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  • BSI
    BS ISO 23351-1:2020 Acoustics. Measurement of speech level reduction of furniture ensembles and enclosures - Laboratory method
    Edition: 2020
    $411.69
    / user per year

Description of BS ISO 23351-1:2020 2020

This document specifies a laboratory method to facilitate the comparison of furniture ensembles and enclosures with respect to their ability to reduce the speech level of the occupant speaking inside the product.

In this method, the sound power level is measured in two scenarios: 1) without the product, and 2) with the product. During scenario 1), the test signal is produced by the sound source in an empty room while the product is absent. During scenario 2), the test signal is produced by the sound source inside the product in the occupant’s position. Level reduction is the difference of the sound power levels measured in the two scenarios in 1/1-octave frequency bands from 125 Hz to 8 000 Hz. Speech level reduction is a single-number quantity that expresses the corresponding reduction in A-weighted sound power level of standard speech within the entire frequency range from 125 Hz to 8 000 Hz.

The method is applicable for entire furniture ensembles or enclosures, which form a unity that serves one or several occupants, and which are also used to provide improved speech privacy.

This method is not intended for single components used in workstations, such as a screen, a storage unit, a table, a luminaire, a cupboard, a bookshelf, a standard chair, a wall absorber or a ceiling absorber.



Standard NumberBS ISO 23351-1:2020
TitleAcoustics. Measurement of speech level reduction of furniture ensembles and enclosures - Laboratory method
StatusDefinitive
Publication Date2020-07-03
Identical National Standard OfISO 23351
DescriptorsAcoustics, Measurement, Speech, Furniture, Enclosures
ICS91.120.20 Acoustics in building. Sound insulation
CommitteeEH/1/6
ISBN978 0 539 00767 1
PublisherBSI
Pages24

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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