Acoustics. Sound-scattering properties of surfaces - Measurement of the directional diffusion coefficient in a free field1 Scope This part of ISO 17497 specifies a method of measuring the directional diffusion coefficient of surfaces. The diffusion coefficient characterizes the sound reflected from a surface in terms of the uniformity of the reflected polar distribution. The diffusion coefficient is a measure of quality designed to inform producers and users of surfaces that, either deliberately or accidentally, diffuse sound. It can also inform developers and users of

colour of light

BS EN 1998-1:2004 relates to the structural design of buildings

be in industry

and are used for the application of sleep apnoea breathing therapy

Omission from the scope of fire-fighting and welding applications

Calculation of second and higher-order PMD

This European Standard covers accessible goods only lifts with rated load exceeding 300 kg and not intended to move persons

but they are not addressed by this standard as they are not formal requirement verification activities in the sense of the customersupplier relationship

it may be specified by the seat manufacturer

This part of ISO/IEC 10536 shall be used in conjunction with later parts of ISO/IEC 10536

Laboratory instruments manufacturers/suppliers

The requirements of ISO 22870 can be applied when POCT is carried out in a hospital