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LY/T 2559-2015 English PDF

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LY/T 2559-2015: Measurement of sound-absorption of wood-based panels in small reverberation chamber
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Basic data

Standard ID LY/T 2559-2015 (LY/T2559-2015)
Description (Translated English) Measurement of sound-absorption of wood-based panels in small reverberation chamber
Sector / Industry Forestry Industry Standard (Recommended)
Classification of Chinese Standard B70
Classification of International Standard 79.060.01
Word Count Estimation 8,820
Date of Issue 2015-10-19
Date of Implementation 2016-01-01
Quoted Standard GB/T 3240; GB/T 3785.1; GB/T 3947; GB/T 4129-2003; GB/T 17247.1-2000; GB/T 20247-2006; GB/T 20441.4-2006; SJ/T 10406-1993
Regulation (derived from) National Forestry Anministration Announcement ��2015 No.19��
Issuing agency(ies) State Forestry Administration
Summary This standard specifies the terms and definitions, principles, equipment, test procedures and test reports for the small reverberation chamber method for the determination of sound absorption performance of wood-based panels. This standard applies to sound-absorbing panel of wood-based panel performance measurement.

LY/T 2559-2015: Measurement of sound-absorption of wood-based panels in small reverberation chamber


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Measurement of sound-absorption of wood-based panels in small reverberation chamber ICS 79.060.01 B70 People's Republic of China Forestry Industry Standard Wood-based panel sound-absorbing performance measurement small reverberation room Released on October 18,.2015 2016-01-01 implementation State Forestry Administration released

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Standardization Technical Committee for Wood-based Panels (SAC/TC198). Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was drafted. Zhejiang Forestry Product Quality Inspection Station, China Academy of Forestry Science Institute of Wood Industry, Beijing Labor Insurance Institute of Nursing Science, Beijing Prestige Acoustic Technology Co., Ltd., Beijing Century Siac Acoustics Technology Co., Ltd., Guangdong Yaodonghua Furniture Sheet Limited company, Guangzhou Liyin Building Materials Co., Ltd. The main drafters of this standard. Army, Peng Limin, Wang Dong, Song Bozhen, Wang Kunquan, Qi Huatong, Su Hongbing, Zhang Zhongling, Zeng Minhua, Liu Jinghua, Ma Xuan, Tang Rongqiang, Hong Yanquan, Wang Junfeng, Wang Zeng, Yang Liu. Wood-based panel sound-absorbing performance measurement small reverberation room

1 Scope

This standard specifies the terms and definitions, principles, equipment, test procedures and test reports for the sound-reducing performance of wood-based panels. This standard applies to the determination of sound absorption properties of wood-based panels.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Common frequencies in GB/T 3240 acoustic measurements GB/T 3785.1 Electroacoustic sound level meters - Part 1. Specification GB/T 3947 acoustic terminology GB/T 4129-2003 Acoustics Performance and calibration requirements for standard sound sources for sound power level determination GB/T 17247.1-2000 Acoustical outdoor sound propagation attenuation - Part 1. Calculation of atmospheric sound absorption GB/T 20247-2006 Acoustic reverberation chamber sound absorption measurement GB/T 20441.4-2006 Measurement microphones - Part 4 SJ/T 10406-1993 General technical conditions for audio power amplifiers

3 Terms and definitions

The following terms and definitions as defined in GB/T 3947 and GB/T 20247-2006 apply to this document. 3.1 Reverberation time The time required to stop the sound source after the sound has stabilized, and the average sound energy density decays from the original value by one millionth (60dB), the unit For seconds. [GB/T 20247-2006, definition 3.2] 3.2 Specimen sound absorption equivalentsoundabsorptionareaofthetestspecimen AT The difference in sound absorption of the reverberation chamber with and without the test piece. [GB/T 20247-2006, definition 3.7] 3.3 Sound absorption coefficient Αs The ratio of the sound absorption of the test piece to the area of the test piece. [GB/T 20247-2006, definition 3.9]

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