GB/T 21228.2-2023 Active National standards

GB/T 21228.2-2023 Acoustics—Sound-scattering properties of surfaces—Part 2:Measurement of the directional diffusion coefficient in a free field

Publish Date: 2023-05-23 Implement Date: 2023-12-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 21228.2-2023

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Physics and mechanics

ICS Name: Building acoustics and sound insulation

Publish Date: 2023-05-23

Implement Date: 2023-12-01

Pages: 19 pages

Scope

This document describes a method for measuring the directional diffusion coefficient of a surface.
The diffusion coefficient describes the uniformity of the directional distribution of sound reflection on a surface, and is an indicator of the sound scattering characteristics of the surface. It is used to inform producers and users about the sound diffusion performance of the surface, and also provides information for developers and users of indoor acoustic prediction models. However, the diffusion coefficient is not suitable for being directly used as an input quantity in current diffusion algorithms in indoor geometric acoustic models.
This document also describes in detail the method for characterizing the sound diffusion characteristics of a surface in a free field.

Development Information

Word Count: 39 Thousand words Pages: 19 pages

Referenced Standards

ISO 266 IEC 61260

Adopt standards

ISO 17497-2:2012

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