EN ISO 15744:2008

Hand-held non-electric power tools - Noise measurement code - Engineering method (grade 2) (ISO 15744:2002)

This International Standard specifies test methods for the measurement, determination and declaration of the noise emission from hand-held non-electric power tools. It prescribes the loading and working conditions under which can be determined
the noise emission, under specified load conditions, expressed as the sound power level, andthe emission sound pressure level at the work station under specified load conditions.
This International Standard is applicable to typical hand-held non-electric power tools including rotary tools, orbital and random orbital sanders, rotary and non-rotary reciprocating and percussive tools and a variety of assembly tools. It is not applicable to cartridge-operated tools, fastener driving tools (e.g. nailers, staplers) or any tool powered by an internal combustion engine, nor is it applicable to breakers or other power tools which, when placed on the market, are required to meet the provisions of legislation specifying test methods and imposing limits on noise emission from, for example, equipment used outdoors.
NOTE The noise code could also be applied to other equipment such as winches, pneumatic motors, auto-feed drills and tappers, pumps, hydraulic motors and screw feed systems, provided their principles of operation were in accordance with those of pneumatic and hydraulic equipment.

Handgehaltene nicht-elektrisch betriebene Maschinen - Geräuschmessverfahren - Verfahren der Genauigkeitsklasse 2 (ISO 15744:2002)

Machines portatives à moteur non électrique - Code pour le mesurage du bruit - Méthode d'expertise (classe de précision 2) (ISO 15744:2002)

L'ISO 15744:2002 spécifie les méthodes pour le mesurage, la détermination et la déclaration de l'émission sonore provenant des machines portatives à moteur non électrique. Elle prescrit les conditions de charge et de fonctionnement sous lesquelles peuvent être déterminés
l'émission sonore, sous des conditions de charges spécifiées, exprimée comme étant le niveau de puissance acoustique, etle niveau de pression acoustique d'émission au poste de travail, sous des conditions de charges spécifiées.
L'ISO 15744:2002 est applicable aux machines portatives à moteur non électrique typiques, y compris les outils rotatifs, les ponceuses orbitales et les ponceuses orbitales spéciales, les outils alternatifs et à percussion rotatifs et non rotatifs et une variété de machines d'assemblage. Elle n'est pas applicable ni aux machines fonctionnant à l'aide d'une cartouche, ni aux machines alimentées par un moteur à combustion interne entraînant des éléments de fixation (par exemple marteaux cloueurs, agrafeurs) ou un outil quelconque, ni aux marteaux brise-béton ou autres machines à moteur qui, lorsqu'ils sont mis sur le marché, doivent répondre à des législations spécifiant les méthodes d'essai et imposant les limites sur l'émission de bruit provenant, par exemple, des équipements utilisés à l'extérieur.
NOTE Le code pour le mesurage du bruit peut être également appliqué à d'autres matériels tels que les treuils, les moteurs pneumatiques, les perceuses et les taraudeuses à avance automatique, les pompes, les moteurs hydrauliques et les systèmes d'alimentation à vis sans fin, à condition que leurs principes de fonctionnement soient conformes avec ceux de matériel pneumatique et hydraulique.

Neelektrična ročna orodja - Merjenje hrupa - Tehnične metode (2. stopnja) (ISO 15744:2002)

General Information

• Status: Published
• Publication Date: 05-Aug-2008
• Withdrawal Date: 27-Dec-2009
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 25.140.01 - Hand-held tools in general
• Technical Committee: CEN/TC 255 - Hand-held, non-electric power tools - Safety
• Drafting Committee: CEN/TC 255 - Hand-held, non-electric power tools - Safety
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Aug-2008
• Completion Date: 06-Aug-2008
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 98/37/EC - Machinery
• Mandate: M/079 - Mandate to CEN and CENELEC for standardization in the field of machines
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Ref Project: SIST EN ISO 15744:2008 - Hand-held non-electric power tools - Noise measurement code - Engineering method (grade 2) (ISO 15744:2002)

Relations

• Replaces: EN ISO 15744:2002 - Hand-held non-electric power tools - Noise measurement code - Engineering method (grade 2) (ISO 15744:2002)
• Effective Date: 22-Dec-2008

Overview

EN ISO 15744:2008 - Hand‑held non‑electric power tools - Noise measurement code - Engineering method (grade 2) (ISO 15744:2002) is a CEN‑adopted international standard that specifies test methods for measuring, determining and declaring noise emissions from hand‑held non‑electric power tools. The standard defines how to obtain the sound power level of a tool and the emission sound pressure level at the work station under prescribed loading and working conditions. It applies to a wide range of pneumatic and hydraulic hand‑held tools (rotary tools, orbital sanders, reciprocating and percussive tools, assembly tools) while excluding cartridge‑operated tools, fastener‑driving tools, internal‑combustion‑powered tools and certain breakers covered by other legislation.

