音响系统设备.第16部分:语言传输系统的言语可懂度的客观评比

[中文适用范围]： 本部分IEC 60268规定了评估语音传输质量与可懂度的客观方法。本标准旨在为音频、通信和声学领域所有类型的STI方法用户提供全面的手册。本标准不提供用于传输通道认证的STI标准（例如语音报警系统的标准）。介绍了三种密切相关的方法，称为STI、STIPA和STITEL。前两种方法用于评估有无音响系统的语音传输性能。STITEL方法的使用范围更有限。 注：这些方法均不适用于测量和评估语音隐私和语音掩蔽系统，因为STI尚未在代表语音隐私应用的情况下进行验证[1]。 包含以下信息： • 测量技术； • 预测技术。 [外文原描述]： IEC 60268-16:2011 specifies objective methods for rating the transmission quality of speech with respect to intelligibility. It provides a comprehensive manual for all types of users of the STI method in the fields of audio, communications and acoustics. Three methods are presented, which are closely related and are referred to as STI, STIPA, and STITEL. The first two methods are intended for rating speech transmission performance with or without sound systems. The STITEL method has more restricted uses. This fourth edition cancels and replaces the third edition, published in 2003, and constitutes a technical revision. It includes the following significant technical changes with respect to the previous edition: - development of more comprehensive, complete and unambiguous standardization of the STI methodology; - the term STIr is discontinued. A new function for the prediction of auditory masking effects is introduced; - the concept of 'speech level' and the setting of the level of the test signal have been introduced; - additional information has been included on prediction and measurement procedures. The French version of this standard has not been voted upon.