GB/T 17249.3-2012 English PDF

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GB/T 17249.3-2012: Acoustics -- Recommended practice for the design of low-noise workplaces containing machinery -- Part 3: Sound propagation and noise prediction in workrooms
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Basic data

Standard ID: GB/T 17249.3-2012 (GB/T17249.3-2012)
Description (Translated English): Acoustics -- Recommended practice for the design of low-noise workplaces containing machinery -- Part 3: Sound propagation and noise prediction in workrooms
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A59
Classification of International Standard: 17.140
Word Count Estimation: 33,340
Quoted Standard: GB/T 17249.1-1998
Adopted Standard: ISOTR 11690-3-1997, IDT
Regulation (derived from): National Standards Bulletin No. 28 of 2012
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 sound propagation within the workplace and workplace noise exposure SPL and a prediction method. Noise prediction scheme in the physical phenomena described in details and the environment and the environment for the modeling me

GB/T 17249.3-2012: Acoustics -- Recommended practice for the design of low-noise workplaces containing machinery -- Part 3: Sound propagation and noise prediction in workrooms

---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.
ICS17.140 A59 National Standards of People's Republic of China Low acoustic noise in the workplace Design Guide Part 3. Sound propagation within the workplace And noise prediction Part 3. Soundpropagationandnoisepredictioninworkrooms (ISO /TR11690-3.1997, IDT) Issued on. 2013-02-15 2012-11-05 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 indoor sound propagation Fundamentals 1 Noise Prediction Workshop 3 5 6 Workplace Noise Prediction Method 5 7 Noise Prediction for further consideration of aspects 8 Three examples in the Appendix A (informative) workplace noise prediction research 10 Annex B (informative) Prediction existing workplace noise 17 new machines Position within Appendix C (informative) machine work workplace sound pressure levels determined 24 Estimated 24 Annex D (informative) acoustic properties of the workplace Appendix E (normative) Noise Prediction Method 26 recommendations References 27

Foreword

GB/T 17249 "low - noise workplaces Design Guide" is divided into three parts. Part 1. Noise control programs; Part 2. Noise control measures; Part 3. Sound propagation and noise prediction within the workplace. This section is part 3 GB/T 17249 in. Rules in this section in accordance with GB/T 1.1-2009 given draft. This part identical with ISO /TR11690-3.1997 (E) "low - noise workplaces Design Guide Part 3 work Sound propagation and noise within the inter-prediction. " This section made editorial changes. This section proposed by the Chinese Academy of Sciences. The acoustics in part by the National Standardization Technical Committee (SAC/TC17). This section is drafted. Nanjing University Institute of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing Labor Protection Science Research Institute, Tongji University, Hefei University of Technology, long Shaao Bang Industrial Co., Ltd. of environmental protection. The main drafters of this section. Qiu Xiaojun, Tian Jing, Yang Jun, Zhang Bin, Zhou Yu Wu, Li Zhiyuan, Mo Jian Yan, Xu Xin.

Introduction

All relevant departments for this section relates to workplace noise control and low noise in the workplace designed using its purpose is. --- All relevant departments to understand the current state of the art workshop sound propagation and noise prediction aspects; --- Assist the relevant departments to communicate in a common technical framework; --- Promoting hope to achieve understanding of noise control requirements. This section provides a sound source within the workplace (such as the machine is running) and launch contact between the SPL position work. Hereby, Noise emission values \u200b\u200bof machinery suppliers and require a low noise values \u200b\u200birradiation machine users can exchange information. A further object of this section is to assess the acoustic performance within the workplace. These tasks are described by determining the amount of sound propagation within the workplace to contact each other. This section presents the noise prediction method within the workplace, and presents a framework for noise prediction, noise prediction method by which the various According to different parameters can provide the level of detail to divide. Low acoustic noise in the workplace Design Guide Part 3. Sound propagation within the workplace And noise prediction

1 Scope

This part of this standard specifies a sound propagation prediction methods and workplace sound pressure levels and noise exposure within the workplace. Noise prediction scheme is described in detail and the environment against the physical phenomena and modeling methods (the input parameters, calculated) of the Environment Closely related. This section summarizes the relationship, described the noise prediction method, and provides the use of noise prediction noise in the workplace Recommendation sound control. Appendix A ~ Appendix E gives an example of the application of noise prediction methods.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated edition applies to this article Member. For undated references, the latest edition (including any amendments) applies to this document. GB/T 17249.1-1998 low acoustic noise design guidelines workplace noise control programs (ISO 11690-1.1996, EQV) Note. The specific standard interior sound field distribution curve measured see GB/T 27763-2011.

3 Terms and Definitions

GB/T 17249.1-1998 defined terms and definitions apply to this document. Fundamentals 4 indoor sound propagation 4.1 describes the amount of sound propagation Fundamentals of workplace noise prediction is to predict the non-directional sound pressure level distribution point sound source. The distribution and the following factors related. --- Interior shape and volume; --- Each surface of indoor sound absorption; --- Interior arrangement. Space sound field distribution curve of the room (see GB/T 17249.1-1998 in 3.4.11 and Figures 1 and 2) expressed its acoustic energy distribution Results within a given distance, the sound field spatial information distribution curve contains two parameters can be summarized as follows (see GB/T 17249.1- 1998 3.4.12 and 3.4.13). --- SPL distance doubling the amount of space attenuation (DL2) --- With respect to the free-field sound pressure level than the amount of attenuation (DLf) Spatial sound field distribution curves of these two parameters are used to describe the acoustic characteristics of a room. If DLf lower, DL2 higher by Given the smaller the sound pressure level generated by the sound source (see GB/T 17249.2-2005 6.3) Appendix D describes how to use sound field distribution Curve describes the acoustic characteristics of a room. ......

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