Department of Engineering, University of Ferrara, Via Saragat, 1 - 44122 Ferrara, Italy.
J Acoust Soc Am. 2022 May;151(5):3522. doi: 10.1121/10.0011403.
Changing the balance between the early and late reflections in the impulse response affects the clarity of speech, and also the spatial perception of the sound source is affected when the direction of the early reflections is manipulated. While the effect of noise on early reflections has long been investigated in speech intelligibility studies, it is unclear whether and how the spatial characteristics of the source are altered by noise, and whether this would influence speech intelligibility in any way. The aim of the present work was to analyze the spatial perception of a speech source in noise and its relationship, if any, with speech intelligibility. Impulse responses with specular or scattered early reflections and two different reverberant tails were used to create sound fields with controlled clarity and reverberation. It emerged that noise affects spatial cues compared to the reverberation-only (quiet) condition; ratings are consequently changed, and most percepts are distorted. Speech intelligibility is also sensitive to changes in acoustic variables and the type of reflection, but the direct association between spatial percepts and speech intelligibility is weak.
改变脉冲响应中早期和晚期反射之间的平衡会影响语音的清晰度，并且当早期反射的方向发生变化时，声源的空间感知也会受到影响。虽然噪声对早期反射的影响在语音可懂度研究中早已得到研究，但目前尚不清楚噪声是否以及如何改变声源的空间特征，以及这是否会以任何方式影响语音可懂度。本工作的目的是分析噪声中的语音源的空间感知及其与语音可懂度的关系。使用镜面或散射的早期反射和两个不同的混响尾迹来创建具有受控清晰度和混响的声场。结果表明，与仅混响（安静）条件相比，噪声会影响空间线索；因此，评分会发生变化，并且大多数感知会失真。语音可懂度也对声学变量和反射类型的变化敏感，但空间感知与语音可懂度之间的直接关联较弱。
