GB/T 17249.3-2012 in English

《GB/T 17249.3-2012声学 低噪声工作场所设计指南 第3部分：工作间内的声传播和噪声预测》由TC17（全国声学标准化技术委员会）归口，主管部门为中国科学院。

1 Scope

This part specifies the sound propagation in a room is considered together with the prediction of sound pressure levels and of noise immission at the workplace.

Details of the description of the physical phenomena involved in a noise prediction scheme are strongly dependent on the situation being considered and the way this situation is modelled (input parameters, calculation techniques). This dependency is surveyed and the methodology for noise prediction is described. Recommendations are provided concerning the use of noise prediction as an aid for noise control in workrooms. Examples of use of noise prediction methods are given in annexes A to E.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 17249.1-1998 Acoustics — Guidelines for the Design of Low-noise Workplaces — Noise Control Strategies

3 Terms and Definitions

For the purpose of this document, the terms and definitions defined in GB/T 17249.1-1998 apply.

4 Basic Principles of Sound Propagation in Rooms

4.1 Sound propagation descriptors

A basic element for noise prediction in workrooms is the prediction of the distribution of sound pressure levels caused by an omnidirectional point source.

This distribution is influenced by:

Foreword II
Introduction III
1 Scope
2 Normative References
3 Terms and Definitions
4 Basic Principles of Sound Propagation in Rooms
5 Noise Prediction in Workrooms
6 Methodology for Noise Prediction in Workrooms
7 Further Aspects of Noise Prediction.
Annex A (Informative) Three Case Studies Relating to Noise Prediction in Workrooms
Annex B (Informative) Prediction of the Noise Impact of New Machines in Existing Workrooms
Annex C (Informative) Determination of the Sound Pressure Level at the Workstation of a Machine in a Workroom
Annex D (Informative) Evaluation of the Acoustical Quality of a Workroom
Annex E (Informative) Recommendation for the Use of Noise Prediction Methods
Bibliography