GB/T 2423.47-2018: Environmental testing - Part 2: Test methods - Test Fg: Acoustic vibration

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Scope

This Part of GB/T 2423 provides standard procedures and guidance for conducting acoustic
tests in order to determine the ability of a specimen to withstand vibration caused by a specified
sound-pressure level environment to which it is, or is liable to be, subjected.
For sound pressure level environments of less than 120 dB acoustic tests are not normally
required.
This Part determines the mechanical weakness and/or degradation in the performance of
specimens and to use this information, in conjunction with the relevant specification, to decide
on their acceptability for use. The methods of test may also be used as a means of establishing
the mechanical robustness or fatigue resistance of specimens.
Two procedures are described for conducting tests and for measurement of the sound pressure
levels within the acoustic noise field and considers the need for measurement of the vibration
responses at specified points on the specimen. It also gives guidance for the selection of the
acoustic noise environment, spectrum, sound pressure level and duration of exposure.
The progressive wave tube method is relevant to material where aerodynamic turbulence will
excite part, or all, of the total external surface. Such applications include aircraft panel
assemblies where the excitation exists on one side only. The reverberation chamber method is
relevant where it is preferable to induce vibration onto the entire external surface of equipment
by distributed excitation rather than fixed points by means of electro-dynamic shakers.

Basic Data

Standard ID	GB/T 2423.47-2018 (GB/T2423.47-2018)
Description (Translated English)	Environmental testing - Part 2: Test methods - Test Fg: Acoustic vibration
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K04
Classification of International Standard	19.040
Word Count Estimation	23,247
Date of Issue	2018-12-28
Date of Implementation	2019-07-01
Older Standard (superseded by this standard)	GB/T 2423.47-1997
Quoted Standard	GB/T 27025-2008; IEC 61672-1
Regulation (derived from)	National Standard Announcement No. 17 of 2018
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration
Summary	This standard specifies test methods and guidelines for determining the ability of a sample to withstand or may be subjected to vibrations caused by a specified sound pressure level noise environment. In general, acoustic vibration testing is not required for environments with sound pressure levels below 120 dB. Determine the mechanical weakness and degradation of the test sample under specified acoustic test conditions and evaluate with other regulations whether they are acceptable. In some cases, this test method is also used as a method of determining the mechanical strength or fatigue strength of a test sample. This standard contains two test methods, which describe the acoustic vibration test and the process of measuring the sound pressure level in a noisy environment and take into account the need for the special point vibration response measurement of the test sample. The noise environment, spectrum, and sound pressure are also selected. Level and exposure duration