Table of Contents

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

Abstract

Specifies: a) the free-field convergent spherical wave self-reciprocity method for ultrasonic transducer calibration, b) the measurement conditions and experimental procedure required to determine the transducer's electroacoustic parameters and acoustic output power using the self-reciprocity method, c) the criteria for checking the reciprocity of these transducers and the linear range of the focused field, and d) guiding information for the assessment of the overall measurement uncertainties for radiation conductance.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	British Standards Institution
Pages
ISBN
Committee	EPL/87