SIST EN 415-9:2010
Safety of packaging machines - Part 9: Noise measurement methods for packaging machines, packaging lines and associated equipment, grade of accuracy 2 and 3
Safety of packaging machines - Part 9: Noise measurement methods for packaging machines, packaging lines and associated equipment, grade of accuracy 2 and 3
This standard specifies all the information necessary to carry out efficiently and under defined conditions the determination, information and verification of airborne noise emission from packaging machine covered by EN 415-1. This measurement method specifies procedures for the determination of emission sound pressure levels at work station, at other specified positions and the sound power level on the basis of both the sound pressure level method and the sound intensity method. It also specifies installation and operating conditions. This standard applies to machines covered by EN 415-1 as well as for any other packaging machine which are not covered by any other specific noise test code as well as for machines being part of packaging line. In such cases, all information relating to the assembly, installation and to the operating conditions as well as the arrangement of the work station shall be recorded and reported in the test report. Noise emission characteristics include the following data: emission sound pressure level at work station and at other specified positions; sound power emitted by machine. Both can be used: to determine the noise emitted by machine; to inform on the noise emitted by the machine; to verify the noise emitted by the machine. Noise emission values permit comparison of packaging machines on the market. The use of this standard ensures the reproducibility of the determination of the characteristic noise emissions values within specific limits which will be determined by the grade of accuracy of the noise emission measuring method used.
Sicherheit von Verpackungsmaschinen - Teil 9: Verfahren zur Geräuschmessung bei Verpackungsmaschinen, Verpackungslinien und Hilfseinrichtungen - Genauigkeitsklassen 2 und 3
Diese Geräuschmessnorm legt alle Angaben fest, die notwendig sind, um die Bestimmung, Angabe und Über¬prüfung von Luftschallemission der von EN 415-1:2000 erfassten Verpackungsmaschinen wirksam und unter definierten Bedingungen durchzuführen.
Diese Geräuschmessnorm legt Verfahren zur Bestimmung von Schalldruckpegeln an Arbeitsplätzen und an anderen festgelegten Orten sowie des Schallleistungspegels sowohl auf Grundlage der Verfahren zur Bestimmung des Schalldruckpegels als auch der Schallintensität fest. Sie legt auch die Aufstellungs- und Betriebsbedingungen fest.
Diese Geräuschmessnorm gilt für Maschinen, die von EN 415-1:2000 erfasst werden, sowie für alle gleichartigen Maschinen, die nicht durch eine andere spezifische Geräuschmessnorm behandelt werden. In derartigen Fällen sollten sämtliche Angaben in Bezug auf Montage, Aufstellung und die Betriebsbedingungen sowie die Anordnung der Arbeitsplätze aufgezeichnet und im Prüfbericht angegeben werden.
Zu den Kenngrößen der Geräuschemission gehören Emissionsschalldruckpegel am Arbeitsplatz (an Arbeitsplätzen) und die Schallleistung. Beide können verwendet werden, um
- Lärm an Arbeitsplätzen zu bestimmen oder zu überprüfen;
- die Geräuschabstrahlung von Maschinen zu bestimmen oder zu überprüfen;
- die Geräuschabstrahlung von Maschinen anzugeben.
Die erhaltenen Geräuschemissionsdaten können zum Vergleich mit Geräuschemissionswerten von gleich¬artigen auf dem Markt befindlichen Verpackungsmaschinen verwendet werden.
Die Anwendung dieser Geräuschmessnorm stellt die Reproduzierbarkeit der Bestimmung der charakteristischen Geräuschemissionswerte innerhalb festgelegter Grenzwerte sicher, die durch den Genauigkeitsgrad des zur Geräuschemissionsmessung angewendeten Verfahrens bestimmt werden.
Sécurité des machines d'emballage - Partie 9 : Codes d'essai bruit pour machines d'emballage, ligne d'emballage et équipements associés - Méthode de catégorie 2 et 3
Le présent code d’essai bruit précise toutes les informations nécessaires pour réaliser, de maniere efficace et
dans des conditions définies, la détermination, la déclaration et la vérification du bruit aérien émis par une
machine d’emballage couverte par la norme EN 415-1:2000.
