niso navedena, se uporablja ISO 2922.
Razred točnosti akustičnih preskusnih postopkov, kot je določeno v tem delu standarda ISO 14509, je inženirski razred (razred 2).

General Information

Status
Published
Publication Date
02-Oct-2018
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
03-Oct-2018
Completion Date
03-Oct-2018

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mala plovila - Merjenje zvoka v zraku, ki ga oddajajo motorizirana rekreacijska plovila - 1. del: Postopki merjenja pri vožnji mimo (ISO 14509-1:2008)Kleine Wasserfahrzeuge - Von motorgetriebenen Sportbooten abgestrahlter Luftschall - Teil 1: Vorbeifahrtmessungen (ISO 14509-1:2008)Petits navires - Bruit aérien émis par les bateaux de plaisance motorisés - Partie 1: Méthodes de mesure pour l'essai de passage (ISO 14509-1:2008)Small craft - Airborne sound emitted by powered recreational craft - Part 1: Pass-by measurement procedures (ISO 14509-1:2008)47.080ýROQLSmall craft17.140.30Emisija hrupa transportnih sredstevNoise emitted by means of transportICS:Ta slovenski standard je istoveten z:EN ISO 14509-1:2018SIST EN ISO 14509-1:2018en,fr,de01-december-2018SIST EN ISO 14509-1:2018SLOVENSKI

STANDARDSIST EN ISO 14509-1:20081DGRPHãþD
SIST EN ISO 14509-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 14509-1
October
t r s z ICS
v yä r z râ
s yä s v rä u r Supersedes EN ISO
s v w r {æ sã t r r zEnglish Version
Small craft æ Airborne sound emitted by powered recreational craft æ Part

sã Passæby measurement Petits navires æ Bruit aérien émis par les bateaux de plaisance motorisés æ Partie

sã Méthodes de mesure

Kleine Wasserfahrzeuge æ Von motorgetriebenen Sportbooten abgestrahlter Luftschall æ Teil

sã This European Standard was approved by CEN on
s x April
t r s zä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

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

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels

t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN ISO

s v w r {æ sã t r s z ESIST EN ISO 14509-1:2018

EN ISO 14509-1:2018 (E) 2 Contents Page European foreword ....................................................................................................................................................... 3 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of Directive 2013/53/EU aimed to be covered ....................................................... 4

SIST EN ISO 14509-1:2018

EN ISO 14509-1:2018 (E) 3 European foreword The text of ISO 14509-1:2008 has been prepared by Technical Committee ISO/TC 188 “Small craft” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 14509-1:2018. 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 April 2019, and conflicting national standards shall be withdrawn at the latest by April 2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 14509-1:2008. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2013/53/EU. For relationship with EU Directive 2013/53/EU, see informative Annex ZA, which is an integral part of this document. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 14509-1:2008 has been approved by CEN as EN ISO 14509-1:2018 without any modification. SIST EN ISO 14509-1:2018

EN ISO 14509-1:2018 (E) 4 Annex ZA (informative)

Relationship between this European Standard and the Essential Requirements of Directive 2013/53/EU aimed to be covered This European standard has been prepared under a Commission’s standardization request M/542 C(2015) 8736 final to provide one voluntary means of conforming to Essential Requirements of Directive 2013/53/EU. Once this standard is cited in the Official Journal of the European Union under that Directive, compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations. Table ZA.1 — Correspondence between this European Standard and Annex I of Directive 2013/53/EU Essential Requirements of Directive 2013/53/EU Clause(s)/sub-clause(s) of this EN Remarks/Notes Annex 1, Part C, 1 - Essential requirements for noise emissions; Noise emission levels. All Clauses This part EN ISO 14509 defines procedures for pass-by testing for measurement of noise emissions of recreational craft. This standard does not specify the information to be provided in the Owner’s Manual in accordance with Annex I.C.2 WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European Standard is maintained in the list published in the Official Journal of the European Union. Users of this standard should consult frequently the latest list published in the Official Journal of the European Union. WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of this standard.

