11/30230872 DC : 0

1 Scope
2 Normative references
3 Terms and definitions
4 List of symbols
5 Ultrasonic field specifications
6 Conditions of measurement and test equipment used
7 Type testing reference procedures and measurements
8 Routine measurement procedure
9 Sampling and uncertainty determination
Annex A (informative) - Guidance for performance and
        safety
Annex B (normative) - Raster scan measurement and
        analysis procedures
Annex C (normative) - Diametrical or line scan
        measurement and analysis procedures
Annex D (informative) - Rationale concerning the
        beam cross-sectional area definition
Annex E (informative) - Factor used to convert the
        beam cross-sectional area (A[BCS]) at the
        face of the treatment head to the effective
        radiating area (A[ER])
Annex F (informative) - Determining acoustic power
        through radiation force
        measurements
Annex G (informative) - The validity of low-power
        measurements of the beam cross-sectional
        area (A[BCS])
Annex H (informative) - Influence of hydrophone
        effective diameter
Annex I (informative) - Effective radiating area
        measurement using a radiation force
        balance and absorbing apertures
Annex J (informative) - Guidance on uncertainty
        determination
Annex K (informative) - Bibliography

BS EN 61689.