Le présent code d’essai bruit spécifie les procédures permettant de déterminer les niveaux de pression
acoustique aux postes de travail, a d’autres positions spécifiées, ainsi que le niveau de puissance acoustique
sur la base de la méthode du niveau de pression acoustique et de la méthode de l’intensité acoustique. Il
spécifie également les conditions d’installation et de fonctionnement.
Le présent code d’essai bruit s’applique aux machines couvertes par la norme EN 415-1:2000, ainsi qu’a
toute autre machine analogue non couverte par un autre code d’essai bruit spécifique. Dans ce cas, il
convient que toutes les informations relatives aux conditions de montage, d’installation et de fonctionnement,
ainsi qu’a la disposition des postes de travail soient consignées et rapportées dans le rapport d’essai.
Les caractéristiques d’émission sonore incluent les niveaux de pression acoustique d’émission au(x) postes(s)
de travail et la puissance acoustique. Les deux peuvent permettre de :
- déterminer ou vérifier le bruit aux postes de travail ;
- déterminer ou vérifier le bruit émis par la machine ;
- déclarer le bruit émis par la machine.
Les données d’émission sonore obtenues peuvent etre utilisées pour comparer les valeurs d’émission sonore
de machines d’emballage analogues présentes sur le marché.
L’utilisation du présent code d’essai bruit assure la reproductibilité de la détermination des valeurs d’émission
sonore caractéristiques dans des limites spécifiques qui seront déterminées par la classe de précision de la
méthode de mesure d’émissions sonores utilisée.
Pakirne naprave - Varnost pakirnih naprav - 9. del: Metode meritve hrupa pakirnih strojev, pakirnih linij in pomožne opreme - Razreda točnosti 2 in 3
Ta standard opredeljuje vse informacije, ki so potrebne za učinkovito izvajanje določevanja pod opredeljenimi pogoji, obveščanje in preverjanje emisij hrupa pakirnih naprav, ki se prenašajo po zraku in ki jih zajema EN 415-1. Ta metoda merjenja določa postopke za določevanje ravni emisije zvočnega tlaka na delovnih postajah, na drugih opredeljenih mestih in raven zvočne moči na osnovi tako metode ravni zvočne moči kot tudi metode jakosti zvoka. Opredeljuje tudi pogoje namestitve in obratovanja. Ta standard se uporablja za stroje, ki jih zajema EN 415-1, kot tudi za vse druge pakirne naprave, ki jih ne zajema nobena druga posebna oznaka preskusa hrupa, kot tudi za stroje, ki so del pakirne linije. V takih primerih morajo biti vsi podatki, ki se nanašajo na sestavljanje, namestitev in pogoje obratovanja, kot tudi ureditev delovne postaje, evidentirani in vključeni v poročilo o preskusu. Značilnosti emisije hrupa vključujejo naslednje podatke: raven emisije zvočnega tlaka na delovni postaji in na drugih opredeljenih mestih; zvočna moč, ki jo oddaja naprava. Oboje se lahko uporablja: za določevanje hrupa, ki ga oddaja naprava; za obveščanje o hrupu, ki ga oddaja naprava; za preverjanje hrupa, ki ga oddaja naprava. Vrednosti emisij hrupa omogočajo primerjavo pakirnih naprav na trgu. Uporaba tega standarda zagotavlja obnovljivost določevanja značilnih vrednosti emisij hrupa znotraj posebnih omejitev, ki se bodo določile s razredom točnosti uporabljene metode merjenja emisij hrupa.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Sicherheit von Verpackungsmaschinen - Teil 9: Verfahren zur Geräuschmessung bei Verpackungsmaschinen, Verpackungslinien und Hilfseinrichtungen - Genauigkeitsklassen 2 und 3Sécurité des machines d'emballage - Partie 9 : Codes d'essai bruit pour machines d'emballage, ligne d'emballage et équipements associés - Méthode de catégorie 2 et 3Safety of packaging machines - Part 9: Noise measurement methods for packaging machines, packaging lines and associated equipment, grade of accuracy 2 and 355.200Pakirni strojiPackaging machinery17.140.20Emisija hrupa naprav in opremeNoise emitted by machines and equipmentICS:Ta slovenski standard je istoveten z:EN 415-9:2009SIST EN 415-9:2010en,fr,de01-marec-2010SIST EN 415-9:2010SLOVENSKI
STANDARD
SIST EN 415-9:2010
