EN ISO 22868:2021

Forestry and gardening machinery - Noise test code for portable hand-held machines with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO 22868:2021)

This document specifies a noise test code for determining, efficiently and under standardized conditions, the common noise emission characteristics of portable, hand-held, combustion engine powered forest and garden machines, and specific requirements for chain-saws, brush-cutters, grass-trimmers, edgers, pole-mounted powered pruners, hedge-trimmers and garden blowers/vacuums/knapsack mist blowers. Noise emission characteristics include the A-weighted emission sound pressure level at the operator position and the A-weighted sound power level.
Noise test codes as described in this document enable the manufacturer to verify the effort regarding low noise design.

Forst- und Gartenmaschinen - Geräuschmessnorm für handgehaltene Maschinen mit Verbrennungsmotor - Verfahren der Genauigkeitsklasse 2 (ISO 22868:2021)

Dieses Dokument legt ein Geräuschmessverfahren zur effizienten Ermittlung der Geräuschemissionsdaten von tragbaren handgeführten forstwirtschaftlichen Maschinen und Gartengeräten mit Verbrennungsmotor unter einheitlichen Bedingungen und besondere Anforderungen für Kettensägen, Freischneider, Grastrimmer, Kantenschneider, motorbetriebene Hochentaster, Heckenscheren und Laubbläser/Laubsauger/rückentragbare Sprühgeräte fest. Geräuschemissions-Kennwerte schließen den A-bewerteten Emissions-Schalldruckpegel am Ort der Bedienungsperson und den A-bewerteten Schallleistungspegel ein.
Die in diesem Dokument beschriebenen Prüfmessverfahren ermöglichen dem Hersteller, die Bemühungen in Bezug auf geräuscharme Konstruktion zu prüfen.
VORSICHT – Einige der in diesem Dokument festgelegten Prüfverfahren beinhalten Vorgänge, die zu einer Gefährdungssituation führen können. Jede Person, die Prüfungen nach diesem Dokument durchführt, muss für die auszuführenden Arbeiten geschult sein.

Machines forestières et machines de jardin - Code d'essai acoustique pour machines portatives tenues à la main à moteur à combustion interne - Méthode d'expertise (classe de précision 2) (ISO 22868:2021)

Le présent document spécifie un code d'essai acoustique pour déterminer, avec efficacité et dans des conditions normalisées, les caractéristiques acoustiques d'émission des machines forestières et des machines de jardin portatives tenues à la main à moteur à combustion interne, telles que les scies à chaîne, débroussailleuses, coupe-herbe, meuleuses, perches élagueuses à moteur, taille-haies et souffleurs/aspirateurs de jardin/nébulisateurs portés à dos. Les caractéristiques acoustiques d'émission comprennent le niveau de pression acoustique d'émission pondéré A au poste de travail et le niveau de puissance acoustique pondéré A.
Les codes d'essai acoustique décrits dans le présent document permettent au fabricant de vérifier l'effort de conception à faible bruit.

Gozdarski in vrtnarski stroji - Standard za meritev hrupa ročno vodenih strojev, gnanih z motorjem z notranjim zgorevanjem - Postopek meritve (razred natančnosti 2) (ISO 22868:2021)

General Information

• Status: Published
• Publication Date: 30-Mar-2021
• Withdrawal Date: 29-Sep-2021
• ICS: 13.140 - Noise with respect to human beings
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 65.060.80 - Forestry equipment
• Technical Committee: CEN/TC 144 - Tractors and machinery for agriculture and forestry
• Drafting Committee: CEN/TC 144/WG 6 - Manually portable forestry machinery
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 31-Mar-2021
• Completion Date: 31-Mar-2021
• 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)
• 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 22868:2021 - Forestry and gardening machinery - Noise test code for portable hand-held machines with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO 22868:2021)

Relations

• Replaces: EN ISO 22868:2011 - Forestry and gardening machinery - Noise test code for portable hand-held machines with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO 22868:2011)
• Effective Date: 07-Apr-2021

