1.1该分类提供了一个数字评级，可用于比较建筑系统和子系统，以实现语音隐私。评级旨在与办公室之间传输的语音智能相关联。 1.2涉及女性说话者或儿童、英语以外的语言和语音以外的声谱的应用不在本分类范围内。因此，例如，建筑系统或子系统在减少机械、工业过程、保龄球道、音乐室、娱乐场所等传递的噪声方面的有效性的比较将被排除在外。 皮尔逊等人发表的研究可能最终会放宽对女性演讲者的限制。 ====意义和用途====== 表中给出的每个加权因子 1. 表示相关三分之一倍频程频带内包含的整体语音智能的分数。 表中的权重因子 1. 通过将ANSI S3.5-1969中每个单独的三分之一倍频程加权因子乘以300得到。因此，清晰度等级（AC）值与清晰度指数（AI）值相关，但明显不同。特别是，交流仅考虑信号衰减的影响；而人工智能考虑了语音电平和频谱以及背景声级和频谱等附加因素。 笔记 2-AC类似于Warnock提出的DAI额定值 6. 并且已经证明与ANSI S3.5中得出的AI值相关，除非AI接近1或0（AI值范围在1到0之间，接近0，隐私性和非智能性增加）。铰接类值则相反。它们通常超过100，并随着隐私和非智能性的增加而增加。交流额定值和开放式语音隐私的主观判断之间的广泛比较尚未完成。

1.1 This classification provides a single figure rating that can be used for comparing building systems and subsystems for speech privacy purposes. The rating is designed to correlate with transmitted speech intelligence between office spaces. 1.2 Excluded from the scope of this classification are applications involving female speakers or children, languages other than English, and sound spectra other than speech. Thus excluded, for example, would be comparisons of building systems or subsystems for their effectiveness in reducing transmitted noise from machinery, industrial processes, bowling alleys, music rooms, places of entertainment, and the like. Published work by Pearsons, et al, may eventually permit the restriction on female speakers to be relaxed. ====== Significance And Use ====== Each weighting factor given in Table 1 represents the fraction of overall speech intelligence contained within the associated one-third octave frequency band. The weighting factors in Table 1 are obtained by multiplying each individual one-third octave band weighting factor of ANSI S3.5-1969 by 300. Articulation class (AC) values are thus related to but distinctly different from articulation index (AI) values. In particular, the AC considers only the effect of signal attenuation; while the AI considers such additional factors as speech level and spectrum and background sound level and spectrum. Note 2—The AC is similar to the DAI rating proposed by Warnock 6 and has been shown to correlate with AI values derived from ANSI S3.5, except where the AI approaches 1 or 0 (AI values range between 1 and 0 and approach 0 with increasing privacy and nonintelligibility). Articulation class values give the reverse. They usually exceed 100 and increase with increasing privacy and nonintelligibility. Extensive comparison between AC ratings and subjective judgments of open-plan speech privacy has not yet been accomplished.