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 415-9August 2009ICS 17.140.20; 55.200 English VersionSafety of packaging machines - Part 9: Noise measurementmethods for packaging machines, packaging lines andassociated equipment, grade of accuracy 2 and 3Sécurité des machines d'emballage - Partie 9 : Codesd'essai bruit pour machines d'emballage, ligne d'emballageet équipements associés - Méthode de catégorie 2 et 3Sicherheit von Verpackungsmaschinen - Teil 9: Verfahrenzur Geräuschmessung bei Verpackungsmachinen,Verpackungslinien und Hilfseinrichtungen -Genauigkeitsklassen 2 und 3This European Standard was approved by CEN on 10 July 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 415-9:2009: ESIST EN 415-9:2010
EN 415-9:2009 (E) 2 Contents Page Foreword . 31 Scope . 42 Normative references . 43 Terms and definitions . 54 Description of machine under test . 65 Determination of the emission sound pressure level at work station . 65.1 Sound pressure level measurement at work station . 65.2 Background noise correction K1. 65.3 Local environmental correction K3 . 66 Determination of the sound power level . 66.1 General method . 66.2 Alternative method for very large machines . 77 Assembly and installation conditions . 78 Operating conditions . 79 Measurement uncertainty . 810 Information to be recorded . 811 Information to be reported . 812 Information and verification of noise emission values .10Annex A (normative)
Selection of the appropriate standard for the measurement of the sound pressure level at the work station .11Annex B (normative)
Evaluation of local environmental correction K3 .14B.1 Background noise correction K1.14B.2 Local environmental correction K3 (EN ISO 11202) .14B.3 Local correction factor K3 (EN ISO 11204) .16Annex C (normative)
Selection of appropriate standard for sound power level measurement .17Annex D (informative)
Information on the machine under test and environmental conditions .20Annex E (informative)
NOISE MEASUREMENT REPORT .24Annex ZA (informative)
Relationship between this
European Standard and the Essential Requirements of EU Directive 98/37/EC .27Annex ZB (informative)
Relationship between this
European Standard and the Essential Requirements of EU Directive 2006/42/EC .28Bibliography .29 SIST EN 415-9:2010
EN 415-9:2009 (E) 3 Foreword This document (EN 415-9:2009) has been prepared by Technical Committee CEN/TC 146 “Packaging machines safety”, the secretariat of which is held by UNI. 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 February 2010, and conflicting national standards shall be withdrawn at the latest by February 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. The standard EN 415 consists of the following parts:
Packaging machines safety – Part 1: Terminology and classification of packaging machines and associated equipment Packaging machines safety – Part 2: Pre-formed rigid container packaging machines Safety of packaging machines – Part 3: Form, fill and seal machines Safety of packaging machines – Part 4: Palletisers and depalletisers Safety of packaging machines – Part 5: Wrapping machines Safety of packaging machines – Part 6: Pallet wrapping machines Safety of packaging machines – Part 7: Group and secondary packaging machines Safety of packaging machines – Part 8: Strapping machines Safety of packaging machines – Part 9: Noise measurement methods for packaging machines, packaging lines and associated equipment, grade of accuracy 2 and 3. 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, 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. SIST EN 415-9:2010
EN 415-9:2009 (E) 4 1 Scope This standard specifies all the information necessary to carry out efficiently and under defined conditions the determination, information and verification of airborne noise emission from packaging machine covered by EN 415-1. This measurement method specifies procedures for the determination of emission sound pressure levels at work station, at other specified positions and the sound power level on the basis of both the sound pressure level method and the sound intensity method. It also specifies installation and operating conditions. This standard applies to machines covered by EN 415-1 as well as for any other packaging machine which are not covered by any other specific noise test code as well as for machines being part of packaging line. In such cases, all information relating to the assembly, installation and to the operating conditions as well as the arrangement of the work station shall be recorded and reported in the test report. Noise emission characteristics include the following data: emission sound pressure level at work station