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 22868:2021
01-junij-2021
Nadomešča:
SIST EN ISO 22868:2011
Gozdarski in vrtnarski stroji - Standard za meritev hrupa ročno vodenih strojev,
gnanih z motorjem z notranjim zgorevanjem - Postopek meritve (razred
natančnosti 2) (ISO 22868:2021)

Forestry and gardening machinery - Noise test code for portable hand-held machines

with internal combustion engine - Engineering method (Grade 2 accuracy) (ISO
22868:2021)
Forst- und Gartenmaschinen - Geräuschmessnorm für handgehaltene Maschinen mit
Verbrennungsmotor - Verfahren der Genauigkeitsklasse 2 (ISO 22868:2021)

Machines forestières et machines de jardin - Code d'essai acoustique pour machines

portatives tenues à la main à moteur à combustion interne - Méthode d'expertise (classe

de précision 2) (ISO 22868:2021)
Ta slovenski standard je istoveten z: EN ISO 22868:2021
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
65.060.80 Gozdarska oprema Forestry equipment
SIST EN ISO 22868:2021 en,fr,de

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

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SIST EN ISO 22868:2021
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SIST EN ISO 22868:2021
EN ISO 22868
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 13.140; 17.140.20; 65.060.80 Supersedes EN ISO 22868:2011
English Version
Forestry and gardening machinery - Noise test code for
portable hand-held machines with internal combustion
engine - Engineering method (Grade 2 accuracy) (ISO
22868:2021)

Machines forestières et machines de jardin - Code Forst- und Gartenmaschinen - Geräuschmessnorm für

d'essai acoustique pour machines portatives tenues à handgehaltene Maschinen mit Verbrennungsmotor -

la main à moteur à combustion interne - Méthode Verfahren der Genauigkeitsklasse 2 (ISO 22868:2021)

d'expertise (classe de précision 2) (ISO 22868:2021)
This European Standard was approved by CEN on 23 August 2020.

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

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

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

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

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

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

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

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22868:2021 E

worldwide for CEN national Members.
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SIST EN ISO 22868:2021
EN ISO 22868:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Annex ZA (informative) Relationship between this European Standard and the

requirements of EU Directive 2006/42/EC aimed to be covered .................................................. 4

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SIST EN ISO 22868:2021
EN ISO 22868:2021 (E)
European foreword

This document (EN ISO 22868:2021) has been prepared by Technical Committee ISO/TC 23 "Tractors

and machinery for agriculture and forestry" in collaboration with Technical Committee CEN/TC 144

“Tractors and machinery for agriculture and forestry” the secretariat of which is held by AFNOR.

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 September 2021, and conflicting national standards

shall be withdrawn at the latest by September 2021.

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 22868:2011.

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(s).

For the relationship with EU Directive(s) 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, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 22868:2021 has been approved by CEN as EN ISO 22868:2021 without any modification.

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SIST EN ISO 22868:2021
EN ISO 22868:2021 (E)
Annex ZA
(informative)
Relationship between this European Standard and the requirements of EU
Directive 2006/42/EC aimed to be covered

This European Standard has been prepared under a Commission’s standardization request

“M/396 Mandate to CEN and CENELEC for Standardisation in the field of machinery” to provide one

voluntary means of conforming to essential requirements of 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).

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 2006/42/EC
The relevant Clause(s)/sub-clause(s) Remarks/Notes
Essential Requirements of of this EN
Directive 2006/42/EC
1.5.8 Noise 4, 5, 6, 7, 8, 9 and Annexes A to

1.7.4.2(u) Contents of the 4, 5, 6, 7, 8, 9 and Annexes A to Annexes A, B, D and E do not

instructions — information E provide presumption of
on airborne noise emissions conformity regarding the
determination of the A-
weighted sound power level