SIST EN ISO 14509-1:2018
Reference numberISO 14509-1:2008(E)© ISO 2008

INTERNATIONAL STANDARD ISO14509-1First edition2008-10-01Small craft — Airborne sound emitted by powered recreational craft — Part 1: Pass-by measurement procedures Petits navires — Bruit aérien émis par les bateaux de plaisance motorisés — Partie 1: Méthodes de mesure pour l'essai de passage

SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

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SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword............................................................................................................................................................iv 1 Scope.....................................................................................................................................................1 2 Normative references...........................................................................................................................1 3 Terms and definitions...........................................................................................................................1 4 Symbols.................................................................................................................................................3 5 Measurement quantity..........................................................................................................................3 6 Measurement uncertainty....................................................................................................................3 7 Measuring equipment...........................................................................................................................5 8 Test site specifications and environmental conditions....................................................................5 9 Test course, microphone positions and measurement distance....................................................6 10 Operating conditions............................................................................................................................8 11 Test procedure......................................................................................................................................9 12 Test report.............................................................................................................................................9 13 Standard craft specifications for outboard motor type tests according to Clause 10................10 14 Standard craft specifications for type tests for stern drives with integral exhaust systems according to Clause 10.......................................................................................................................11 Annex A (normative)

Measurement of the sound exposure level...............................................................12 Annex B (informative)

Example of test report form......................................................................................16 Bibliography.....................................................................................................................................................18

Figures Figure 1 — Position of the microphone and test course...............................................................................7 Figure 2 — Microphone position and heights.................................................................................................7 Tables Table 1 — Standard deviation of reproducibility of individual sources of measurement..........................4 Table 2 — Variability for a coverage probability of 90 %...............................................................................4 Table 3 — Correction for background sound pressure level, L″pAS, for monitoring tests.........................6 Table 4 — Standard craft specifications.......................................................................................................10 Table 5 — Standard craft specifications for petrol engines........................................................................11 Table 6 — Standard craft specifications for diesel engines........................................................................11 Table A.1 — Standard deviation of reproducibility of individual sources of measurement....................12 Table A.2 — Variability for a coverage probability of 90 %.........................................................................13 Table A.3 — Correction for background sound exposure level, L″AE, for monitoring tests....................14

SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) iv © ISO 2008 – All rights reserved 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 14509-1 was prepared by Technical Committee ISO/TC 188, Small craft. This first edition of ISO 14509-1 cancels and replaces ISO 14509:2000, which has been technically revised. It also incorporates the Amendment ISO 14509:2000/Amd.1:2004. ISO 14509 consists of the following parts, under the general title Small craft — Airborne sound emitted by powered recreational craft: ⎯ Part 1: Pass-by measurement procedures ⎯ Part 2: Sound assessment using reference craft ⎯ Part 3: Sound assessment using calculation and measurement procedures

