JJF 2388-2026 Calibration Specification for Acoustic Performance Parameters Measure-ment Systems of Underwater Acoustic Materials(Free-Field Method)

JJG 449-2001 Octave-Band and One-Third-Octave Band Filters JJG 449-2014 Octave-Band and Fractional-Octave-Band Filters JJF 1001-1998 General Terms in Metrology and Their Definitions JJF 1001-2011 General Terms in Metrology and Their Definitions JJF 1034-2020 Terms and Definitions for Acoustical Metrology JJF 1059.1-2012 Evaluation and Expression of Uncertainty in Measurement GB/T 3102.7-1993 Quantities and units—Acoustics GB/T 3223-1994 Acoustics—Free-field calibration method of underwater sound transducers GB/T 3947-1996 Acoustical terminology GB/T 14369-1993 Acoustics—Measurement method of insertion loss and echo reduction for the underwater acoustical material sample GB/T 14369-2011 Acoustics—Measurement methods of insertion loss,echo reduction and sound absorption coefficient for underwater acoustical material samples GB/T 32523-2016 Acoustics—Measurement of sound pressure reflection coefficient, sound pressure transmission coefficient and absorption coefficient for underwater acoustical material sample—Travelling wave tube method