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.
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SIST EN ISO 22868:2021
INTERNATIONAL ISO
STANDARD 22868
Third edition
2021-01
Forestry and gardening machinery —
Noise test code for portable hand-
held machines with internal
combustion engine — Engineering
method (Grade 2 accuracy)
Machines forestières et machines de jardin — Code d'essai
acoustique pour machines portatives tenues à la main à moteur à
combustion interne — Méthode d'expertise (classe de précision 2)
Reference number
ISO 22868:2021(E)
ISO 2021
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SIST EN ISO 22868:2021
ISO 22868:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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SIST EN ISO 22868:2021
ISO 22868:2021(E)
Contents Page

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

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

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

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

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

4 Quantities to be measured and quantities to be determined ................................................................................ 2

5 A-weighted sound power level determination ...................................................................................................................... 2

6 A-weighted emission sound pressure level measurement at the operator position .....................4

6.1 General ........................................................................................................................................................................................................... 4

6.2 Requirements for artificial surface ........................................................................................................................................ 4

6.3 Requirements for natural ground surface ....................................................................................................................... 5

7 Testing and operating conditions ....................................................................................................................................................... 5

8 Information to be reported ....................................................................................................................................................................... 6

8.1 General ........................................................................................................................................................................................................... 6

8.2 A-weighted emission sound pressure level determination .............................................................................. 7

8.3 A-weighted surface average sound pressure level determination ............................................................. 7

8.4 A-weighted sound power level determination ............................................................................................................ 8

9 Declaration and verification of noise emission values ................................................................................................. 9

Annex A (normative) Specific conditions for chain-saws (see Clause 7) .....................................................................10

Annex B (normative) Specific conditions for brush-cutters, grass-trimmers and edgers

(see Clause 7) ........................................................................................................................................................................................................14

Annex C (normative) Specific conditions for pole-mounted powered pruners (see Clause 7).............20

Annex D (normative) Specific conditions for hedge-trimmers (see Clause 7) ......................................................24

Annex E (normative) Specific conditions for garden blowers/vacuums/knapsack mist

blowers (see Clause 7) .................................................................................................................................................................................28

Annex F (informative) Example of water brake mounted on chain-saw guide bar to simulate

cutting ...........................................................................................................................................................................................................................35

Annex G (informative) Summary of results from round robin tests 2007 and 2008 on single

chain-saw, brush-cutter and grass-trimmer .........................................................................................................................36

Annex H (informative) A-weighted sound power level determination and declaration
according to the EU Directive on noise emission in the environment by equipment

for use outdoors, 2000/14/EC ............................................................................................................................................................37

© ISO 2021 – All rights reserved iii
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SIST EN ISO 22868:2021
ISO 22868:2021(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

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. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 23, Tractors and machinery for agriculture

and forestry, Subcommittee SC 17, Manually portable forest machinery, in collaboration with the European

Committee for Standardization (CEN) Technical Committee CEN/TC 144, Tractors and machinery for

agriculture and forestry, in accordance with the Agreement on technical cooperation between ISO and

CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 22868:2011), which has been technically

revised. The main changes compared to the previous edition are as follows:
— inclusion of edgers and knapsack mist blowers in the scope;

— correction of the calculation of microphone positions for the hemisphere (Figure 1) according to

ISO 3744:2010;

— alignment of the operation conditions for the determination of the sound power level with those for

the determination of the emission sound pressure level;

— lateral width of the test timber for chain-saw testing reduced to 150 mm to account for small

machines with short guide bars;
— inclusion of edgers in the specific conditions described in Annex B;

— amendments in Annex E to include knapsack mist blowers and better describe the set-up of the

machines with different blower tubes;

— editorial corrections and update of all figures as well as addition of new figures for edgers and mist

blowers;
— several text changes have been made for better understanding.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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SIST EN ISO 22868:2021
ISO 22868:2021(E)
Introduction
This document is a type-C standard as stated in ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organisations, market surveillance, etc.)

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events

are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or B

standards, the requirements of this type-C standard take precedence over the requirements of the

other standards for machines that have been designed and built according to the requirements of this

type-C standard.

During the first steps in the preparation of this document, it became obvious that the repeatability

of the test results could become better if the operator were to be replaced by a simulation process,

representing the normal operating modes with chain-saws and grass-trimmers/brush-cutters.