Key topics and requirements

• Scope and applicability: Tools covered and explicitly excluded; note that the code can be applied to other pneumatic/hydraulic equipment by analogy.
• Sound power determination: Measurement surface selection and calculation method for deriving sound power level (Lw) in engineering (grade 2) conditions.
• Emission sound pressure at workstation: Procedures to determine A‑weighted emission sound pressure level (LpA) and C‑weighted peak levels at operator position.
• Loading and operating conditions: Prescribed loading devices, mounting and running conditions for representative on‑load or no‑load testing to ensure reproducible, comparable results.
• Installation and mounting: How tools should be mounted and fixed during tests to prevent extraneous noise or vibration influences.
• Measurement uncertainty and reporting: Procedures to estimate uncertainty, record test conditions, generate test reports and declare noise emission values.
• Conformity linkage: Informative annexes map the standard to EU Directives (e.g., 98/37/EC and 2006/42/EC), supporting presumption of conformity when cited.

Practical applications

• Product noise declaration for brochures, datasheets and compliance markings
• Comparative acoustic performance testing during R&D and design iterations
• Type testing by accredited laboratories to support CE conformity assessment
• Procurement specifications and supplier evaluations based on sound power and emission pressure values
• Input for workplace risk assessments and hearing conservation planning (note: declared emission levels may not equal actual operator exposure in real use)

Who uses this standard

• Tool manufacturers and R&D engineers
• Accredited acoustic test laboratories
• Certification and conformity assessment bodies
• Occupational health & safety professionals and procurement teams
• Acoustical consultants advising on tool selection and noise control

Related standards

• ISO 3744 - Determination of sound power using sound pressure in a free field over a reflecting plane
• ISO 2787 - Performance tests for rotary and percussive pneumatic tools
• ISO 4871 - Acoustics - Declaration and verification of noise emission values

Keywords: EN ISO 15744:2008, hand‑held non‑electric power tools, noise measurement, sound power level, emission sound pressure level, engineering method grade 2, CEN, noise emission testing.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Handgehaltene nicht-elektrisch betriebene Maschinen - Geräuschmessverfahren - Verfahren der Genauigkeitsklasse 2 (ISO 15744:2002)Machines portatives à moteur non électrique - Code pour le mesurage du bruit - Méthode d'expertise (classe de précision 2) (ISO 15744:2002)Hand-held non-electric power tools - Noise measurement code - Engineering method (grade 2) (ISO 15744:2002)25.140.01Hand-held tools in general17.140.20Emisija hrupa naprav in opremeNoise emitted by machines and equipmentICS:Ta slovenski standard je istoveten z:EN ISO 15744:2008SIST EN ISO 15744:2008en01-november-2008SIST EN ISO 15744:2008SLOVENSKI
STANDARDSIST EN ISO 15744:20031DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 15744August 2008ICS 17.140.20; 25.140.01Supersedes EN ISO 15744:2002
English VersionHand-held non-electric power tools - Noise measurement code -Engineering method (grade 2) (ISO 15744:2002)Machines portatives à moteur non électrique - Code pour lemesurage du bruit - Méthode d'expertise (classe deprécision 2) (ISO 15744:2002)Handgehaltene nicht-elektrisch betriebene Maschinen -Geräuschmessverfahren - Verfahren derGenauigkeitsklasse 2 (ISO 15744:2002)This European Standard was approved by CEN on 18 July 2008.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: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 15744:2008: ESIST EN ISO 15744:2008

Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC.4 Annex ZB (informative)
Relationship between this
European
Standard and the Essential Requirements
of EU Directive 2006/42/EC.5
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 98/37/EC on machinery, amended by 98/79/EC. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard.
Relationship between this
European
Standard and the Essential Requirements
of EU Directive 2006/42/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 2006/42/EC on machinery. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard. SIST EN ISO 15744:2008