and at other specified positions; sound power emitted by machine. Both can be used: to determine the noise emitted by machine; to inform on the noise emitted by the machine; to verify the noise emitted by the machine. Noise emission values permit comparison of packaging machines on the market. The use of this standard ensures the reproducibility of the determination of the characteristic noise emissions values within specific limits which will be determined by the grade of accuracy of the noise emission measuring method used. 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. EN 415-1:2000, Packaging machines safety – Part 1: Terminology and classification of packaging machines and associated equipment EN ISO 3740:2000, Acoustics – Determination of sound power levels of noise sources – Guidelines for the use of basic standards (ISO 3740:2000) EN ISO 3744:1995, Acoustics – Determination of sound power levels of noise sources using sound pressure – Engineering
method in an essentially free field over a reflecting plane (ISO 3744:1994) EN ISO 3746:1995, Acoustics – Determination of sound power levels of noise sources using sound pressure – Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995) SIST EN 415-9:2010
EN 415-9:2009 (E) 5 EN ISO 3747:2000, Acoustics – Determination of sound power levels of noise sources using sound pressure – Comparison method for use in situ (ISO 3747:2000) EN ISO 4871:1996, Acoustics – Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996) EN ISO 9614-2:1996, Acoustics – Determination of sound-power levels of noise sources using sound intensity – Part 2: Measurement by scanning (ISO 9614-2:1996) EN ISO 11200:1995, Acoustics – Noise emitted by machinery and equipment – Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and other specified positions (ISO 11200:1995) EN ISO 11201:1995, Acoustics – Noise emitted by machinery and equipment – Measurement of emission sound pressure levels at a work station and at other specified positions – Engineering method in an essentially free field over a reflecting plane (ISO 11201:1995) EN ISO 11202:1995, Acoustics – Noise emitted by machinery and equipment – Measurement of emission sound pressure levels at a work station and at other specified positions – Survey method in situ (ISO 11202:1995) EN ISO 11203:1995, Acoustics – Noise emitted by machinery and equipment – Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level (ISO 11203:1995) EN ISO 11204:1995, Acoustics – Noise emitted by machinery and equipment – Measurement of emission sound pressure levels at a work station and at other specified positions – Method requiring environmental corrections (ISO 11204:1995) EN ISO 12001:1996, Acoustics – Noise emitted by machinery and equipment – Rules for the drafting and presentation of a noise test code (ISO 12001:1996) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply in addition to these given in EN ISO 12001:1996 and the basic standards (B-standards) for the determination of emission sound pressure levels at work station and other specified positions: EN ISO 11200:1995, EN ISO 11201:1995, EN ISO 11202:1995, EN ISO 11203:1995, EN ISO 11204:1995; and in the basic standards for the determination of sound power levels: EN ISO 3740:2000, EN ISO 3744:1995, EN ISO 3746:1995, EN ISO 9614-2:1996. 3.1 very large machine machine or packaging line where the greatest linear dimension exceeds 7 meters (Figure C.6, Annex C of EN ISO 3744:1995 or Figure C.6, Annex C of EN ISO 3746:1995)
NOTE See Figure 1.
Figure 1 — Very large machines SIST EN 415-9:2010
EN 415-9:2009 (E) 6 4 Description of machine under test The machines specified in this standard are listed in EN 415-1, and, for machines not listed, the manufacturer shall describe them in the test report. The packaging machine described by Annex D (informative) of this document includes any equipment, electric cabinet and optional devices, delivered with the machines, which contribute to the overall noise emission. 5 Determination of the emission sound pressure level at work station 5.1 Sound pressure level measurement at work station The A-weighted emission sound pressure level at the workstation LpA shall be determined in compliance with EN ISO 11201, EN ISO 11202, EN ISO 11203 or EN ISO 11204. The appropriate standard shall be selected by using Annex A (normative).
