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GB/T 47259-2026Noise transmission loss test method for aircraft fuselage structures (English PDF)

航空器机身结构隔声试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 31, 2026

Implementation date

October 1, 2026

Scope

GB/T 47259-2026 is the English-translated version of 航空器机身结构隔声试验方法.

GB/T 47259-2026 is the Chinese standard "Noise transmission loss test method for aircraft fuselage structures". Its scope clause reads: This document specifies the general requirements for sound insulation testing of aircraft fuselage structures, including the purpose, categories, items, and environment.

It also describes the... Test methods for sound insulation of fuselage wall panel structure and test methods for sound insulation of fuselage compartment structure.

This document applies to sound insulation testing of aircraft fuselage structures in a laboratory environment. It aims to obtain the sound attenuation of aircraft sections or the entire aircraft.

At that time, measurements were taken in accordance with the test method for sound insulation of fuselage section structure. Its clauses include terms and definitions.

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Document preview — GB/T 47259-2026

National Standard of the People's Republic of China

ICS: 49.090
Classification: V 44

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4 General Requirements
4.1 Experimental Objective
4.2 Test Classification
4.3 Test Item
4.4 Test Subjects
4.5 Test Environment
4.6 Test Personnel
4.7 Test Facilities and Equipment
4.8 Technical Documents
4.9 Test Interruption and Troubleshooting
5.Sound insulation test of fuselage wall panel structure
5.1 Sound Insulation Test Using the Reverberation Chamber-Anechoic Chamber Sound Intensity Method
5.2 Sound Insulation Test by Reverberation Chamber-Anechoic Chamber Sound Pressure Method
5.3 Test Specimen
5.4 Test Procedure
5.5 Experimental Data Processing
5.6 Evaluation of Test Results
6.Sound insulation test of fuselage section structure
6.1 Sound insulation test of fuselage section structure
6.2 Sound Insulation Test of Fuselage Section Sidewalls/Local Structures
6.3 Test Specimen
6.4 Test Procedure
6.5 Experimental Data Processing
6.6 Evaluation of Test Results
7 Test Report

1 Scope

This document specifies the general requirements for sound insulation testing of aircraft fuselage structures, including the purpose, categories, items, and environment. It also describes the...

Test methods for sound insulation of fuselage wall panel structure and test methods for sound insulation of fuselage compartment structure.

This document applies to sound insulation testing of aircraft fuselage structures in a laboratory environment. It aims to obtain the sound attenuation of aircraft sections or the entire aircraft.

At that time, measurements were taken in accordance with the test method for sound insulation of fuselage section structure.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 3785.1 Electroacoustic sound level meters – Part 1.Specifications

GB/T 3947-1996 Acoustic Terminology

GB/T 6882 Acoustic pressure method for determining the sound power level and sound energy level of a noise source – Precision method using anechoic chambers and semi-anechoic chambers

GB/T 17561 Sound intensity tester using a sound pressure transducer for measuring...

GB/T 19889.1 Acoustics – Measurement of sound insulation in buildings and building components – Part 1.Laboratory test setup for suppression of lateral sound transmission

Implementation Requirements

GB/T 41886-2022 Acoustic Design Requirements for Cabins of Transport Category Aircraft

3 Terms and Definitions

The terms and definitions defined in GB/T 3947-1996 and GB/T 41886-2022, as well as the following terms and definitions, apply to this document.

3.1

In a given noise environment, the ratio of transmitted sound intensity to incident sound intensity through the wall panel.

3.2 sound insulation

In a sound transmission system, it represents the decrease in sound pressure level from one point to another.

[Source. GB/T 41886-2022, 3.1.9, with modifications]

3.3 diffuse sound field

A sound field with uniform energy density and random distribution in all directions of propagation.

[Source. GB/T 3947-1996, 4.63]

3.4 reverberation time

A physical quantity that describes how quickly indoor sound decays.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

Referenced standards

Normative references

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