FprEN ISO 5349-3

SLOVENSKI STANDARD
oSIST prEN ISO 5349-3:2025
01-februar-2025
Mehanske vibracije - Merjenje in vrednotenje izpostavljenosti ljudi pri prenosu
vibracij na roke - 3. del: Izolirani in ponavljajoči se udarci s frekvenčnim območjem
ISO 5349-1 (ISO/DIS 5349-3:2024)
Mechanical vibration - Measurement and evaluation of human exposure to hand-
transmitted vibration - Part 3: Isolated and repeated shocks using the frequency range of
ISO 5349-1 (ISO/DIS 5349-3:2024)
Mechanische Schwingungen - Messung und Bewertung der Einwirkung von
Schwingungen auf das Hand-Arm-System des Menschen - Teil 3: Isolierte und
wiederholte Stöße im Frequenzbereich der ISO 5349-1 (ISO/DIS 5349-3:2024)
Vibrations mécaniques - Mesurage et évaluation de l’exposition des individus aux
vibrations transmises à la main - Partie 3: Évaluation de chocs isolés ou répétés en
utilisant la gamme de fréquences couverte par l’ISO 5349-1 (ISO/DIS 5349-3:2024)
Ta slovenski standard je istoveten z: prEN ISO 5349-3
ICS:
13.160 Vpliv vibracij in udarcev na Vibration and shock with
ljudi respect to human beings
oSIST prEN ISO 5349-3:2025 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 5349-3:2025
oSIST prEN ISO 5349-3:2025
DRAFT
International
Standard
ISO/DIS 5349-3
ISO/TC 108/SC 4
Mechanical vibration —
Secretariat: DIN
Measurement and evaluation
Voting begins on:
of human exposure to hand-
2024-12-10
transmitted vibration —
Voting terminates on:
2025-03-04
Part 3:
Isolated and repeated shocks using
the frequency range of ISO 5349-1
ICS: 13.160
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
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This document is circulated as received from the committee secretariat.
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Reference number
ISO/DIS 5349-3:2024(en)
oSIST prEN ISO 5349-3:2025
DRAFT
ISO/DIS 5349-3:2024(en)
International
Standard
ISO/DIS 5349-3
ISO/TC 108/SC 4
Mechanical vibration —
Secretariat: DIN
Measurement and evaluation
Voting begins on:
of human exposure to hand-
transmitted vibration —
Voting terminates on:
Part 3:
Isolated and repeated shocks using
the frequency range of ISO 5349-1
ICS: 13.160
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 5349-3:2024(en)
ii
oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms. 2
5 Hand-transmitted shock. 4
6 Measurement and evaluation . 4
6.1 Evaluation of continuous hand-transmitted vibration .4
6.2 Frequency range and frequency weightings . .4
6.3 Evaluation of HTS .5
6.4 Measuring HTS .6
6.4.1 General .6
6.4.2 Location and orientation of transducers .6
6.4.3 Determining the instantaneous total values .6
6.4.4 Transducer coupling .7
6.4.5 Sampling .8
6.4.6 Measurement period .8
7 Application of HTS evaluations . 8
7.1 Emission information .8
7.2 Health effects .8
8 Test report . 9
Annex A (informative) Isolated and continuous hand-transmitted shock .10
Annex B (informative) Examples of VPM, p measured on common machine types .15
F
Annex C (informative) Supplementary measurement parameters .16
Bibliography .20

