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SLOVENSKI STANDARD
01-februar-2023
Akustika - Opredelitev virov zvoka in vibracij, ki jih prenaša konstrukcija -
Posredno merjenje blokiranih sil (ISO 20270:2019)
Acoustics - Characterization of sources of structure-borne sound and vibration - Indirect
measurement of blocked forces (ISO 20270:2019)
Akustik - Charakterisierung von Körperschall- und Schwingungsquellen - Indirekte
Messung von blockierten Kräften (ISO 20270:2019)
Acoustique - Caractérisation des sources de bruit solidien et de vibrations - Mesurage
indirect des forces bloquées (ISO 20270:2019)
Ta slovenski standard je istoveten z: EN ISO 20270:2022
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 20270
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2022
EUROPÄISCHE NORM
ICS 17.140.20
English Version
Acoustics - Characterization of sources of structure-borne
sound and vibration - Indirect measurement of blocked
forces (ISO 20270:2019)
Acoustique - Caractérisation des sources de bruit Akustik - Charakterisierung von Körperschall- und
solidien et de vibrations - Mesurage indirect des forces Schwingungsquellen - Indirekte Messung von
bloquées (ISO 20270:2019) blockierten Kräften (ISO 20270:2019)
This European Standard was approved by CEN on 23 October 2022.
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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20270:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Endorsement notice . 3
European foreword
The text of ISO 20270:2019 has been prepared by Technical Committee ISO/TC 43 "Acoustics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 20270:2022 by
Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2023, and conflicting national standards shall be
withdrawn at the latest by April 2023.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 20270:2019 has been approved by CEN as EN ISO 20270:2022 without any modification.
INTERNATIONAL ISO
STANDARD 20270
First edition
2019-11
Acoustics — Characterization of
sources of structure-borne sound and
vibration — Indirect measurement of
blocked forces
Acoustique — Caractérisation des sources de bruit solidien et de
vibrations — Mesurage indirect des forces bloquées
Reference number
ISO 20270:2019(E)
©
ISO 2019
ISO 20270:2019(E)
© ISO 2019
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.
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Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 20270:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Selection of degrees of freedom (DOFs) . 6
4.1 General . 6
4.2 Source receiver interface . 7
4.3 Contact DOFs. 7
4.4 Indicator DOFs . 8
4.4.1 General. 8
4.4.2 All indicator DOFs at contact area . 8
4.4.3 No indicator DOF at contact area . 8
4.4.4 Some indicator DOFs at contact area . 8
4.5 Validation DOFs . 8
5 Test arrangement . 8
5.1 General . 8
5.2 Representativeness of the receiver . 8
5.3 Design of test receiver . 9
5.4 Avoidance of secondary noise sources . 9
6 Measuring equipment .10
6.1 General .10
6.2 Multi-channel analyser .10
6.3 Vibration sensors .10
6.4 Means of excitation .10
7 Test procedure .10
7.1 General .10
7.2 Operational test .12
7.3 Frequency response function (FRF) test .12
7.3.1 General.12
7.3.2 Direct FRF measurement .12
7.3.3 Reciprocal FRF measurement.12
7.4 Preliminary test with artificial excitation .13
8 Analysis procedure .13
9 Uncertainties and validation .14
9.1 General .14
9.2 On-board validation .15
9.3 Preliminary validation using artificial excitation .15
10 Test report .15
Annex A (informative) Example of a test report: Electric rear axle drive in a passenger car;
transfer path analysis (TPA) and estimation of blocked forces in situ according to
ISO 20270:2019 .17
Annex B (informative) Tests for validity of measurement data .24
Annex C (informative) Case studies .
...