标准摘要
[中文适用范围]： 本文件规定了一种实验室方法，以方便比较家具整体和外壳降低产品内使用者说话音量的能力。 在此方法中，在两种情况下测量声功率级：1) 没有产品，2) 有产品。 在场景 1) 中，测试信号是在空房间中、产品不存在时由声源产生的。 在场景 2) 中，测试信号由产品内部位于乘员位置的声源产生。 声级降低是在 125 Hz 至 8000 Hz 的 1/1 倍频程频带内两种情况下测得的声功率级之差。 语音电平降低是一个单数量，表示在 125 Hz 至 8000 Hz 整个频率范围内标准语音 A 计权声功率电平的相应降低。 该方法适用于整个家具整体或外壳，它们形成为一个或多个居住者服务的整体，并且还用于提供改进的语音隐私。 此方法不适用于工作站中使用的单个组件，例如屏幕、存储单元、桌子、灯具、橱柜、书架、标准椅子、墙壁吸收器或天花板吸收器。 [外文原描述]： 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.
英文名称Acoustics — Measurement of speech level reduction of furniture ensembles and enclosures — Part 1: Laboratory method