Mechergui Nader, Djaziri-Larbi Sonia, Jaïdane Mériem
Université Tunis El Manar, Ecole Nationale d'Ingénieurs de Tunis, Signals and Systems Lab, Tunis, Tunisia.
J Acoust Soc Am. 2017 Mar;141(3):1470. doi: 10.1121/1.4976628.
A method to measure the speech intelligibility in public address systems for normal hearing and hearing impaired persons is presented. The proposed metric is an extension of the speech based Speech Transmission Index to account for accurate perceptual masking and variable hearing ability: The sound excitation pattern generated at the ear is accurately computed using an auditory filter model, and its shapes depend on frequency, sound level, and hearing impairment. This extension yields a better prediction of the intensity of auditory masking which is used to rectify the modulation transfer function and thus to objectively assess the speech intelligibility experienced by hearing impaired as well as by normal hearing persons in public spaces. The proposed metric was developed within the framework of the European Active and Assisted Living research program, and was labeled "SB-STI for All." Extensive subjective in-Lab and in vivo tests have been conducted and the proposed metric proved to have a good correlation with subjective intelligibility scores.
提出了一种测量公共广播系统中正常听力和听力受损者语音清晰度的方法。所提出的指标是基于语音的语音传输指数的扩展，以考虑精确的感知掩蔽和可变的听力能力：使用听觉滤波器模型精确计算耳朵处产生的声音激励模式，其形状取决于频率、声级和听力损伤。这种扩展能够更好地预测听觉掩蔽强度，该强度用于校正调制传递函数，从而客观评估听力受损者以及正常听力者在公共场所所体验到的语音清晰度。所提出的指标是在欧洲主动和辅助生活研究项目的框架内开发的，并被标记为“通用的SB-STI”。已经进行了广泛的实验室主观测试和现场测试，结果证明所提出的指标与主观清晰度得分具有良好的相关性。
