IEC 62127-3:2022

IEC 62127-3 ®
Edition 2.0 2022-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Ultrasonics – Hydrophones –
Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz

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IEC 62127-3 ®
Edition 2.0 2022-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Ultrasonics – Hydrophones –
Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.50 ISBN 978-2-8322-6313-6
– 2 – IEC 62127-3:2022 RLV © IEC 2022
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and symbols. 7
4 List of symbols . 11
5 Hydrophone characteristics . 12
5.1 General . 12
5.2 Basic information . 12
5.3 Sensitivity . 12
5.4 Frequency response . 13
5.4.1 Stated frequency band . 13
5.4.2 Frequency dependence . 13
5.5 Directional response . 14
5.5.1 General . 14
5.5.2 Determination of the directional response . 14
5.5.3 Symmetry of directional response . 15
5.6 Effective radius .
5.6 Effective hydrophone size . 16
5.6.1 General . 16
5.6.2 Model of directional response . 16
5.6.3 Fitting of experimental response to theoretical predictions . 17
5.7 Dynamic range, linearity and electromagnetic interference . 18
5.8 Electric output characteristics . 18
5.8.1 Hydrophone without pre-amplifier . 18
5.8.2 Hydrophone assembly . 19
5.8.3 Output lead configuration . 19
5.9 Environmental aspects . 20
5.9.1 Temperature range . 20
5.9.2 Water tightness . 20
5.9.3 Water properties and incompatible materials . 20
5.9.4 Exposed material . 20
5.10 Guidance manual . 20
5.11 List of hydrophone characteristics . 20
Annex A (informative) Examples of information on hydrophone properties . 21
A.1 General . 21
A.2 Basic information . 21
A.3 Sensitivity and frequency response . 21
A.4 Directional response . 24
A.5 Effective radius dimension . 26
A.6 Dynamic range, linearity and electromagnetic interference . 28
A.6.1 Lower dynamic limit . 28
A.6.2 Upper dynamic limit . 28
A.7 Electric output characteristics . 28
A.8 Environmental aspects . 28
Annex B (informative) Rationale . 30

B.1 General . 30
B.2 Changes to the determination of directional response . 30
B.3 Changes to the determination of effective radius . 30
Annex C (informative) Membrane hydrophone directivity model . 32
C.1 General . 32
C.2 Details of model . 32
Bibliography . 33

Figure A.1 – Frequency response of 0,2 mm needle hydrophone .
Figure A.1 – Frequency response of 0,2 mm needle hydrophone in the range 1 MHz to
40 MHz . 23
Figure A.2 – Frequency response of 0,2 mm needle hydrophone in the range 100 kHz
to 1 MHz . 23
Figure A.3 – Directional response of 0,2 mm needle hydrophone . 26
Figure A.4 – Effective radius of 0,2 mm needle hydrophone . 27
Figure A.5 – Comparison of modelled and experimentally derived directional response . 27

Table A.1 – Example of basic information for 0,2 mm needle hydrophone assembly . 21

– 4 – IEC 62127-3:2022 RLV © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ULTRASONICS – HYDROPHONES –
Part 3: Properties of hydrophones for ultrasonic fields up to 40 MHz

FOREWORD
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This redline version of the official IEC Standard allows the user to identify the changes made to
the previous edition IEC 62127-3:2007+AMD1:2013 CSV. A vertical bar appears in the margin
wherever a change has been made. Additions are in green text, deletions are in strikethrough
red text.
IEC 62127-3 has been prepared by IEC technical committee 87: Ultrasonics. It is an
International Standard.
This second edition cancels and replaces the first edition published in 2007 and
Amendment 1:2013. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition.
a) The upper frequency limit of 40 MHz has been removed.
b) Hydrophone
...