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IEC 60068-2-65:2013

(Main)

Environmental testing - Part 2-65: Tests - Test Fg: Vibration - Acoustically induced method

Environmental testing - Part 2-65: Tests - Test Fg: Vibration - Acoustically induced method

IEC 60068-2-65:2013 provides standard procedures and guidance for conducting acoustic tests in order to determine the ability of a specimen to withstand vibration caused by a specified sound-pressure level environment to which it is, or is liable to be, subjected. This second edition cancels and replaces the second edition, published in 1993, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- minor technical and editorial changes were made throughout the document as originally requested by the DE National Committee;
- following comments at the CD stage, particularly from the UK National Committee, significant technical and editorial additions were made to the standard for acoustic testing employing the progressive wave tube technique.

Essais d'environnement - Partie 2-65: Essais - Essai Fg: Vibrations - Méthode induite acoustiquement

La CEI 60068-2-65:2013 fournit des méthodes normalisées et un guide pour la conduite d'essais acoustiques afin de déterminer l'aptitude d'un spécimen à résister à des vibrations provoquées par un environnement de niveau de pression acoustique spécifié auquel il est, ou est susceptible d'être, exposé. Cette deuxième édition annule et remplace la deuxième édition, publiée en 1993, dont elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- des modifications techniques et rédactionnelles mineures ont été faites dans toute la norme, tel qu'il a été demandé à l'origine par le Comité national allemand;
- conformément aux commentaires émis au stade CD, en particulier ceux du Comité national britannique, des ajouts techniques et éditoriaux significatifs ont été réalisés dans la norme pour l'essai acoustique employant le technique du tube à ondes progressives.

General Information

Status
Published
Publication Date
05-Feb-2013
ICS
01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
19.040 - Environmental testing
29.020 - Electrical engineering in general
Technical Committee
TC 104 - Environmental conditions, classification and methods of test
Drafting Committee
MT 17 - TC 104/MT 17
Current Stage
PPUB - Publication issued
Start Date
15-Mar-2013
Completion Date
06-Feb-2013
Ref Project

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IEC 60068-2-65:2013 - Environmental testing - Part 2-65: Tests - Test Fg: Vibration - Acoustically induced methodIEC 60068-2-65:2013 - Environmental testing - Part 2-65: Tests - Test Fg: Vibration - Acoustically induced method
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IEC 60068-2-65:2013 - Environmental testing - Part 2-65: Tests - Test Fg: Vibration - Acoustically induced method
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IEC 60068-2-65 ®
Edition 2.0 2013-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-65: Tests – Test Fg: Vibration – Acoustically induced method

Essais d’environnement –
Partie 2-65: Essais – Essai Fg: Vibrations – Méthode induite acoustiquement

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IEC 60068-2-65 ®
Edition 2.0 2013-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-65: Tests – Test Fg: Vibration – Acoustically induced method

Essais d’environnement –
Partie 2-65: Essais – Essai Fg: Vibrations – Méthode induite acoustiquement

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 19.040; 29.020 ISBN 978-2-83220-641-6

– 2 – 60068-2-65 © IEC:2013
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviations. 7
3.1 Terms and definitions . 7
3.2 Symbols and abbreviations . 11
4 Acoustic environments and requirements for testing . 11
4.1 Acoustic environment for testing . 11
4.1.1 General . 11
4.1.2 Reverberant field . 13
4.1.3 Progressive wave field . 14
4.1.4 Cavity resonance . 14
4.1.5 Standing wave . 14
4.2 Sound sources . 14
4.3 Measuring apparatus . 14
4.3.1 General . 14
4.3.2 Acoustic measurements . 14
4.3.3 Vibration response measurements . 15
4.3.4 Analysis of results . 15
4.4 Requirements for testing . 15
4.4.1 Type of facility . 15
4.4.2 Mounting . 15
4.4.3 Specimen instrumentation . 16
4.4.4 Preparation of test control . 17
5 Recommended severities . 18
6 Preconditioning . 18
7 Initial measurements . 19
8 Testing . 19
8.1 Normal testing . 19
8.2 Accelerated testing . 19
9 Intermediate measurements . 19
10 Recovery . 19
11 Final measurements . 19
12 Information to be given in the relevant specification . 20
13 Information to be given in the test report . 20
Annex A (informative) Guidance for the test requirements. 22
Bibliography . 30

Figure 1 – Third-octave band spectrum for aeronautical applications . 12
Figure 2 – Octave band spectra for fans derived from [4] . 13
Figure 3 – Octave band spectrum for noisy industrial machinery derived from [4] . 13
Figure 4 – Typical locations of microphone checkpoints (1 – 6) on a fictitious surface
around a specimen . 17

60068-2-65 © IEC:2013 – 3 –
Figure A.1 – Typical microphone arrangement around a specimen in a reverberation
chamber. 22
Figure A.2 – Typical microphone checkpoint arrangement around a long cylindrical
specimen . 25

Table 1 – Tolerances for acoustic measurement . 14
Table 2 – Overall sound pressure level and duration of exposure . 18
Table A.1 – Octave band/room volume relationship . 23
Table A.2 – Reverberation room, ratios of dimensions . 23
Table A.3 – Examples of sound sources with waveforms and typical power outputs. 28
Table A.4 – Typical OASPL and exposure durations . 28

– 4 – 60068-2-65 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-65: Tests –
Test Fg: Vibration –
Acoustically induced method
FOREWORD
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