ULTRASONICS - HAND-HELD PROBE DOPPLER FOETAL HEARTBEAT DETECTORS - PERFORMANCE REQUIREMENTS AND METHODS OF MEASUREMENT AND REPORTING
International Electrotechnical Committee
FOREWORD
INTRODUCTION
Clause
1 Scope
2 Normative references
3 Definitions
4 List of symbols
5 Configuration
6 Performance
6.1 Acoustic working frequency
7 Safety
8 Tests
8.1 Acoustic working frequency
8.2 Output power
8.3 Spatial-peak temporal-peak acoustic pressure
8.4 Effective area of the ultrasonic transducer
active element
8.5 Overall sensitivity
9 Preferred method for reporting performance of
existing equipment
10 Specifications for labelling
11 Sampling
Figures
Annexes
A Choice of target and determination of target
plane-wave reflection loss
B Typical test equipment and test procedures
C Determination of the two-way insertion loss of
acoustic attenuators
D Rationale
E Bibliography
Applies to ultrasonic Doppler foetal heartbeat detectors which generate a single ultrasound beam and consist of a hand-held probe which is applied to the maternal abdomen to obtain information on foetal heart activity by means of the Doppler method using continuous wave (c.w) or quasi-continuous wave ultrasound. Establishes methods of measurement of performances, requirements for the performance and the reporting of performance.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 87 |