SIST EN ISO 14509-1:2018

INTERNATIONAL STANDARD ISO 14509-1:2008(E) © ISO 2008 – All rights reserved 1Small craft — Airborne sound emitted by powered recreational craft — Part 1: Pass-by measurement procedures 1 Scope This part of ISO 14509 specifies the conditions for obtaining reproducible and comparable measurement results of the maximum sound pressure level of airborne sound generated during the passage of powered recreational craft of up to 24 m length of hull, including inboards, stern drives, personal watercraft (PWC) and outboard motors. It also specifies standard craft based type tests for stern drives with integral exhaust systems and for outboard motors. It also specifies the procedure to be followed if, in addition to the maximum sound pressure level, the determination of the sound exposure level is desired. NOTE For craft other than those specified above, ISO 2922 is applicable for sound emission measurements. The accuracy grade of the acoustical test procedures specified in this part of ISO 14509 is engineering grade (grade 2). 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 8665, Small craft — Marine propulsion reciprocating internal combustion engines — Power measurements and declarations ISO 8666:2002, Small craft — Principal data ISO 10087, Small craft — Craft identification — Coding system IEC 60942, Electroacoustics — Sound calibrators IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 type test for recreational craft type test measurement performed to prove that the sound of the craft in motion, or of the outboard motor when using a standard craft, or of the stern drive with integral exhaust system when using a standard craft, complies with sound specifications or prescribed limits NOTE See also definition of “acceptance test” in ISO 2922. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) 2 © ISO 2008 – All rights reserved 3.2 monitoring test for recreational craft monitoring test measurement performed in order to check that the sound of the craft in motion, or of the outboard motor when using any craft, or of the stern drive with integral exhaust system when using any craft, is still within prescribed limits and that no noticeable changes have occurred since the acceptance on initial delivery or after modification, as applicable NOTE 1 Subsequent type testing can also be required in the case of a significant change. NOTE 2 See also definition of “monitoring test” in ISO 2922. 3.3 maximum A-frequency weighted sound pressure level with time weighting S for recreational craft maximum AS-weighted sound pressure level LpASmax maximum sound pressure level achieved from measurement of the passage of the craft under specified operating conditions measured with frequency weighting A and with time weighting S (slow) according to IEC 61672-1 NOTE It is expressed in decibels (dB). 3.4 A-weighted sound exposure EA,T integral of the square of the A-weighted sound pressure, p, over a stated time interval or event of duration T (starting at t1 and ending at t2) ()212A,AdtTtEptt=∫ (1) NOTE 1 Unit: pascal squared second, Pa2 s. NOTE 2 By practical limitations of the measuring instruments, p2 is always understood to denote the square of a frequency-weighted and frequency-band-limited sound pressure. The application of a specific frequency weighting as specified in IEC 61672-1 is indicated by an appropriate subscript, e.g. EA,1h denotes the A-weighted sound exposure over one hour. NOTE 3 When applied to a single event of impulsive or intermittent sound, the quantity is called “single event sound exposure” and the symbol E is used without subscript. NOTE 4 This definition applies only for the optional measurement of sound exposure levels according to Annex A. NOTE 5 Adapted from ISO/TR 25417:2007, 2.6. 3.5 A-weighted sound exposure level LE,A,T ten times the logarithm to the base 10 of the ratio of the A-weighted sound exposure, EA,T, to a reference value, E0, expressed in decibels A,,A,010lgdBTETELE⎛⎞=⎜⎟⎜⎟⎝⎠ (2) NOTE 1 The reference value, E0, is (20 µPa)2 s = 4 × 10−10 Pa s. NOTE 2 The application of a specified frequency weighting as specified in IEC 61672-1 is indicated by an appropriate subscript, e.g. LE,A,T,1h denotes the A-weighted sound exposure level over one hour. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) © ISO 2008 – All rights reserved 3NOTE 3 When applied to a single event of impulsive or intermittent sound, the quantity is called “single event sound exposure level” and the symbol LE is used without further subscript. NOTE 4 In this part of ISO 14509, the sound exposure level is to characterize the emission of the source and not the noise impact on people exposed to the sound. NOTE 5 This definition applies only for the optional measurement of sound exposure level according to Annex A. NOTE 6 Adapted from ISO/TR 25417:2007, 2.6. 3.6 background noise for recreational craft background noise noise from all sources other than the craft under test EXAMPLE Noise from waves splashing on the measuring craft or the shore, other craft or equipment, and wind effects. 3.7 stern-drive propulsion unit with the engine inboard and the transmission/drive located external to the hull 3.8 stern-drive with integral exhaust systems stern-drive where the exhaust gases are expelled through the transmission/drive 4 Symbols L′pASmax maximum AS-weighted sound pressure level during the passage, expressed in decibels (dB); L″pAS AS-weighted background sound pressure level, expressed in decibels (dB); LpASmax L′pASmax after applying background noise correction according to 8.3 and distance correction according to 9.2, expressed in decibels (dB); L′AE A-weighted sound exposure level during the passage, expressed in decibels (dB); L″AE A-weighted background sound exposure level, expressed in decibels (dB); LAE L′AE after applying background noise correction according to A.5 and distance correction according to A.6, expressed in decibels (dB). 5 Measurement quantity The quantity to be measured during the passage of the craft is the maximum AS-weighted sound pressure level, L′pASmax. From this quantity, the maximum AS-weighted sound pressure level, LpASmax, is determined by applying the background noise correction and distance correction, if applicable. 6 Measurement uncertainty The measurement procedure specified in the following clauses is affected by several parameters (e.g. measurement system uncertainty, environmental conditions, craft course uncertainty) that can lead to variation in the level recorded for a given craft. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) 4 © ISO 2008 – All rights reserved In the absence of sufficient experimental data on the overall uncertainty, the uncertainty associated with this part of ISO 14509 has been evaluated by the procedure given in the Guide to the expression of uncertainty in measurement (GUM) (see Bibliography), where each individual source of uncertainty is identified and quantified based upon existing statistical data or engineering judgment. The individual sources of uncertainty identified, with their standard deviations, are given in Table 1. Table 1 — Standard deviation of reproducibility of individual sources of measurement

