影响高强度级语音可懂度的因素。

Factors affecting the intelligibility of high-intensity-level-based speech.

机构信息

Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen,

College of Electronics and Information Engineering, Sichuan University, Chengdu,

出版信息

J Acoust Soc Am. 2019 Aug;146(2):EL151. doi: 10.1121/1.5122190.

DOI:10.1121/1.5122190

PMID:31472534

Abstract

The present work examined factors affecting the intelligibility of high-intensity-level-based speech. Mandarin sentences were processed to contain only high-intensity segments confined by a 5-dB selected intensity range (SIR), with other segments replaced by noise. The processed stimuli were presented to normal-hearing listeners to recognize. The greatest intensity density occurred in the SIR with an upper boundary 3 dB below the peak intensity level, and this SIR yielded the highest intelligibility score in quiet. The SIR with the upper boundary at the peak intensity level yielded better intelligibility performance under noisy conditions, due largely to the relatively high effective signal-to-noise ratio.

摘要

本研究考察了影响高强度级基础语音可懂度的因素。普通话句子经处理后仅包含高强度段，这些高强度段被限定在 5dB 选择强度范围内（SIR），其他部分则用噪声替代。经处理后的刺激呈现给正常听力的听众进行识别。最大的强度密度出现在 SIR 中，其上限比峰值强度低 3dB，在安静环境中，这个 SIR 产生了最高的可懂度得分。在噪声环境下，SIR 的上限处于峰值强度水平时，可懂度表现更好，这主要归因于相对较高的有效信噪比。