Reference numberISO 15744:2002(E)© ISO 2002
INTERNATIONAL STANDARD ISO15744First edition2002-03-15Hand-held non-electric power tools — Noise measurement code — Engineering method (grade 2) Machines à moteur portatives non électriques — Code pour le mesurage du bruit — Méthode d'expertise (classe de précision 2)
ISO 15744:2002(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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ISO 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
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ii © ISO 2002 – All rights reserved
ISO 15744:2002(E) © ISO 2002 – All rights reserved iii Contents Page Foreword.iv Introduction.v 1 Scope.1 2 Normative references.1 3 Terms, definitions and symbols.2 4 Machinery families.5 4.1 Applicability of this International Standard.5 4.2 Other equipment.6 5 Sound power level determination.6 5.1 General.6 5.2 Measurement surface.6 5.3 Calculation.7 6 Emission sound pressure level determination.8 6.1 A-weighted emission sound pressure level at the work station.8 6.2 C-weighted peak emission sound pressure level at the work station.9 7 Power tool installation and mounting during noise tests.9 7.1 General.9 7.2 Loading devices.9 8 Loading and operating conditions.10 8.1 General.10 8.2 Orbital and random orbital sanders.11 8.3 Non-rotary percussive tools.12 8.4 Needle scalers.13 8.5 Rotary percussive tools.14 8.6 Ratcheting screwdrivers, impact wrenches and impulse wrenches.15 9 Measurement uncertainty.16 10 Information to be recorded.16 11 Test report.18 12 Declaration and verification of noise emission values.18 Annex A (informative)
Model test report.20 Annex B (informative)
Model form for declared noise emission values.21 Annex C (informative)
Technical justification for selection of measurement surface and method of sound power calculation.22 Bibliography.24
ISO 15744:2002(E) iv © ISO 2002 – 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 3. 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15744 was prepared by Technical Committee ISO/TC 118, Compressors, pneumatic tools and pneumatic machines, Subcommittee SC 3, Pneumatic tools and machines. Annexes A, B and C of this International Standard are for information only. SIST EN ISO 15744:2008

ISO 15744:2002(E) © ISO 2002 – All rights reserved v Introduction The noise test code presented by this International Standard gives methods for determining and declaring the noise emission values of hand-held non-electric power tools: i.e. the total noise level from the power tool expressed as sound power level and as the emission sound pressure level at the work station. These methods have been designed to give results that make it possible to compare the acoustic performance of various power tools. The power tools are either run at no load, when this gives a representative value, or in an on-load condition but with the process noise muffled so that it is well below the noise level of the power tool. The methods were chosen to give a satisfactory reproducibility of results and are based on present practice in industry. For many power tools in a real work situation the noise from the process dominates the total noise emission in actual use. The process noise varies within very wide limits and cannot be predicted. Users are cautioned that the emission sound pressure level as determined by this code may not be representative of actual operator exposure levels, which are unique characteristics of individual applications and environmental factors beyond the control of the manufacturers of the equipment covered by this International Standard, and are under the exclusive control (and therefore the responsibility) of the users of the equipment. This International Standard was prepared with the assistance of both PNEUROP, the European body representing manufacturers of compressors, vacuum pumps, pneumatic tools, pneumatic machines and allied equipment, and CAGI, the compressed air and gas institute, in the United States. SIST EN ISO 15744:2008

INTERNATIONAL STANDARD ISO 15744:2002(E) © ISO 2002 – All rights reserved 1 Hand-held non-electric power tools — Noise measurement code — Engineering method (grade 2)
1 Scope This International Standard specifies methods for the measurement, determination and declaration of the noise emission from hand-held non-electric power tools. It prescribes the loading and working conditions under which can be determined a) the noise emission, under specified load conditions, expressed as the sound power level, and b) the emission sound pressure level at the work station under specified load conditions. This International Standard is applicable to typical hand-held non-electric power tools including rotary tools, orbital and random orbital sanders, rotary and non-rotary reciprocating and percussive tools and a variety of assembly tools. It is not applicable to cartridge-operated tools, fastener driving tools (e.g. nailers, staplers) or any tool powered by an internal combustion engine, nor is it applicable to breakers or other power tools which, when placed on the market, are required to meet the provisions of legislation specifying test methods and imposing limits on noise emission from, for example, equipment used outdoors. NOTE This noise measurement code could also be applied to other equipment such as winches, pneumatic motors, auto-feed drills and tappers, pumps, hydraulic motors and screw feed systems, provided their principles of operation were in accordance with those of pneumatic and hydraulic equipment. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 2787:1984, Rotary and percussive pneumatic tools — Performance tests ISO 3744:1994, Acoustics — Determination of sound power levels of noise sources using sound pressure — Engineering method in an essentially free field over a reflecting plane ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and equipment ISO 5391, Pneumatic tools and machines — Vocabulary ISO 8662-2, Hand-held portable power tools — Measurement of vibrations at the handle — Part 2: Chipping hammers and riveting hammers ISO 8662-3, Hand-held portable power tools — Measurement of vibrations at the handle — Part 3: Rock drills and rotary hammers ISO 8662-7, Hand-held portable power tools — Measurement of vibrations at the handle — Part 7: Wrenches, screwdrivers and nut runners with impact, impulse or ratchet action ISO 8662-8, Hand-held portable power tools — Measurement of vibrations at the handle — Part 8: Polishers and rotary, orbital and random orbital sanders SIST EN ISO 15744:2008