Individual sources of uncertainty Individual standard deviations of the maximum AS-weighted sound pressure level, LASmax dB Distance effects 0,3 Measuring equipment 1,0 Environmental conditions 1,5 Operator effects 0,2 Test site variations 1,0 These individual sources of uncertainty are grouped as follows. a) Run-to-run: the variations expected within a single test series. b) Day-to-day: the variations expected within the same test site, but over more than a single test series and including a) above. c) Site-to-site: the variation expected across different test sites and test personnel and including a) and b) above. The expanded uncertainty for the combined standard uncertainties for these three groups, for a coverage probability of 90 %, is given in Table 2. Table 2 — Variability for a coverage probability of 90 % Variability case Expanded uncertainty dB Run-to-run 0,3 Day-to-day 1,8 Site-to-site 2,1 NOTE In addition to the above uncertainties, a further uncertainty needs to be considered in the case of multi-engined craft. If the sound of a specific multi-engined craft is dominated by exhaust noise, the phasing of its engines, when running at nominally the same engine speed, can have a significant effect upon the vessel’s pass by noise. Extreme examples of maximum AS-weighted sound pressure levels of up to 6 dB of the variability have been recorded. The uncertainties considered in this part of ISO 14509 do not cover the uncertainties associated with the variation in the production process for a specific craft. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) © ISO 2008 – All rights reserved 57 Measuring equipment 7.1 Equipment specifications The instrumentation system, including microphones and cables (which shall be used according to the manufacturer’s specifications), and including the windscreen recommended by the manufacturer and the overall electroacoustic performance of any additional measuring equipment, including for example a tape recorder and/or level recorder, shall meet the requirements for a class 1 instrument specified in IEC 61672-1. NOTE Sound level meters with “maximum hold” capabilities are preferred. When a tape recorder is used for the measurements, the dynamic range of the instrumentation shall be consistent with the measured signal. A wind speed anemometer which has an uncertainty of less than ± 10 % shall be used. An engine speed tachometer which has an uncertainty of less than ± 2 % shall be used. 7.2 Equipment calibration A class 1 sound calibrator which meets the requirements of IEC 60942 shall be used. The overall acoustic performance of the measurement equipment shall be checked with the sound calibrator according to the instructions of its manufacturer at the beginning and at the end of each series of measurements, at least every four hours during testing and at the beginning and end of each measurement day. At intervals of no longer than two years, the sound level meter shall undergo laboratory verification for compliance with IEC 61672-1. The date of the last verification of compliance with IEC 61672-1 shall be recorded. The sound calibrator used for calibration of the sound level meter shall undergo laboratory verification every year with traceability to a laboratory, using national standards. 8 Test site specifications and environmental conditions 8.1 Test site specifications Within 30 m around the craft under test and the microphone, there shall be no large surfaces (e.g. retaining walls, building façades, rocks, bridges) from which sound can be reflected back to the microphone. In the vicinity of the microphone, there shall be no obstacles which could disturb the sound field. Therefore, no person shall be between the microphone and the sound source, and any observers shall be in such a position that any influence on the meter reading is avoided. The area between the craft under test and the measurement microphone shall be open water and free from any sound absorbing or sound reflecting objects that can affect the measurement. At the test course, the depth of water shall be sufficient for normal operation of the craft. NOTE Shallow water can increase the reading of the pass-by sound pressure level. 8.2 Environmental conditions 8.2.1 The wind velocity in the test area during the pass-by shall not exceed 7 m/s. 8.2.2 Tests shall not be carried out in conditions of rain or other precipitation. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) 6 © ISO 2008 – All rights reserved 8.2.3 The wave height in the test area during the pass-by shall not exceed H according to Equation (3) or 0,1 m, whichever is the greater. H = Lwl/50 (3) where Lwl is the length of the waterline according to ISO 8666. NOTE The sound of any wave impact (slamming) could lead to a considerable increase of the measured sound pressure level. 8.3 Background noise 8.3.1 General A measurement shall be invalid if changes in the background noise affect the applicable reading. 8.3.2 Type tests For type tests, the AS-weighted background sound pressure level, L″pAS, shall be at least 10 dB below the maximum AS-weighted sound pressure level, L′pASmax, obtained during the passage of the craft. 8.3.3 Monitoring tests For monitoring tests, the AS-weighted background sound pressure level, L″pAS, shall be at least 6 dB below the maximum AS-weighted sound pressure level, L′pASmax, obtained during the passage of the craft. The reading shall then be corrected as shown in Table 3. Table 3 — Correction for background sound pressure level, L″pAS, for monitoring tests Values in decibels Increase in the indication of the AS-weighted sound pressure level obtained during the passage of the craft,L′pASmax − L″pAS Correction to be applied to the reading of