The positions of the work stations and of other specified positions shall be defined by the manufacturer in compliance with Annex D (informative). In all cases the microphone shall be located directly above the reference point on the ground plane on which the operator normally stands, at a distance of 1 m from the machine, at a nominal height of 1,6 m without an operator being present, and the microphone shall be directed towards the machine.
The emission sound pressure level at the work station and at other specified positions shall be determined, over a typical period of operation of the machine under test. The measurement time shall be at least 30 s and represent a minimum of 5 cycles.
For steady noise further measurement time can be reduced as stable value has been reached according to the characteristics of the instrument used. For unsteady noise levels it is important to specify carefully the period of observation; in particular an appropriate measuring period shall be selected and stated in the test report. For machines operating in a production line noise measurement shall be carried out after commissioning. 5.2 Background noise correction K1 Details about the evaluation of quantities related to the determination of the background noise correction K1 are provided in Annex B (normative). 5.3 Local environmental correction K3 Details about the evaluation of quantities related to the determination of the environmental correction K2 and of the local environmental correction K3 are provided in Annex B (normative).
6 Determination of the sound power level 6.1 General method Sound power level shall be determined in compliance with one of the following standards: EN ISO 3744, EN ISO 9614-2, EN ISO 3746, EN ISO 3747. See Annex C (normative) for guidance on the selection of the standard. SIST EN 415-9:2010
EN 415-9:2009 (E) 7 6.2 Alternative method for very large machines For very large machines, instead of the sound power level, it is permissible to determine and declare emission sound pressure levels at specified measurement points around the machine.
Such points shall be specified along a path around the machine at a height of 1,6 m above the ground plane on which the operator normally stands and at a distance of 1 m from the machine.
7 Assembly and installation conditions The machine shall be assembled and installed in compliance with the manufacturer's instructions. If several modes are possible, a typical condition shall be recommended by the manufacturer and a detailed description shall be stated in the test report. The assembling and installation conditions of the machine shall be identical for determining both the emission sound pressure level at the work places and other specified measuring points and the sound power level as specified in Annex
D (informative). Care shall be taken to avoid a significant amount of sound energy caused by the installation, the mounting system, set platforms, electrical conduits, piping or air ducts connected to the machine for the test. If an associated equipment necessary for operation of the machine under test is not supplied with the machine, it shall be located outside the test environment or, where this is not possible, its noise emission shall be considered as background noise. If resilient mounts are interposed between the machine and the foundation to reduce any structure borne noise transmission, technical specifications shall be given for these resilient mounts and their application shall be stated in the test report. 8 Operating conditions The definition of operating and environmental conditions is essential in order to determine the noise emission values. These operating conditions shall be representative of the intended use of the machine and shall be identical for determining both the emission sound pressure level at the work places and other specified measuring points and the sound power level, even where operating conditions are not defined. The operating conditions shall be stated in the test report as described in Annex D (informative). There are two different type of operating conditions: a) a constant noise emission level: this operating condition shall then be used for the measurement; b) a non-constant noise emission level: if so, the time of the principal work cycle shall be divided in a few parts, defined sub-cycles. Where work cycles are used for measurement and fluctuations of the A-weighted sound pressure level occurring during such cycles exceed 5 dB(A), the cycles shall be divided into operational sub-cycles during which specific operating conditions exist and Subclause 5.1 applies. Where subdividing the work cycle into sub-cycles is not possible, and the time-averaged sound pressure level shall be determined for the whole work cycle and be reported.
