IEC TS 62903:2018

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General
6 Requirements of the measurement system
7 Measurement of the effective half-aperture of the
  spherically curved transducer
8 Measurements of the electroacoustical parameters
  and the acoustic output power
9 Measurement uncertainty
Annex A (informative) - Relation of the average
        amplitude reflection coefficient on a plane
        interface of water-stainless steel and the focus
        half-angle for a normally incident beam of a
        circular spherically curved transducer [1, 2]
Annex B (informative) - Diffraction correction
        coefficient G[sf] in the free-field selfreciprocity
        calibration method for circular spherically
        curved transducers in water neglecting
        attenuation [2, 3, 4]
Annex C (informative) - Calculation of the diffraction
        correction coefficient G[sf](R/[lambda],[beta]) in the
        free-field self-reciprocity calibration in a
        non-attenuating medium for a circular spherically
        curved transducer [2, 3, 4, 7]
Annex D (informative) - Speed of sound and attenuation
        in water
Annex E (informative) - Principle of reciprocity calibration
        for spherically curved transducers [2, 3, 4]
Annex F (informative) - Experimental arrangements
Annex G (informative) - Relationships between the
        electroacoustical parameters used in this
        application [13]
Annex H (informative) - Evaluation and expression of
        uncertainty in the measurements of the radiation
        conductance
Bibliography