the AS-weighted sound pressure level, L′pASmax, obtained during the passage of the craft W 10 0 6 to 9 −1 9 Test course, microphone positions and measurement distance 9.1 General 9.1.1 The test course to be followed shall be a straight line such that the distance between the microphone and the side of the craft nearest to the microphone when passing it shall be ()2025m+. The microphone shall be orientated to the path of the craft in accordance with the manufacturer’s recommendation for the microphone and associated equipment type. NOTE Figure 1 gives information on the test site dimensions. SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) © ISO 2008 – All rights reserved 7Dimensions in metres

Key 1 craft 2 microphone a Craft course line. Figure 1 — Position of the microphone and test course 9.1.2 The microphone shall be positioned 3,5 m ± 0,5 m above the water surface and, if mounted on a solid surface, shall be positioned at least 1,2 m above that surface. The microphone shall be positioned within ± 0,5 m of the edge of the surface above which it is mounted. The microphone may be placed on the shore, on a boat, on a remote buoy or other suitable platform. Figure 2 shows the heights of the microphone position (example for shore position). Dimensions in metres

Key 1 craft 2 microphone Figure 2 — Microphone position and heights SIST EN ISO 14509-1:2018

ISO 14509-1:2008(E) 8 © ISO 2008 – All rights reserved 9.1.3 The intended course line should be indicated with markers, if possible. 9.1.4 For craft less than 6 m in length, the microphone may be placed ()1012,5m+ from the test source if the background noise requirements according to 8.3 cannot be met when measuring at the distance of 25 m from the test source. NOTE The reason is that it can be necessary to compensate for the low sound pressure levels by moving the microphone to a position which is closer to the craft without venturing into the acoustic near field. 9.2 Distance correction If the distance between the microphone and the course line is set at 12,5 m, the measured maximum AS-weighted sound pressure level for each passage, L′pASmax, shall be normalised to 25 m by subtracting 5

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