ISO 15744:2002(E) 2 © ISO 2002 – All rights reserved
ISO 8662-14, Hand-held portable power tools — Measurement of vibrations at the handle — Part 14: Stone-working tools and needle scalers 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 IEC 60651, Sound level meters IEC 60804, Integrating-averaging sound level meters EN 292-2:1991, Safety of machinery — Basic concepts, general principles for design — Part 2: Technical principles and specifications 3 Terms, definitions and symbols For the purposes of this International Standard, the terms and definitions given in ISO 5391 and the following apply. For the symbols, see Table 1. 3.1 declared dual-number noise emission value L, K measured noise emission value, L, and its associated uncertainty K, both rounded to the nearest decibel [ISO 4871:1996] 3.2 emission airborne sound radiated by a well-defined noise source (e.g. the machine under test) [ISO 11203:1995] NOTE Emission values may be incorporated in a product label or published in a product specification, or both these. The basic noise emission descriptors are the sound power level of the product itself and the emission sound pressure levels at the work station and at other specified positions (if any) in the vicinity of the product. 3.3 emission sound pressure p sound pressure, at a specified position near a noise source, when the source is in operation under specified operating and mounting conditions on a reflecting plane surface, excluding the effects of background noise as well as the effects of reflections other than those from the plane or planes permitted for the purpose of the test; expressed in pascals [ISO 11203:1995] 3.4 emission sound pressure level Lp ten times the logarithm to the base 10 of the ratio of the square of the emission sound pressure, p2(t), to the square of the reference sound pressure, 20,pmeasured with a particular time weighting and a particular frequency weighting selected from those defined in IEC 60651; expressed in decibels NOTE 1 The reference sound pressure is 20 µPa. NOTE 2 Adapted from ISO 11203:1995. SIST EN ISO 15744:2008

ISO 15744:2002(E) © ISO 2002 – All rights reserved 3 3.5 hand-held power tool
power tool driven by a rotary or linear motor powered by compressed air, hydraulic fluid, gaseous or liquid fuel, electricity or stored energy (e.g. by a spring) to do mechanical work and so designed that the motor and the mechanism form an assembly that can easily be brought to its place of operation NOTE The power tool can be operated using one or two hands. 3.6 inserted tool tool inserted in the hand-held power tool to perform the intended work 3.7 loading device device providing a simulated work piece for a hand-held power tool under test conditions 3.8 noise emission declaration information on the noise emitted by the machine, given by the manufacturer or supplier in technical documents or other literature concerning noise emission values NOTE 1 The noise emission declaration may take the form of either the declared single-number noise emission value or the declared dual-number value.
NOTE 2 Adapted from ISO 4871:1996. 3.9 no-load speed free speed idling speed rotational speed of the output spindle, with no inserted tool mounted, subject to no external load, and operated at maximum energy supply as specified by the manufacturer; expressed in revolutions per minute 3.10 normal sound intensity level InL ten times the logarithm to the base 10 of the ratio of the component of the sound intensity, in the direction normal (perpendicular) to the measurement surface, to the reference sound intensity; expressed in decibels
NOTE The reference sound intensity is 10−12 W/m2. 3.11 work station operator’s position position in the vicinity of the machine under test which is intended for the operator [ISO 11203:1995] 3.12 sound intensity time-averaged value of the rate of flow of sound energy per unit of surface area in the direction of the local instantaneous acoustic particle velocity 3.13 sound power W rate per unit time at which airborne sound energy is radiated by a source, expressed in watts [ISO 3744:1994] SIST EN ISO 15744:2008

