NBN EN 62092 : 2002

INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 List of symbols
5 Hydrophone characteristics
  5.1 General
  5.2 Basic information
  5.3 Hydrophone class
  5.4 Sensitivity
  5.5 Frequency response
  5.6 Directional response
  5.7 Effective radius
  5.8 Dynamic range and linearity
  5.9 Electric output characteristics
       5.9.1 Electric output characteristics
       5.9.2 Output lead configuration and ringing
              resonance in cable
  5.10 Information on the integral amplifier, if included
  5.11 Environmental and other aspects
       5.11.1 Temperature range
       5.11.2 Water tightness
       5.11.3 Water properties and incompatible materials
       5.11.4 Other aspects
6 Relative measurements of hydrophone characteristics
  6.1 General concepts
       6.1.1 Relative measurement for directional response
              and for comparison of sensitivity
       6.1.2 Temporal waveform and frequency concepts and
              hydrophone position
  6.2 Measurement concepts
       6.2.1 Source transducer
       6.2.2 Types of measurement
       6.2.3 Temporal waveform concepts
       6.2.4 Hydrophone position concepts
  6.3 Requirements
       6.3.1 Measurement vessel and water
       6.3.2 Temperature stability
       6.3.3 Positional accuracy
       6.3.4 Maximum hydrophone size
       6.3.5 Requirements for the electronic equipment
       6.3.6 Requirements with particular respect to time
              delay spectrometry
7 Hydrophone calibration
Annex A (informative) Tables
Annex B (informative) Behaviour of PVDF polymer sensors in
                       high intensity
Annex C (informative) Hydrophone positioning in the
                       ultrasonic near field
Annex D (informative) Time delay spectrometry - Requirements
                       and a brief review of the technique
Annex E (informative) The absolute calibration of
                       hydrophones up to 40 MHz
Annex ZA (normative) Normative references to international
                       publications with their corresponding
                       European publications
Bibliography

Applicable to - hydrophones employing piezoelectric sensor elements, designed to measure the pulsed and continuous-wave ultrasonic fields generated by ultrasonic equipment; - hydrophones used for measurements made in water and in the frequency range between 15 MHz and 40 MHz; - hydrophones with or without an integral amplifier; - hydrophones with a circular piezoelectrically active elements. Specifies - relevant hydrophone characteristics; - methods of determining directional response and hydrophone sensitivity based on relative or comparative measurements; and describes - absolute hydrophone calibration methods. Covers recommendations and references to accepted literature are made for the various relative and absolute calibration methods in the frequency range.