The machine under test shall be measured in typical usage with product intended to be used by the machine, at the nominal production speed as specified by the manufacturer, to reproduce the sound pressure level representative of normal use. If there are difficulties regarding a continuous operation of the machine with original product, e.g. unavailable products, perishable products, etc., the measurements shall be done with an artificial product, with the same noise emission characteristics as the foreseen product. Where this is not possible, the measurements shall be carried out, under the same conditions, without product. SIST EN 415-9:2010
EN 415-9:2009 (E) 8 On machine with varying applications, separate noise measurements shall be taken for the specific applications intended in compliance with Annex D (informative). In the case of machine or packaging line where final assembling can only be completed at the user’s production environment, the sound pressure level measurements shall be done in this final environment. The test report shall indicate all information concerning the machine or packaging line conditions, the environment and the type of product used for the measurements. 9 Measurement uncertainty The measurement uncertainty of the noise emission values will comply with the accuracy grade of the method applied. Accuracy grades are specified in the standards for determining emission sound pressure levels (see Clause 5) and sound power levels (see Clause 6). The standard deviation of reproducibility σR is expected as shown in Table 1. Table 1 — Expected standard deviation of reproducibility σσσσR
Applied Standard & Grade σσσσR (dB)
Applied Standard & Grade σσσσR (dB) EN ISO 11201, grade 2 < 2,5
EN ISO 3744, grade 2 < 1,5 EN ISO 11202, grade 3 < 5
EN ISO 3746, grade 3 < 4
EN ISO 11203, grade 2 or 3 According to sound power level standard
EN ISO 3747, grade 3 < 4 EN ISO 11204 grade 2 < 2,5
EN ISO 9614-2, grade 2 < 1,5 EN ISO 11204 grade 3 < 5,0
EN ISO 9614-2, grade 3 < 4
The estimate of the uncertainty affecting the measurement can be done accordingly with Subclause A.2.2 of EN ISO 4871:1996, starting from the values of standard deviation of reproducibility shown above. 10 Information to be recorded The information to be recorded covers all the technical requirements of this standard. Any deviation shall be recorded with the technical justification. 11 Information to be reported The test report of the noise measurements shall include the following information: a) Test data 1) place and date; 2) basic standard applied and the accuracy grade; 3) person responsible for the test; b) Machine data SIST EN 415-9:2010
EN 415-9:2009 (E) 9 1) manufacturer; 2) type and model; 3) serial number; 4) year of manufacture; 5) dimensions; 6) installation conditions; c) Machine operating conditions 1) running speed; 2) description of product; 3) location of machine in the test environment; d) Instrumentation 1) manufacturer, type, serial number and last calibration; 2) windscreen type (if used); e) Environmental parameters 1) physical parameter and dimensions; 2) description of walls, ceiling and floor; 3) acoustical qualification of room; f) Measurement conditions 1) reference surface dimensions; 2) distance of measurement and number of points; 3) measurement surface dimensions and area S; 4) background noise correction; 5) drawing of machine arrangement (lay-out) with work station; 6) drawing of machine arrangement (lay-out) with all measuring points; g) Sound pressure level: 1) background noise correction K1A; 2) environmental correction K2A ; 3) local environmental correction K3A; 4) A-weighted emission sound pressure level at work station LpA; 5) if required, C-weighted peak emission sound pressure level at work station LpCpeak; SIST EN 415-9:2010
EN 415-9:2009 (E) 10 6) uncertainty; 7) if required, impulse noise content at work station according to Annex D of EN ISO 3744:1995 or EN ISO 3746:1995; 8) when work cycles are split into sub-cycles, measuring results that shall be provided for each sub-cycle; h) Sound power level, if required: 1) A-weighted emission sound pressure levels at each measuring point; 2) A-weighted sound pressure levels of the background noise at each measuring point; 3) A-weighted surface-averaged sound pressure level; 4) measurement surface value: =0lg10SSLs
where S0 = 1 m2; 5) A-weighted sound power level LwA; 6) A-weighted emission sound pressure levels at each measuring point if Subclause 6.2 is used; 7) uncertainty. 12 Information and verification of noise emission values The information of the noise emission values is the sole responsibility of the manufacturer or his appointed representative. According to EN ISO 4871, dual number method shall be applied (see Annex B.2 of EN ISO 4871:1996). If machine specific values for the uncertainty K are unavailable, respective values shall be taken from A.2.2 of EN ISO 4871:1996, with K
= 1,645 σR where σR depends on used reference standards. The verification shall be done using the same assembly, installation and operating condition of the initial determination noise emission values. If this is not possible, the verification shall be carried out at condition being as close as possible to initial ones. Any divergences shall be documented. According to EN ISO 4871 dual number method, the uncertainty shall be only considered as a quality indicator of the measurement and shall not affect the noise measurement value indicated by the manufacturer.