iii
oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 108, Mechanical vibration, shock and condition
monitoring, Subcommittee SC 4, Human exposure to mechanical vibration and shock.
A list of all parts in the ISO 5349 series can be found on the ISO website.
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
oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
Introduction
The risk estimation for hand-arm vibration injury is based on ISO 5349-1. The scope of the 2001 revision
of that ISO Standard notes that “the time dependency for human response to repeated shocks is not fully
known” and the application of ISO 5349-1 to such vibration is to be “made with caution”.
Despite the lack of knowledge in this field, it is desirable to standardise methods for evaluating hand-
transmitted shock (HTS) vibrations from hand-held and hand-guided machinery, and specifically provide a
metric suitable for evaluating the peak amplitude of acceleration signals. This document gives guidance for
evaluating HTS in the frequency range covered by ISO 5349-1.
NOTE European Regulations relating to machinery safety require (from 2027) manufacturers or suppliers to
provide values for the “mean of the peak amplitude of the acceleration” from repeated HTS.
The objective for this document is to:
— enhance research on health effects from HTS;
— provide machine manufactures and user a method for evaluating hand-transmitted shock;
— encourage and enable:
— machine producers to reduce hand-transmitted shock;
— the development of mitigation measures on existing tools;
— the reduction of hand-transmitted isolated and repeated shock vibration exposures in the workplace.
The use of this document will contribute to the gathering of consistent HTS data to improve occupational
safety. There is currently no clear evidence that HTS produces specific health effects beyond those associated
with hand-transmitted vibration or presents a risk of developing other musculoskeletal injuries to the hand
and arm such as repetitive strain injury and carpel tunnel syndrome. The systematic measurement and
reporting of parameters relating to HTS may provide evidence of associations with individual health effects.
This document specifies the general requirements for the measurement and evaluation of human exposure
to HTS. It builds on the requirements of ISO 5349-1 and measurement guidance in ISO 5349-2. It uses
instrumentation that conforms to the requirements of ISO 8041-1. The current version ISO 8041-1:2017 does
not require measurement of the peak value of acceleration for hand-transmitted vibration, however, the
instrumentation conforming to ISO 8041-1:2017, should provide some confidence in measurements of the
metrics defined here.
This document is based on measurements in the frequency range covered by ISO 5349-1 (nominally 6,3 Hz
to 1 250 Hz). An additional Technical Specification is being prepared that enables both hand-transmitted
vibration (HTV) and HTS evaluations to include vibration frequencies much higher than the 1 250 Hz limit
of ISO 5349-1.
v
oSIST prEN ISO 5349-3:2025
oSIST prEN ISO 5349-3:2025
DRAFT International Standard ISO/DIS 5349-3:2024(en)
Mechanical vibration — Measurement and evaluation of
human exposure to hand-transmitted vibration —
Part 3:
Isolated and repeated shocks using the frequency range of
ISO 5349-1
1 Scope
This document gives information and guidance on the evaluation and assessment of hand-transmitted
shock. For the purposes of this document, hand-transmitted shock is any impactive or impulsive vibration
that the machine or tool produces as a sequence of single events (isolated shocks) linked by periods of no, or
lower vibration.
This document defines parameters for the evaluation of machinery emissions of hand-transmitted shocks in
the frequency range covered by ISO 5349-1 (nominally 6,3 Hz to 1 250 Hz).
NOTE It is recognised that shock vibration often includes substantial levels of high-frequency vibration
energy. The measured peak values of hand-transmitted shock are likely to be higher if the upper frequency limit is
increased. High-frequency shocks, composed of vibrations at frequencies greater than 1 250 Hz, are dealt with in
ISO/PWI TS 5349-4.
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 2041, Mechanical vibration, shock and condition monitoring — Vocabulary
ISO 5349-1:2001, Mechanical vibration — Measurement and evaluation of human exposure to hand-transmitted
vibration — Part 1: General requirements
ISO 5349-2, Mechanical vibration — Measurement and evaluation of human exposure to hand-transmitted
vibration — Part 2: Practical guidance for measurement at the workplace
ISO 8041-1:2017, Human response to vibration — Measuring instrumentation — Part 1: General purpose
vibration meters
ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM:1995)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5349-1, ISO 5349-2, ISO 8141-1,
ISO 2041 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/

oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
3.1
shock
sudden change of force, position, velocity or acceleration occurring in a time less than, or similar to, that
corresponding to the natural frequency of a component of a machine or biological system and excites
disturbances in that component
3.2
shock vibration
vibration caused by events that generate shocks
3.3
isolated shock
single shock vibration or isolated shock hand-transmitted vibrations clearly separated in time
3.4
repeated shock
sequences of hand-transmitted shock vibrations linked by periods of no, or low vibration level
Note 1 to entry: The sequences of repeated shock may be at regular or irregular intervals.
3.5
continuous shock vibration
continuous sequences of hand-transmitted shock vibration linked by periods where the vibration level does
not decay significantly between individual shocks
3.6
W frequency weighting
h
W frequency weighting as specified in ISO 8041-1
h
3.7
flat frequency weighting
h
band-limiting component of the W frequency weighting as specified in ISO 8041-1
h
3.8
vibration peak magnitude
VPM
a value representing the mean value of the peak amplitude of the acceleration
4 Symbols and abbreviated terms
HTS hand-transmitted shock vibration
a flat acceleration
F h
Acceleration which is frequency weighted using the flat frequency weight-
h
ing.
a peak value or peak amplitude of flat frequency weighted triaxial accelera-
F, peak h
tion
For any specified time interval 0≤≤tT , the peak value of a (t) is the
m F
maximum absolute instantaneous value, as given by:
aa= max(()t )
F, peak Fv
0≤≤tT
NOTE 1 This quantity is used to describe the maximum amplitude of
the flat band-limited triaxial acceleration.
h
oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
at() instantaneous flat acceleration total value
Fv h
The instantaneous triaxial acceleration total value of the flat frequency
h
weighted vibration (m/s ) is given by:
22 2 2
at()=+at() at()+at()
()
FFvx FFyz
a time-averaged flat acceleration
Fv h
Root-mean-square (RMS) of the flat triaxial vibration total value, in metres
h
per second squared (m/s ), as given by:
T 2
 
 
a = at()dt
FFvv
∫
T 
 0 
at() , at() , at() instantaneous single-axis acceleration value of the flat frequency weighted
Fx Fy Fz h
vibration in the axes denoted as x, y and z (m/s )
f frequency (Hz)
p vibration peak magnitude (VPM) of the flat acceleration
F h
th th
Square root ratio of 6 power acceleration sum to 4 power acceleration sum
(m/s ), see Annex A
T 2
 