Furthermore, it was found that the cutting process performed with chain-saws causes considerable

deviations, which are not related to the measured object but to the test procedure itself.

Based on these observations, it was concluded that the operators in both test procedures, i.e. for chain-

saws and grass-trimmers/brush-cutters, ought to be replaced by a defined fixture and the cutting

process with chain-saws by a brake simulating the load. In this manner, the operating conditions during

measurement would simulate normal operating conditions.
The determination of noise emission characteristics is primarily intended for
— the manufacturers' declarations of noise emitted,
— comparing the noise emitted by machines in the family concerned, and
— purposes of noise control at source at the design stage.

The use of this noise test code will ensure reproducibility of the determination of the noise emission

characteristics within specified limits determined by the grade of accuracy of the basic noise

measurement method used. Noise measurement methods allowed by this document give results with

Grade 2 accuracy.

The operating modes specified for the tests are consistent with those involved in the assessment of the

exposure sound pressure levels, for example, over a typical working day.

NOTE Exposure sound pressure levels are the mean sound pressure levels experienced by the operator over

a defined period of time.
© ISO 2021 – All rights reserved v
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SIST EN ISO 22868:2021
ISO 22868:2021(E)

The work cycles chosen for this test code are based on the following considerations of application:

a) chain-saws with an engine of < 80 cm are used for various operations, including felling, bucking

and delimbing;

b) chain-saws with an engine of ≥ 80 cm are normally used for felling and bucking.

Delimbing will cause the chain-saw to run at racing speed; therefore, racing is included only for chain-

saws with a < 80 cm engine.

For brush-cutters, grass-trimmers, edgers, hedge-trimmers and pole-mounted powered pruners, the

cutting mode (full load) is estimated to be valid only for short periods, while racing and idling are the

two dominant modes. Moreover, it has also been found to be diverse and not able to be performed under

repeatable conditions.

For grass-trimmers, the full load and the racing modes are integrated in one single mode due to the

loading effect of the flexible line.

For brush-cutters, edgers, hedge-trimmers and pole-mounted powered pruners, it is not possible to

simulate the full load mode in a feasible way since there are no constant load conditions comparable

to chain-saws. Since the operating mode “racing” is anyhow the worst case, it is used as representative.

For garden blowers and knapsack mist blowers, full load and idling are the two dominant modes.

In either case, transport and other tasks between operations will cause the machine to run at idling.

Experience has led to the conclusion that, except for hedge-trimmers and blowers/knapsack mist

blowers, equal duration for the different working modes is a good estimation of daily exposure.

For hedge-trimmers, experience has shown that the machine is used 1/5 at idling and 4/5 at racing,

while for garden blowers/knapsack mist blowers it is used 1/7 at idling and 6/7 at racing.

A summary of results from “round-robin” tests, carried out between 2007 and 2008 in up to eight test

laboratories on a single chain-saw, brush-cutter and grass-trimmer, is given in Annex G.

vi © ISO 2021 – All rights reserved
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SIST EN ISO 22868:2021
INTERNATIONAL STANDARD ISO 22868:2021(E)
Forestry and gardening machinery — Noise test code for
portable hand-held machines with internal combustion
engine — Engineering method (Grade 2 accuracy)

CAUTION — Some of the test procedures specified in this document involve processes which

could lead to a hazardous situation. Any person performing tests in accordance with this

document shall be appropriately trained in the type of work to be carried out.
1 Scope

This document specifies a noise test code for determining, efficiently and under standardized

conditions, the common noise emission characteristics of portable, hand-held, combustion engine

powered forest and garden machines, and specific requirements for chain-saws, brush-cutters, grass-

trimmers, edgers, pole-mounted powered pruners, hedge-trimmers and garden blowers/vacuums/

knapsack mist blowers. Noise emission characteristics include the A-weighted emission sound pressure

level at the operator position and the A-weighted sound power level.

