IEC 60268-4:2014
(Main)Sound system equipment - Part 4: Microphones
Sound system equipment - Part 4: Microphones
IEC 60268-4:2014 specifies methods of measurement for the electrical impedance, sensitivity, directional response pattern, dynamic range and external influences of sound system microphones, and also details the characteristics to be specified by the manufacturer. This fifth edition cancels and replaces the fourth edition published in 2010, and constitutes a technical revision. It includes the following changes:
- clarification of Table 5 of classification of characteristics;
- clarification of graphical representation;
- clarification of environmental influences;
- rewritten clause for EMC;
- tolerances and more specific values for noise measurements;
- inclusion of near-field response for sound source-to-microphone distances of the order of 30 cm.
Equipements pour systèmes électroacoustiques - Partie 4: Microphones
L'IEC 60268-4 :2014 spécifie les méthodes de mesure portant sur l'impédance électrique, l'efficacité, le diagramme de directivité, la dynamique, et les perturbations extérieures des microphones pour les systèmes électroacoustiques, et détaille également les caractéristiques à spécifier par le constructeur. Cette cinquième édition annule et remplace la quatrième édition parue en 2010. Elle constitue une révision technique. Cette édition inclut les modifications suivantes:
- clarification du Tableau 5 de classification des caractéristiques;
- clarification de la représentation graphique;
- clarification des influences de l'environnement;
- réécriture de l'article relatif à la CEM;
- tolérances et valeurs plus spécifiques pour les mesures de bruit;
- inclusion de la réponse en champ proche pour des distances source sonore-microphone de l'ordre de 30 cm.
Electromagnetic compatibility (EMC) - Part 2: Environment – Section 5: Classification of electromagnetic environments - Basic EMC publication
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IEC 60268-4
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Sound system equipment –
Part 4: Microphones
Équipements pour systèmes électroacoustiques –
Partie 4: Microphones
IEC 60268-4:2014-06(en-fr)
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SLOVENSKI SIST-TP IEC/TR2 61000-2-
5:2004
STANDARD
april 2004
Electromagnetic compatibility (EMC) - Part 2: Environment – Section 5:
Classification of electromagnetic environments - Basic EMC publication
ICS 33.100.01 Referenčna številka
SIST-TP IEC/TR2 61000-2-5:2004(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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1000-2-5 IEC:1995 − 3 −
CONTENTS
Page
FOREWORD . 7
Clause
1 General . 11
1.1 Scope and object. 11
1.2 Normative reference. 11
1.3 Approach. 11
2 Definitions . 15
2.1 Annotated definitions on electromagnetic compatibility. 17
2.2 Acronyms. 19
3 User's guide for this report. 19
3.1 Rationale for classification system . 19
3.2 Environmental phenomena. 19
3.3 Simplification of the environmental database. 21
4 Low-frequency electromagnetic phenomena . 25
4.1 Conducted low-frequency phenomena. 25
4.2 Radiated low-frequency phenomena. 33
5 High-frequency electromagnetic phenomena . 37
5.1 Conducted high-frequency phenomena . 37
5.2 Radiated high-frequency phenomena . 45
6 Electrostatic discharge. 49
6.1 ESD currents. 49
6.2 Fields produced by ESD currents. 51
7 Classification of environments .53
7.1 Types of location . 53
7.2 Impinging disturbances and equipment ports . 53
8 Principles of the selection of immunity levels. 57
8.1 Approach. 57
8.2 Uncertainties. 57
8.3 Criticality criteria. 59
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1000-2-5 IEC:1995 − 5 −
Tables Page
1 Principal phenomena causing electromagnetic disturbances. 23
2 Range of disturbance degrees for harmonics in low-voltage power systems. 27
3 Range of disturbance degrees for signalling voltages in power systems . 29
4 Sources and range of disturbance degrees for voltage amplitude and frequency
in power systems . 31
5 Sources and range of disturbance degrees for low-frequency, common-mode
induced voltages in signal and control cables.
...
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