GB/T 31004.3-2014 English PDF

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GB/T 31004.3-2014: Acoustics -- Measurement of sound insulation in buildings and of building elements using sound intensity -- Part 3: Laboratory measurements at low frequencies
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 31004.3-2014	314	Add to Cart	3 days	Acoustics -- Measurement of sound insulation in buildings and of building elements using sound intensity -- Part 3: Laboratory measurements at low frequencies	Valid

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GB/T 31004.1   GB/Z 27764   GB/T 25078.1   GB/T 20243.2   GB/T 45305.4   GB/T 31004.2   

Basic data

Standard ID: GB/T 31004.3-2014 (GB/T31004.3-2014)
Description (Translated English): Acoustics -- Measurement of sound insulation in buildings and of building elements using sound intensity -- Part 3: Laboratory measurements at low frequencies
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 16,185
Date of Issue: 9/3/2014
Date of Implementation: 2/1/2015
Quoted Standard: GB/T 17561-1998; GB/T 19889.1-2005; GB/T 19889.3-2005; GB/T 19889.10-2006; IEC 60942; ISO 9614-1-1993
Adopted Standard: ISO 15186-3-2002, IDT
Regulation (derived from): People's Republic of China Announcement of Newly Approved National Standards No. 21 of 2014
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Standard specifies the method for measurement of sound intensity low frequency sound insulation of building elements and components using standardized sound level difference. In a typical test facility, the reproducibility of the method was superior

GB/T 31004.3-2014: Acoustics -- Measurement of sound insulation in buildings and of building elements using sound intensity -- Part 3: Laboratory measurements at low frequencies

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
. Acoustics Measurement of sound insulation in buildings and of building elements using sound intensity Part 3.. Laboratory measurements at low frequencies ICS 17.140 A59 National Standards of People's Republic of China Building acoustics and sound insulation of building elements sound intensity measurement Part 3. Laboratory measurements of low frequency usingsoundintensity-Part 3. Laboratorymeasurementsatlowfrequencies (ISO 15186-3.2002, IDT) Issued on. 2014-09-03 2015-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 31004 "Building acoustics and sound insulation of building elements sound intensity measurement" is divided into the following sections. --- Part 1. Laboratory measurements; --- Part 2. Field measurements; --- Part 3. Laboratory measurements of low frequencies. This section GB/T Part of 331,004. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with 15186-3 ISO .2002 "Part 3 Acoustics buildings and strong sound insulation of building elements Measurement Score. Laboratory measurements of low frequencies. " Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 15173-2010 electric acoustic sound calibrator (IEC 60942.2003, IDT); --- GB /Determination of sound power levels of noise sources - Part 1 T 16404-1996 sound intensity method. Measurement (eqv discrete points ISO 9614-1.1993). This section proposed by the Chinese Academy of Sciences. The acoustics in part by the National Standardization Technical Committee (SAC/TC17) centralized. This section is drafted. South China University of Technology, China Academy of Building Research, Chinese Academy of Sciences Institute of Acoustics, Institute of Yunnan Province, no Tin Jixing auto parts Acoustic Technology Co. The main drafters of this section. Zhe Zhao Yue, Wu Shuo Yin, Cai Yang raw, Sun Haitao, Tan Hua, Lv Yadong, Liubi Long, Li Jiaquan, Huang Wei. Building acoustics and sound insulation of building elements sound intensity measurement Part 3. Laboratory measurements of low frequency

1 Scope

1.1 Overview This section GB/T 31004 specifies the use of low sound intensity measurement frequency sound insulation of building elements and components standardized sound level difference square law. In a typical test facility, the reproducibility of the method was superior to GB/T 19889.3, GB/T 19889.10 and GB/T 31004.1 method. Laboratory test results are more independent of the size of the room and closer to the measured value is greater than the volume in the room when 300m3. This section Standards can be applied to the frequency range of 50Hz ~ 160Hz, but it is mainly used in the frequency range of 50Hz ~ 80Hz. Note. For building elements having a large thickness of the porous surface of the absorption of the surface layer, the recommended frequency range of 50Hz ~ 80Hz. This part of GB /31004.1 The main difference between the T comprising. a) measurement of sound pressure level of the sound source is close to the surface of the test chamber member performed; Surface b) receiving chamber opposite the building elements are strong absorption, which allows the formation of a room acoustic waveguide in the lowest cut-off frequency It has spread over a number of cross pattern. Part of the present method of measuring results with the use of GB/T 19889.3 and GB/T 31004.1 measurements combined to eligible Measurement data obtained from 50Hz ~ 5000Hz frequency range. 1.2 Accuracy On all bands, complex sound intensity method of estimation can now equivalent to or better than the use of GB/T 19889.3-2005 Methods 100Hz when Reproducibility. By measuring the data in this section with the use of a number of relatively GB/T 19889.3-2005 measurement data are given in Appendix B.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 17561-1998 sound intensity measuring instrument with measurement of sound pressure microphone (IEC 61043.1993, IDT) Laboratory test with suppressed flanking transmission. GB/T 19889.1-2005 Acoustics Measurement of sound insulation buildings and building elements - Part 1 Test facility requirements (ISO 140-1.1997, IDT) GB/T 19889.3-2005 Acoustics Measurement of sound insulation buildings and building elements - Part 3. airborne sound insulation of building elements experiment Chamber measurements (ISO 140-3.1995, IDT) GB/T 19889.10-2006 buildings and building elements Acoustics Measurement of sound insulation - Part 10. Small airborne sound insulation of building elements Laboratory measurements (ISO 140-10.1991, IDT) IEC 60942 electrical acoustic sound calibrator (Electroacoustics-Soundcalibrators) ISO 9614-1.1993 Acoustics - Determination of partial intensity method of sound power levels of noise sources 1. Measurement at discrete points (Acoustics-Determinationofsoundpowerlevelsofnoisesourcesusingsoundintensity-Part 1. Measurementatdiscretepoints) ......

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