SIST EN 415-9:2010
EN 415-9:2009 (E) 11 Annex A
(normative)
Selection of the appropriate standard for the measurement of the sound pressure level at the work station The standard EN ISO 11200 contains detailed procedure for the selection of the appropriate method for measuring the emission sound pressure level at the work station. The general concept is to always prefer the standard able to better accuracy and better rejection of causes of error. In this sense, the hierarchy of the standards is the following, in order of decreasing accuracy: 1) EN ISO 11201 (Engineering method in an essentially free field over a reflecting plane) 2) EN ISO 11203 (Engineering method from the sound power level) 3) EN ISO 11204 (Engineering method requiring environmental correction) 4) EN ISO 11202 (Survey method in situ) Whenever it is not possible to employ the top-ranked standard, the user shall switch to the following standard in the above list. Justification of the causes impeding to employ the rejected standards shall be given in the measurement report. The selection procedure shall be driven according to the following flowchart. SIST EN 415-9:2010
EN 415-9:2009 (E) 12
Figure A.1 — Flow Chart for the selection of the measurement standard for emission sound pressure level at the work station Description of the selection blocks: 1) It is assumed that it is possible to evaluate the environmental conditions before selecting the measurement standard. The condition of some industrial environments, as for example rooms with low height and large horizontal dimensions, lead to the assumption that the sound field is not perfectly diffuse. 2) Whenever a semi-anechoic room is available, or it is possible to test the machine outdoors, the preferred method is always EN ISO 11201. 3) Whenever sound power level LWA is measured, it is preferred to employ it for evaluating the emission sound pressure level at work station by means of EN ISO 11203, provided that it is possible to comply with the engineering grade limitations. NO SIST EN 415-9:2010
EN 415-9:2009 (E) 13 4) Whenever the previous methods cannot be employed, EN ISO 11204 is employed if the environmental conditions allow for its application with Grade 2 (engineering grade) accuracy. 5) Grade 3 (survey grade) methods are employed when the conditions previously set for the application of grade 2 (engineering) methods cannot be fulfilled. However, survey grade methods could also be employed when operating conditions of the machines do not allow for long measurement times, e.g. due to lacking of product to be processed or to other operational limitations during the test. 6) The standard EN ISO 11204 takes into account the case of sound sources with strong directivity. When the sound source is not highly directive, the standard EN ISO 11202 is applicable. However, these standards operate correctly only under strict conditions of diffuse sound field. If the sound field is not perfectly diffuse, the evaluation of environmental correction factor K2 and of local environmental correction factor K3 is possible following the guidance given in Annex B. 7) When the background noise is very high, or the environmental correction factor is a great number, or the sound field is not complying with the assumption of a diffuse field, the only way of estimating the emission pressure level at the work station is to measure the sound power level of the machine employing the sound intensity method (EN ISO 9614-2) with survey grade and to derive the sound pressure level at the work station by means of EN ISO 11203. NOTE 1 The diffuse field occurs when, in the test environment, the sound waves are repeatedly reflected in all directions with equal magnitude and probability (e.g. industrial environment with flat and smooth ceiling and walls). NOTE 2 The directive source occurs when the emission sound pressure level of the source is mainly headed in only one direction. SIST EN 415-9:2010
EN 415-9:2009 (E) 14 Annex B (normative)
Evaluation of local environmental correction K3 B.1 Background noise correction K1 The background noise correction K1 is evaluated according to the following formula: []L1.01101lg10K∆⋅−−⋅−= (B.1) where
∆L
is the difference between the sound pressure level measured, at a specified position, with the machine under test in operation and turned off, respectively. When the machine to be tested can operate only as part of a production line, the noise emission of the other components of the line has to be interpreted as background noise, which could be too high and thus unacceptable, (K1 > 3 dB). Furthermore, it is not possible to turn off the machine under test, while leaving the other components of the production line operational. In this case, the following options are available: 1) If the manufacturer is only responsible of the noise emitted by the single machine, the only viable method is to determine the sound power level by applying the sound intensity measurement method
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