标准编号：ISO 23351-1:2020
中文名称：声学 家具整体和外壳的语音电平降低的测量 第1部分：实验室方法
英文名称：Acoustics — Measurement of speech level reduction of furniture ensembles and enclosures — Part 1: Laboratory method
发布日期：2020-06
标准范围
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.
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