EN IEC 60565-2:2019

SLOVENSKI STANDARD
01-januar-2020
Podvodna akustika - Hidrofoni - Kalibracija hidrofonov - 2. del: Postopki kalibracije
z nizkimi frekvencami (IEC 60565-2:2019)
Underwater acoustics - Hydrophones - Calibration of hydrophones - Part 2: Procedures
for low frequency pressure calibration (IEC 60565-2:2019)
Wasserschall - Hydrophone - Kalibrierung von Hydrophonen - Teil 2: Verfahren für
niederfrequente Druckkalibrierung (IEC 60565-2:2019)
Acoustique sous-marine - Hydrophones - Étalonnage des hydrophones - Partie 2:
Procédures pour l’étalonnage à basse pression de fréquence (IEC 60565-2:2019)
Ta slovenski standard je istoveten z: EN IEC 60565-2:2019
ICS:
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60565-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2019
ICS 17.140.50
English Version
Underwater acoustics - Hydrophones - Calibration of
hydrophones - Part 2: Procedures for low frequency pressure
calibration
(IEC 60565-2:2019)
Acoustique sous-marine - Hydrophones - Étalonnage des Wasserschall - Hydrophone - Kalibrierung von
hydrophones - Partie 2: Procédures pour l'étalonnage à Hydrophonen - Teil 2: Verfahren für niederfrequente
basse pression de fréquence Druckkalibrierung
(IEC 60565-2:2019) (IEC 60565-2:2019)
This European Standard was approved by CENELEC on 2019-10-24. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60565-2:2019 E

European foreword
The text of document 87/720/FDIS, future edition 1 of IEC 60565-2, prepared by IEC/TC 87
"Ultrasonics" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-07-24
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-10-24
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60565-2:2019 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 60565:2006 NOTE Harmonized as EN 60565:2007 (not modified)

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-801 -  International Electrotechnical Vocabulary - - -
Chapter 801: Acoustics and
electroacoustics
IEC 60500 2017 Underwater acoustics - Hydrophones - EN 60500 2017
Properties of hydrophones in the frequency
range 1 Hz to 500 kHz
IEC 60565-2 ®
Edition 1.0 2019-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Underwater acoustics – Hydrophones – Calibration of hydrophones –

Part 2: Procedures for low frequency pressure calibration

Acoustique sous-marine – Hydrophones – Étalonnage des hydrophones –

Partie 2: Procédures pour l’étalonnage à basse pression de fréquence

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-7346-3

– 2 – IEC 60565-2:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols . 12
5 Procedures for calibration . 13
5.1 Principles . 13
5.2 Field limitations . 14
5.3 Schematic survey of procedures . 14
5.4 Reporting of results . 14
5.5 Recalibration periods . 15
5.6 Temperature and pressure considerations for calibration . 15
5.7 Preparation of transducers . 15
6 Electrical measurements. 15
6.1 Signal type . 15
6.2 Earthing . 15
6.3 Measurement of hydrophone output voltage . 15
6.3.1 General . 15
6.3.2 Electrical loading by measuring instrument . 15
6.3.3 Electrical loading by extension cable . 16
6.3.4 Cross-talk and acoustic interference . 16
6.3.5 Integral pre-amplifier . 16
6.4 Measurement of projector current . 16
7 Calibration by hydrostatic excitation . 16
7.1 General . 16
7.2 Principle . 16
7.2.1 Determination of the alternating pressure . 16
7.2.2 Determination of the correction factor . 18
7.2.3 Determination of the equivalent height . 18
7.2.4 Calculation of the pressure sensitivity of hydrophone . 20
7.3 Design of vibration system . 20
7.4 Alternative method for hydrostatic excitation . 20
7.5 Uncertainty . 21
8 Calibration by piezoelectric compensation . 21
8.1 General . 21
8.2 Principle . 21
8.2.1 Determination of the sound pressure . 21
8.2.2 Determination of the characteristic constant . 22
8.2.3 Calculation of the pressure sensitivity of hydrophone . 23
8.3 Design of the calibration chamber . 23
8.3.1 General . 23
8.3.2 Low frequency chamber . 23
8.3.3 High frequency chamber . 23
8.4 Practical limitations of the piezoelectric compensation method . 24
8.5 Relative calibration method . 24

IEC 60565-2:2019 © IEC 2019 – 3 –
8.6 Uncertainty . 25
9 Calibration by acoustic coupler reciprocity . 25
9.1 General . 25
9.2 Principle . 25
9.2.1 Theory of acoustic coupler reciprocity . 25
9.2.2 Procedures for the reciprocity calibration . 26
9.2.3 Calculation of transfer impedance . 27
9.2.4 Determination of acoustic compliance . 27
9.3 Limitation of acoustic coupler reciprocity . 27
9.3.1 Frequency limit . 27
9.3.2 Hydrophone limit. 28
9.4 Measurement . 28
9.4.1 General . 28
9.4.2 Evidence of interference effects . 28
9.4.3 Reciprocity verification . 28
9.4.4 Linearity verification . 29
9.5 Uncertainty . 29
10 Calibration by pistonphone . 29
10.1 General . 29
10.2 Principle . 29
10.2.1 Determination of the sound pressure . 29
10.2.2 Determination of the compliance of the medium . 30
10.2.3 Calculation of the pressure sensitivity .
...