IEC TS 62903-2023 PDF

Full title and description

IEC TS 62903:2023 — Ultrasonics — Measurements of electroacoustical parameters and acoustic output power of spherically curved transducers using the self‑reciprocity method. This Technical Specification defines the free‑field convergent spherical‑wave self‑reciprocity method for calibration of spherically curved (concave, circular) ultrasonic transducers and gives the measurement conditions, experimental procedures, reciprocity checks, linear‑range criteria and guidance for uncertainty assessment when determining electroacoustical parameters and acoustic output power.

Abstract

IEC TS 62903:2023 establishes a practical procedure for calibration and characterization of circular, spherically curved concave focusing transducers (without a centric hole) operating in the linear amplitude range. It specifies frequency and amplitude applicability, reciprocity‑checking criteria and provides guidance on estimating overall measurement uncertainties (radiation conductance). The 2023 edition is a technical revision of the original 2018 publication and includes updates such as recognizing several quantities as complex‑valued and the addition of an annex with example measurement ranges and calibration results.

General information

• Status: Current Technical Specification.
• Publication date: 13 June 2023.
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 17.140.50 (Electroacoustics).
• Edition / version: Edition 2.0 (2023).
• Number of pages: 53 pages.

Scope

This document applies to circular spherically curved concave focusing ultrasonic transducers without a centric hole, operating in their linear amplitude range. It is intended for measurements in the frequency range 0.5 MHz to 15 MHz and for acoustic pressure amplitudes in the focused field that remain within the linear amplitude range. The specification excludes hydrophone characterization by reciprocity (those topics are addressed in IEC 62127‑2 and IEC 60565‑1). IEC TS 62903:2023 cancels and replaces the first edition published in 2018.

Key topics and requirements

• Definition and establishment of the free‑field convergent spherical‑wave self‑reciprocity calibration method for focused ultrasonic transducers.
• Required measurement conditions and step‑by‑step experimental procedures to determine electroacoustical parameters and acoustic output power.
• Criteria and tests to verify the reciprocity of transducers and to identify the linear range of the focused field.
• Guidance and recommended approaches for assessing overall measurement uncertainty for radiation conductance and related quantities; several quantities are treated as complex‑valued in this edition.
• Annex providing typical measurement ranges and example calibration results to support practical implementation.

Typical use and users

Intended users are national metrology institutes, accredited calibration laboratories, ultrasonic transducer manufacturers, research laboratories and test facilities that perform absolute or comparative calibrations of focused ultrasonic transducers. The TS supports accurate determination of transducer transmitting characteristics and acoustic output power for medical, industrial and research ultrasonic applications where focused transducers are employed.

Related standards

Key related documents include standards on hydrophone calibration and free‑field procedures, notably IEC 62127‑2 (Hydrophones — Calibration for ultrasonic fields) and IEC 60565‑1 (Hydrophones — Procedures for free‑field calibration). These documents cover hydrophone calibration methods and complement the transducer‑focused reciprocity procedures given in IEC TS 62903.

Keywords

ultrasonics, transducer calibration, self‑reciprocity, spherical wave, focused transducer, acoustic output power, electroacoustical parameters, radiation conductance, uncertainty, hydrophone (related).

FAQ

Q: What is this standard?

A: IEC TS 62903:2023 is a Technical Specification that defines the self‑reciprocity method and measurement procedures for calibration and characterization of spherically curved (concave) focused ultrasonic transducers.

Q: What does it cover?

A: It covers the free‑field convergent spherical‑wave self‑reciprocity method, experimental conditions and procedures to determine electroacoustical parameters and acoustic output power, checks for reciprocity and linear operating range, and guidance on evaluating measurement uncertainty for radiation conductance; applicable frequencies are 0.5 MHz to 15 MHz for the targeted transducer types.

Q: Who typically uses it?

A: National metrology institutes, calibration and test laboratories, manufacturers of focused ultrasonic transducers, and research groups working with ultrasonic measurement and calibration tasks.

Q: Is it current or superseded?

A: IEC TS 62903:2023 is the current edition (Edition 2.0, published 13 June 2023) and cancels/replaces IEC TS 62903:2018.

Q: Is it part of a series?

A: It is part of the IEC ultrasonics/metrology family maintained by TC 87. It complements other IEC documents on hydrophone calibration and ultrasonic field measurement (for example IEC 62127‑2 and IEC 60565‑1) rather than being a numbered “part” of a single multipart standard.

Q: What are the key keywords?

A: Self‑reciprocity, spherical wave, focused transducer, electroacoustical parameters, acoustic output power, radiation conductance, calibration, uncertainty, hydrophone (related).