GB/T 2423.47-2018 "Environmental Testing - Part 2: Test Methods - Test Fg: Acoustic Vibration": This standard replaces the 1997 version and was implemented on July 1, 2019. It provides methods and guidelines for acoustic vibration testing to determine the ability of specimens to withstand vibration induced by acoustic pressure excitation. Testing is generally not required when the sound pressure level is below 120 dB. The standard includes the progressive wave tube method and the reverberation chamber method. The former is suitable for scenarios involving unilateral aerodynamic turbulent excitation, while the latter is applicable to scenarios with distributed excitation across the entire surface. These methods can be used to assess mechanical weaknesses, performance degradation, and mechanical or fatigue strength of specimens.