Noise test codes as described in this document enable the manufacturer to verify the effort regarding

low noise design.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 354:2003, Acoustics — Measurement of sound absorption in a reverberation room

ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise sources

using sound pressure — Engineering methods for an essentially free field over a reflecting plane

ISO 4871:1996, Acoustics — Declaration and verification of noise emission values of machinery and

equipment
ISO 6531:2017, Machinery for forestry — Portable chain-saws — Vocabulary

ISO 7112:2018, Machinery for forestry — Portable brush-cutters and grass-trimmers — Vocabulary

ISO 7293:1997, Forestry machinery — Portable chain saws — Engine performance and fuel consumption

ISO 8893:1997, Forestry machinery — Portable brush-cutters and grass-trimmers — Engine performance

and fuel consumption
ISO 10517:2019, Powered hand-held hedge trimmers — Safety

ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission

sound pressure levels at a work station and at other specified positions in an essentially free field over a

reflecting plane with negligible environmental corrections

ISO 11680-1:2011, Machinery for forestry — Safety requirements and testing for pole-mounted powered

pruners — Part 1: Machines fitted with an integral combustion engine

ISO 11680-2:2011, Machinery for forestry — Safety requirements and testing for pole-mounted powered

pruners — Part 2: Machines for use with back-pack power source
© ISO 2021 – All rights reserved 1
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SIST EN ISO 22868:2021
ISO 22868:2021(E)

ISO 11789:1999, Powered edgers with rigid cutting means — Definitions, safety requirements and test

procedures

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

ISO 19932-1:2013, Equipment for crop protection — Knapsack sprayers — Part 1: Safety and environmental

requirements

ISO 28139:2019, Agricultural and forestry machinery — Knapsack combustion-engine-driven airblast

sprayers — Safety and environmental requirements and test methods
IEC 61672-1:2013, Electroacoustics — Sound level meters — Part 1: Specifications
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12100, ISO 6531, ISO 7112,

ISO 11789, ISO 11680-1, ISO 11680-2, ISO 10517, ISO 19932-1 and ISO 28139 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Quantities to be measured and quantities to be determined

The quantities to be measured are the time averaged sound pressure levels defined in the relevant basic

noise measurement standards (ISO 3744, ISO 11201), A-weighted and — if required — in frequency bands.

The quantities to be determined are the sound power levels and the emission sound pressure levels,

A-weighted and — if required — in frequency bands.
5 A-weighted sound power level determination

For the determination of the A-weighted sound power level, ISO 3744 shall be used, subject to the

following modifications or additions.

a) The microphone array shall be six microphone positions, in accordance with Figure 1 and the

coordinates described by Tables 1 and 2.

NOTE 1 The six microphone array is permitted because experimental data have shown that use of this

array does not yield results that differ significantly from those obtained with the 10 microphone array

specified in ISO 3744.

b) The measurement surface shall be a hemisphere with a radius, r, of ≥ 2 d , preferably 4 m; d is

O O

determined by the reference box and its defined location above ground, see Figure 1. If a bigger

radius is needed it shall be chosen from 6 m, 8 m and 10 m. A smaller radius is permitted if it is

demonstrated that the results are within 0,5 dB compared with measurements with a hemisphere

of r = 4 m.

NOTE 2 The smaller radius can be necessary in an anechoic room where a radius of 4 m cannot be

provided.

c) The conditions for the particular type of machine to be tested and its mounting and orientation

shall be according to the corresponding annex of this document.

d) Environmental conditions shall be within the limits specified by the manufacturer of the measuring

equipment. The ambient air temperature shall be in the range −10 °C to 30 °C and the wind speed

shall be less than 5 m/s. A microphone windscreen shall be used for all outdoor testing, and for

indoor testing whenever the speed of ventilation air over the microphone exceeds 1 m/s.

2 © ISO 2021 – All rights reserved
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SIST EN ISO 22868:2021
ISO 22868:2021(E)

e) Measurements shall be made using an integrating averaging sound level meter as defined in

IEC 61672
...