IEC TS 62600-40:2019

IEC TS 62600-40 ®
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –
Part 40: Acoustic characterization of marine energy converters

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IEC TS 62600-40 ®
Edition 1.0 2019-06
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –

Part 40: Acoustic characterization of marine energy converters

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.140 ISBN 978-2-8322-6926-8

– 2 – IEC TS 62600-40:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Symbols and abbreviated terms . 11
5 Outline of method . 11
6 Instrumentation . 12
6.1 Sound measurement system . 12
6.1.1 General . 12
6.1.2 Frequency range . 13
6.1.3 Sensitivity and dynamic range . 13
6.1.4 Hydrophone directionality . 13
6.1.5 Data acquisition and playback system . 13
6.1.6 Calibration . 13
6.2 Deployment platforms for sound measurement systems . 14
6.2.1 Fixed platforms . 14
6.2.2 Drifting platforms . 14
6.2.3 Flow-noise and self-noise minimization . 16
6.3 Contextual measurements . 16
6.3.1 General . 16
6.3.2 Winds . 16
6.3.3 Waves . 17
6.3.4 Currents . 17
6.3.5 Sound speed profiles . 18
6.3.6 Marine energy converter output . 18
7 Measurements and measurement procedures . 19
7.1 Metocean conditions . 19
7.1.1 General . 19
7.1.2 Winds . 19
7.1.3 Waves . 19
7.1.4 Currents . 19
7.2 Potential sources of acoustic masking . 19
7.2.1 General . 19
7.2.2 Vessel noise . 20
7.2.3 Biological noise sources . 20
7.2.4 Precipitation . 20
7.2.5 Air traffic . 20
7.2.6 Physical sources. 20
7.3 Underwater sound from marine energy converters . 20
7.3.1 Levels of characterization . 20
7.3.2 Measurement frequency range. 20
7.4 Wave energy converters . 21
7.4.1 WEC characteristics . 21
7.4.2 Sound measurement system deployment . 22
7.4.3 Temporal resolution . 22

7.4.4 Spatial resolution . 22
7.4.5 Sound speed profiles . 23
7.5 Current energy converters . 23
7.5.1 CEC characteristics . 23
7.5.2 Sound measurement system deployment . 23
7.5.3 Temporal resolution . 24
7.5.4 Spatial resolution . 24
7.5.5 Sound speed profiles . 25
7.6 Ocean thermal energy converters . 25
7.6.1 Overview . 25
7.6.2 Sound measurement system deployment . 26
7.6.3 Temporal resolution . 26
7.6.4 Spatial resolution . 26
7.6.5 Sound speed profiles . 27
8 Data analysis procedures . 27
8.1 General . 27
8.2 Metocean conditions . 27
8.2.1 Winds . 27
8.2.2 Waves . 28
8.2.3 Currents . 28
8.3 Sound speed profiles . 28
8.4 Marine energy converter output. 28
8.4.1 General . 28
8.4.2 Wave energy converters . 28
8.4.3 Current energy converters . 28
8.4.4 Ocean thermal energy converters . 28
8.5 Underwater sound . 29
8.5.1 General . 29
8.5.2 Acoustic signal processing. 29
8.5.3 Geo-referencing of drifting acoustic measurements . 30
8.5.4 Global sample acceptance criteria . 30
8.5.5 Considerations specific to wave energy converters . 31
8.5.6 Considerations specific to current energy converters . 32
8.5.7 Considerations specific to ocean thermal energy converters . 32
8.5.8 Aggregate statistics . 33
9 Information to be reported . 33
9.1 Sound measurement system . 33
9.2 Marine energy conversion system . 34
9.3 Measurement site . 34
9.4 Contextual measurements . 34
9.5 Specific reporting for wave energy converters . 35
9.5.1 Level A . 35
9.5.2 Level B . 37
9.6 Specific reporting for current energy converters . 37
9.6.1 Level A . 37
9.6.2 Level B . 37
9.7 Specific reporting for ocean thermal energy converters . 37
9.7.1 Level A . 37
9.7.2 Level B . 38

– 4 – IEC TS 62600-40:2019 © IEC 2019
Annex A (informative)  Sound within and a
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