ASA S1.20 2012
$91.54
ANSI/ASA S1.20-2012 American National Standard Procedures for Calibration of Underwater Electroacoustic Transducers
| Published By | Publication Date | Number of Pages |
| ASA | 2012 | 64 |
None
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 9 | 1 Scope 2 Normative references 3 Terminology 4 Letter symbols 5 Applications 5.1 Application statement 5.2 Measurement types 5.3 Transmit and acoustic boundary considerations |
| 10 | 5.4 Annexes 6 Procedures for measuring performance characteristics 6.1 Preparing transducers for measurement |
| 12 | 6.2 Receive sensitivity methods and measurement conditions 6.3 Measurement of sensitivity and response-audio and ultrasonic frequency range |
| 17 | 6.4 Directional response of sensitivity and response measurement |
| 18 | 6.5 Voltage coupling loss 6.6 Electrical impedance and admittance measurements 6.7 Equivalent noise pressure |
| 19 | 7 Data reporting 7.1 Data reporting requirements |
| 20 | 7.2 Format of data presented 7.3 Specification of orientation |
| 21 | 7.4 Directional response graphic representation |
| 22 | 7.5 Presentation of electrical impedance and admittance data 8 Correction factors |
| 23 | 8.1 Hydrophone electrical loading corrections |
| 25 | 8.2 Transmit response corrections for transducers with extension cables 8.3 Attenuation correction 9 Uncertainties in free-field transducer calibrations 9.1 Introduction |
| 26 | 9.2 Reported uncertainty |
| 27 | 9.3 Common sources of uncertainty in free-field calibrations |
| 28 | 9.4 Uncertainty considerations |
| 30 | 10 Computation of derived characteristics 10.1 Directionality measures |
| 32 | 10.2 Acoustic power output (Pac) and acoustic power level (LP |
| 33 | 10.3 Electrical power input (Pel ii © 2012 Acoustical Society of America – All rights reserved 10.4 Transmitting efficiency |
| 34 | 10.5 Open-circuit effective bandwidth 10.6 Quality factor (Q |
| 35 | 11 References |
| 37 | Annex A Free-field calibration in a laboratory tank |
| 40 | Annex B Medium correction factors B.1 Mass density B.2 Sound speed |
| 41 | B.3 Absorption coefficient |
| 43 | Annex C Measurement of sensitivity and response—infrasonic and low audio-frequency range C.1 Coupler reciprocity calibration of a hydrophone |
| 45 | C.2 Secondary sensitivity calibration |
| 47 | Annex D Phase of free-field voltage sensitivity via reciprocity method |
| 50 | Annex E Nonlinear effects including cavitation |
| 54 | Annex F Standard-target method for calibrating active sonars F.1 Standard target F.2 Theory |
| 56 | F.3 Applicability |
| 59 | Bibliography |
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