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MEASUREMENT AND CHARACTERISATION OF ULTRASONIC FIELDS USING HYDROPHONES IN THE FREQUENCY RANGE 0.5 MHZ TO 15 MHZ
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Available format(s): Hardcopy, PDF
Superseded date: 07-01-2010
Language(s): English
Published date: 01-01-1994
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
FOREWORDINTRODUCTION1 Scope2 Normative references3 Definitions4 List of symbols5 Measurement requirements 5.1 Requirements for hydrophones and amplifiers 5.1.1 General 5.1.2 Sensitivity of a hydrophone 5.1.3 Directional response of a hydrophone 5.1.4 Effective radius of a hydrophone active element 5.1.5 Choice of the size of a hydrophone active element 5.1.6 Bandwidth 5.1.7 Linearity 5.1.8 Hydrophone signal amplifier 5.2 Requirements for positioning systems and water baths 5.2.1 Positioning systems 5.2.2 Water bath 5.3 Requirements for measurement systems 5.4 Recommendations for ultrasonic equipment being characterized6 Specification of performance for hydrophones and amplifiers 6.1 Sensitivity 6.2 Effective radius 6.3 Hydrophone linearity 6.4 Hydrophone amplifiers7 Measurement procedures 7.1 Preparation and alignment 7.1.1 Preparation 7.1.2 Aligning a hydrophone 7.1.3 Aligning an ultrasonic transducer and hydrophone8 Beam characterisation 8.1 Primary pressure parameters 8.1.1 Peak-positive and peak-negative acoustic pressure 8.1.2 Pulse acoustic pressure 8.1.3 Spatial-peak pulse acoustic pressure 8.1.4 Spatial-peak r.m.s. acoustic pressure 8.1.5 Beam-average pulse acoustic pressure 8.1.6 Beam-average r.m.s. acoustic pressure 8.1.7 Spatial-average pulse acoustic pressure 8.1.8 Spatial-average r.m.s. acoustic pressure 8.1.9 Nonlinear propagation parameter 8.2 Derived intensity parameters 8.3 Derived pulse-intensity integral parameters9 Acoustic output specification and labellingAnnexesA (informative) A.1 Hydrophones A.1.1 Electrical loading considerations A.1.2 Hydrophone signal amplifier A.1.3 Alignment of hydrophones A.1.4 Types of hydrophone A.1.4.1 Ceramic probe hydrophones A.1.4.2 PVDF probe hydrophones A.1.4.3 PVDF membrane hydrophones A.1.4.4 Relative performance of different types A.1.5 Typical specification data for hydrophonesB (informative) B.1 Acoustic pressure and intensityC (informative) C.1 Transducer and hydrophone positioning systemsD (informative) RationaleAnnex ZA (normative) Other International Publications quoted in this standard with the references of the relevant European PublicationsBibliographyFigures
Defines the methods of use of calibrated piezoelectric hydrophones for the measurement in liquids of acoustic fields generated by ultrasonic medical equipment operating in the frequency range 0,5 MHz to 15 MHz.
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