at()dt
Fv
 
∫
p =
F  
T
 
at()dt
Fv
∫
 
NOTE 2 For digital processing, this may also be expressed as
N
a
∑ Fvi
i=1
p =
F
N
a
∑ Fvi
i=1
where i is the sample number and N is the total number of samples.
NOTE 3 p is based on a broader definition for VPM, p that will be de-
F F
fined in project ISO/PWI TS 5349-4 (Technical Specification currently being
developed).
R repetition rate
-1
Number of shocks per second (s )
NOTE 4 The repetition rate applies to periodically repeated shocks.
-1
NOTE 5 The unit s is identical to the unit Hz. In this document the
-1
unit s is used for the single value representing the repetition rate, while Hz
is used to refer to the frequency characteristics of the full acceleration signal.
mean repetition rate
R
-1
The mean (average) repetition rate (s ) is given by:
N−1
R=
TT−
N 1
where N is the number of shock events and T -T the time in seconds between
N 1
th
the first event at time T and the N event at time T .
1 N
NOTE 6 The mean repetition rate applies to repeated shocks with var-
ying time intervals between shocks.
T measurement duration or measurement period (s)
m
T shock period or repetition time
rep
Time between one shock event and the next (s)

oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
5 Hand-transmitted shock
Hand-held power tools, hand-guided machinery, hand-fed machinery and manual tools can expose the user
to hand-transmitted shock vibrations (HTS). It can be useful to distinguish between isolated and continuous
HTS, see Annex A.
Tools such as nail guns, produce isolated shocks on an irregular basis, controlled by the machine operator.
Road breakers produce shocks repetitively, controlled by the machine and operations such as grinding can
produce continuous shock vibration.
At higher repetition rates, individual elements of a machine operation will cause the shock vibrations, such
as individual saw teeth biting into a cut. At these high rates the shocks will be perceived as continuous
vibration.
6 Measurement and evaluation
6.1 Evaluation of continuous hand-transmitted vibration
Any evaluation of HTS should include evaluation of continuous hand-transmitted vibration, in accordance
with ISO 5349-1 and the measurement guidance in ISO 5349-2.
6.2 Frequency range and frequency weightings
All HTS measurements in this document use the flat frequency weighting, which is the band-limiting
h
component of the W frequency weighting defined in ISO 5349-1 and ISO 8041-1, see Figure 1. The flat
h h
frequency weighting includes the vibration frequency range from the bottom of the 8 Hz octave-band to the
top of the 1 000 Hz octave band.
NOTE A Technical Specification on high-frequency hand-transmitted vibration is under development
ISO/PWI TS 5349-4. The frequency range of this proposed Technical Specification will include evaluation to higher
frequencies than those covered by the flat frequency weighting.
h
The flat frequency weighting shall meet the specification for W frequency weighting given in ISO 8041-1.
h h
However, the tolerances specified in ISO 8041-1:2017, 5.6.6, for the W band limiting are not appropriate for
h
the measurement of HTS. Therefore, in this document the W band-limiting filter tolerances are modified at
h
high frequencies. The tolerances shall be as in ISO 8041-1:2017, Table 4, but the transition point f shall be
t4
(34/10)
modified to be 10 , (2 511,89 Hz). All the tolerance transition points for the flat frequency weighting
h
are tabulated in Table 1 and illustrated in Figure 2.
Table 1 — Flat frequency weightings tolerance transitions points
h
Frequency range Frequency range (nomi- Magnitude tolerance Phase tolerance
(exact) nal)
Hz Hz
()
f ≤10 f ≤39, 8
+26 %, −100 % ±∞
6 10
() ()
10 10
10 < +26 %, −21 % ±12°
10 29
() ()
10 10
10 ≤≤f 10 10,,00≤≤f 794 33
+12 %, −11 % ±6°
29 34
() ()
10 10
10 < ()
10 ≤ f 2 511,89 ≤ f
+26 %, −100 % ±∞
NOTE These modified tolerances may be superseded by future revisions of ISO 8041-1.

oSIST prEN ISO 5349-3:2025
ISO/DIS 5349-3:2024(en)
Key
X frequency in Hz
Y weighting factor
flat
h
tolerance of flat
h
W
h
Figure 1 — W and flat frequency weightings (from ISO 5349-1 and ISO 8041-1) and tolerances for
h h
flat weighting when used for VPM
h
6.3 Evaluation of HTS
The following parameters shall be evaluated for the combination of the three axes, x, y and z:
— The vibration peak magnitude (VPM) of the flat acceleration, p .
h F
— Measurement time, T .
m
The measurement uncertainty shall be assessed in accordance with ISO/IEC Guide 98-3 (GUM) (see also
[3]
ISO/TS 22704 ).
NOTE 1 In some cases, single events causing very high vibration peaks have been shown to have a significant
impact on the measured p value and will af
...