S.R. CLC/TS 61949:2008
Current
The latest, up-to-date edition.
ULTRASONICS - FIELD CHARACTERIZATION - IN SITU EXPOSURE ESTIMATION IN FINITE-AMPLITUDE ULTRASONIC BEAMS
Hardcopy , PDF
English
01-01-2008
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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 List of symbols
5 Equipment required
6 Test methods
6.1 Establishing quasi-linear conditions
6.1.1 The local distortion parameter
6.1.2 Upper limit for quasi-linear conditions for sigma[q]
6.1.3 Range of applicability for quasi-linear conditions
6.2 Measurement procedure for estimated in situ exposure
6.2.1 Identification of quasi-linear conditions
6.2.2 Tables of limiting mean peak acoustic pressure
6.2.3 Measurement of acoustic quantities under quasi-linear
conditions
6.2.4 Measurement of the scaling factor
6.2.5 Calculation of attenuated acoustic quantities
6.3 Uncertainties
Annex A (informative) Review of evidence
Annex B (informative) Review of alternative methods for managing
finite-amplitude effects during field measurement
Annex C (informative) Parameters to quantify nonlinearity
Annex D (informative) Tables of upper limits for mean peak
acoustic pressure for quasi-linear conditions
Bibliography
Specifies means to allow 'attenuated' acoustic quantities to be calculated under conditions where the associated acoustic measurements, made in water using standard procedures, may be accompanied by significant finite-amplitude effects.
| DevelopmentNote |
For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
|
| DocumentType |
Standard
|
| Pages |
42
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Standards | Relationship |
| CLC/TS 61949:2008 | Identical |
| IEC TS 61949:2007 | Identical |
| IEC 62127-1:2007+AMD1:2013 CSV | Ultrasonics - Hydrophones - Part 1: Measurement and characterizationof medical ultrasonic fields up to 40 MHz |
| IEC 60601-2-37:2007+AMD1:2015 CSV | Medical electrical equipment - Part 2-37: Particular requirements for the basic safety and essential performance of ultrasonic medical diagnostic and monitoring equipment |
| IEC 61161:2013 | Ultrasonics - Power measurement - Radiation force balances and performance requirements |
| IEC 61828:2001 | Ultrasonics - Focusing transducers - Definitions and measurement methods for the transmitted fields |
| EN 61161:2013 | Ultrasonics - Power measurement - Radiation force balances and performance requirements |
| IEC 62359:2010+AMD1:2017 CSV | Ultrasonics - Field characterization - Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields |
| EN 62127-1:2007/A1:2013 | ULTRASONICS - HYDROPHONES - PART 1: MEASUREMENT AND CHARACTERIZATION OF MEDICAL ULTRASONIC FIELDS UP TO 40 MHZ (IEC 62127-1:2007/A1:2013) |
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