ULTRASONICS - FIELD CHARACTERIZATION - IN SITU EXPOSURE ESTIMATION IN FINITE-AMPLITUDE ULTRASONIC BEAMS
International Electrotechnical Committee
FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 List of symbols<br>5 Equipment required<br>6 Test methods<br> 6.1 Establishing quasi-linear conditions<br> 6.1.1 The local distortion parameter<br> 6.1.2 Upper limit for quasi-linear conditions for sigma[q]<br> 6.1.3 Range of applicability for quasi-linear conditions<br> 6.2 Measurement procedure for estimated in situ exposure<br> 6.2.1 Identification of quasi-linear conditions<br> 6.2.2 Tables of limiting mean peak acoustic pressure<br> 6.2.3 Measurement of acoustic quantities under quasi-linear <br> conditions<br> 6.2.4 Measurement of the scaling factor<br> 6.2.5 Calculation of attenuated acoustic quantities<br> 6.3 Uncertainties<br>Annex A (informative) Review of evidence<br>Annex B (informative) Review of alternative methods <br> for managing finite-amplitude effects during <br> field measurement<br>Annex C (informative) Parameters to quantify nonlinearity<br>Annex D (informative) Tables of upper limits for mean peak <br> acoustic pressure for quasi-linear conditions<br>Bibliography
Establishes the general concept of the limits of applicability of acoustic measurements in water resulting from finite-amplitude acoustic effects and a method to ensure that measurements are made under quasi-linear conditions in order to minimise finite-amplitude effects.
| Document Type | Standard |
| Status | Current |
| Publisher | International Electrotechnical Committee |
| Committee | TC 87 |
