1 Scope
This standard specifies the method to measure complex reflection coefficient of sample of underwater acoustic materials under the condition of steady state plane wave with pulse sound technology and calculate longitudinal wave velocity and attenuation coefficient of the sample materials in rigid thick-walled acoustic tube.
This standard is applicable to uniform and compact polymer materials for underwater sound.
2 Normative References
The following standards contain provisions which, by reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding correction to), or revisions of, any of these publications do not apply. However, parties to coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents applies. For undated ones, the latest edition of the document referred to applies.
GB/T 3223—1994 Acoustics - Free-field Calibration Method of Underwater Sound Transducers
GB/T 3947—1996 Acoustical Terminology
GB/T 4472—1984 General Rule for Determination of Density and Relative Density for Chemical Products
3 Terms and Definitions
For the purposes of this standard, the terms and definitions specified in GB/T 3947-1996 and the following ones apply.
3.1
Pulse tube
Foreword I
1 Scope 1
2 Normative References 1
3 Terms and Definitions 2
4 Symbols and Abbreviations 2
5 Measurement Principle 3
6 Measuring Device and Sample 5
7 Measuring Methods 8
8 Measuring Uncertainty 10
Appendix A (Informative) Sound Velocity Measurement for Water in Pulse Tube 11
Appendix B (Informative) Bibliography 12
