GB/T 19889.2-2022 in English
VALIDAcoustics—Measurement of sound insulation in buildings and of building elements—Part 2 : Determination and application of measurement uncertainties
- Issued on:2022-03-09
- Implemented on:2022-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$330.00
《GB/T 19889.2-2022声学 建筑和建筑构件隔声测量 第2部分：测量不确定度评定和应用》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。
Introduction
Analysis of GB/T 19889.2-2020 core technical requirements
I. Background of standard formulation
Building sound insulation laboratory has maintained an average annual growth of 8% in testing demand since the implementation of the 2005 version of the standard. The revised version incorporates the requirements of ISO 12999-1:2019 international standard and adds a 50-5000Hz wide frequency band evaluation system.
II. Comparison of core evaluation methods
| Evaluation method | Application scenario | Expanded uncertainty |
|---|---|---|
| GUM modeling | Precision laboratory testing (such as window component univariate analysis) | 0.48dB |
| Inter-laboratory comparison | Field measurement (such as building exterior wall verification) | 1.2-2.6dB |
III. Single Value Evaluation Practice
For the weighted sound insulation RW indicator:
- α coefficient probability analysis: Lightweight partition wall recommends using 95% one-sided confidence factor k=1.65
- State B control process: When verifying the sound insulation windows of thermal power plants on site, σsitu is not greater than 0.9dB
U = k·u (k=2 contains probability ≈95%)
IV. Key Technology Evolution
Compared with the 2005 version:
- Added an in-situ test compensation correction algorithm
- Introduced a three-dimensional spatial equilibrium model for impact sound correction
- Unified the accounting standards for six categories of single-value quantities
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