ISO 15744:2002(E) 4 © ISO 2002 – All rights reserved
3.14 sound power level LW ten times the logarithm to the base 10 of the ratio of the sound power radiated by the sound source under test to the reference sound power, expressed in decibels NOTE 1 The frequency weighting or the width of the frequency band used is indicated, for example: A-weighted sound power level, LWA. NOTE 2 The reference sound power is 1 pW (10–12 W). NOTE 3 Adapted from ISO 3744:1994. 3.15 standard deviation of reproducibility σR standard deviation of noise emission values obtained under reproducibility conditions: i.e. the repeated application of the same noise emission measurement method on the same noise source at different times and under different conditions (different laboratory, different operator, different apparatus), and therefore including the standard deviation of repeatability NOTE Adapted from ISO 4871:1996. 3.16 surface sound pressure level fpL energy-average of the time-averaged sound pressure levels at all microphone positions on the measurement surface, expressed in decibels, with background noise correction K1 and environmental correction K2 applied [ISO 3744:1994] NOTE 1 See Table 1 for equivalent A-weighted symbol. NOTE 2 The background noise correction K1 and the environmental correction K2 are defined in ISO 3744:1994. 3.17 time-averaged emission sound pressure level LpeqT
emission sound pressure level of a continuous steady sound that, within a measurement time interval, T, has the same mean square sound pressure as a sound under consideration which varies with time; expressed in decibels [ISO 11203:1995] NOTE See Table 1 for equivalent A-weighted symbol. 3.18 uncertainty K value of the measurement uncertainty associated with a measured noise emission value, expressed in decibels [ISO 4871:1996] SIST EN ISO 15744:2008

ISO 15744:2002(E) © ISO 2002 – All rights reserved 5 Table 1 — Symbols Symbol Description D Diameter of energy absorber
FA Feed force
K1, K1A Background noise correction, A-weighted background noise correction
K2, K2A Environmental correction, A-weighted environmental correction KWA, KpA, KpC,peak Measurement uncertainties L Noise emission value L Arithmetical mean of noise emission values InL Normal sound intensity level Lp
Emission sound pressure level
LpeqT Time-averaged emission sound pressure level
LpAeqT A-weighted time-averaged emission sound pressure level (usually abbreviated to LpA) a LpC,peak
C-weighted peak emission sound pressure level fpL, fApL Surface sound pressure level, A-weighted surface sound pressure level ApiL¢ A-weighted sound pressure level measured at the i-th microphone position
LW , LWA Sound power level, A-weighted sound power level Q Numerical difference between LWA and LpA R Measurement surface hemisphere radius and cylinder radius S Measurement surface area h
Free length of inserted tool σ R Standard deviation of reproducibility
a It shall be measured with an instrument which complies with the requirements of IEC 60804.
4 Machinery families 4.1 Applicability of this International Standard The hand-held non-electric power tools to which this International Standard is applicable comprise a range of types and models, based on similar mechanical parts, technology and design, and giving similar acoustic properties. They can be grouped into the following families: a) rotary tools, including drills, tappers, grinders, belt sanders, polishers, rotary files, rotary sanders, die grinders and circular saws; b) orbital and random orbital sanders; c) rotary reciprocating tools, including jig saws, nibblers, oscillating saws, reciprocating saws, reciprocating files and shears, having a rotary drive; SIST EN ISO 15744:2008

ISO 15744:2002(E) 6 © ISO 2002 – All rights reserved
d) non-rotary reciprocating tools, including reciprocating saws, files and knives and oscillating saws and knives, having a non-rotary drive; e) percussive non-rotary tools =where the piston and working tools are in two parts (not integrated), such as chipping hammers and riveting hammers, =where the piston itself is the working tool, such as rammers, tampers and scaling hammers, and =needle scalers; f) percussive rotary tools, including drifters, plug-hole drills, rotary hammers, rock drills and stopers; g) non-impact assembly tools, such as non-ratchet screwdrivers and nut-runners; h) ratcheting assembly tools, including screwdrivers and wrenches with ratchet clutches (also known as slip clutches), and pawl-type ratchet wrenches; i) impact assembly tools, such as impact wrenches and screwdrivers, and air-hydraulic impulse wrenches and screwdrivers. See also Table 2. 4.2 Other equipment The use of this International Standard may be extended to other equipment that does not have a dedicated noise test code, provided the principles of operation of that equipment accord with the general principles for the operation of pneumatic and hydraulic equipment. EXAMPLES Winches, pneumatic motors, auto-feed drills and tappers, pumps, hydraulic motors, screw feed systems. 5 Sound power level determination 5.1 General The acoustic environment, instrumentation, quantities to be measured and determined, and measurement procedure shall be as specified in ISO 3744:1994. The sound power level shall be given as an A-weighted sound power level i
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