IEC TR 60782:1984

FOREWORD
PREFACE
List of symbols
SECTION ONE - INTRODUCTION
Clause
1 Scope
2 Object
3 Classification of transducers
4 List of essential characteristics
5 Definitions of characteristics and their symbols
   5.1 Input electrical power
   5.2 Electroacoustical efficiency of the transducer
   5.3 Vibrational displacement amplitude
   5.4 Frequency of resonance
   5.5 Bandwidth
   5.6 Electrical impedance of the transducer
   5.7 Blocked (damped) electrical impedance of the transducer
SECTION TWO - MEASURING CONDITIONS
6 General
7 Operating parameters
8 Acoustical liquid load
9 Preparation for measurement of P-category transducers
   9.1 Preparation of the transducer
   9.2 Preparation of water
10 General requirements for the instrumentation
SECTION THREE - MEASURING PROCEDURES
11 Electrical input power
   11.1 Wattmeter method
   11.2 Impedance method
   11.3 Three voltmeter method
12 Electroacoustical efficiency
   12.1 Calorimetric-wattmeter method
   12.2 Power flow method
   12.3 Wattmeter method
   12.4 Impedance diagram method
13 Vibrational displacement amplitude
   13.1 Optical microscope method
   13.2 Vibrometer methods
14 Frequency of resonance of the transducer
   14.1 Maximum power method
   14.2 Maximum amplitude method
   14.3 Impedance characteristic method
15 Bandwidth and mechanical quality factor
   15.1 Input power frequency characteristic method
   15.2 Amplitude frequency characteristic method
16 Electrical impedance of the transducer at resonance
   16.1 Voltmeter and wattmeter method
   16.2 Bridge method
   16.3 Voltmeter and phasemeter method
   16.4 Three voltmeter method
17 Blocked (damped) electrical impedance of the transducer
APPENDIX A - Measuring conditions
APPENDIX B - Basis of the calorimetric method of measuring
             the acoustic power and its limitations
APPENDIX C - Basis of the wattmeter method and of the
             impedance diagram method of measurement of
             transducer efficiency
APPENDIX D - Vibrometers for non-contact measurements of
             displacement amplitude
APPENDIX E - Bibliography
FIGURES

Applies to magnetostrictive transducers, of both laminated metal and ferrite types, designed for producing sonic or ultrasonic acoustic power in liquid or solid media, and for different kinds of ultrasonic processing such as cutting, welding, chemical processing, etc. Transducers for information carrying signals are excluded. The transducers, which may be sonic or ultrasonic, operate at the resonance frequency and are supplied from electric power generators. Specifies the essential characteristics and the preferred methods of measurement for evaluating the performance of transducers. Has the status of a technical report.