Fast processing models effects of reflections on binaural unmasking

IF 1 3区 物理与天体物理 Q4 ACOUSTICS Acta Acustica Pub Date : 2023-01-01 DOI:10.1051/aacus/2023005
Norbert F. Bischof, Pierre G Aublin, B. Seeber
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引用次数: 4

Abstract

Sound reflections and late reverberation alter energetic and binaural cues of a target source, thereby affecting its detection in noise. Two experiments investigated detection of harmonic complex tones, centered around 500 Hz, in noise, in a virtual room with different modifications of simulated room impulse responses (RIRs). Stimuli were auralized using the Simulated Open Field Environment’s (SOFE’s) loudspeakers in anechoic space. The target was presented from the front (0°) or 60° azimuth, while an anechoic noise masker was simultaneously presented at 0°. In the first experiment, early reflections were progressively added to the RIR and detection thresholds of the reverberant target were measured. For a frontal sound source, detection thresholds decreased while adding early reflections within the first 45 ms, whereas for a lateral sound source, thresholds remained constant. In the second experiment, early reflections were removed while late reflections were kept along with the direct sound. Results for a target at 0° show that even reflections as late as 150 ms reduce detection thresholds compared to only the direct sound. A binaural model with a sluggishness component following the computation of binaural unmasking in short windows predicts measured and literature results better than when large windows are used.
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快速处理模型对反射对双耳掩模的影响
声反射和晚混响改变了目标源的能量和双耳线索,从而影响其在噪声中的检测。两个实验研究了在模拟房间脉冲响应(RIRs)的不同修改下,在虚拟房间中对噪声中以500 Hz为中心的谐波复音的检测。在消声空间中使用模拟开放环境(SOFE)扬声器对刺激进行听觉化。目标在0°或60°方位角处呈现,同时在0°处呈现消声噪声掩蔽器。在第一个实验中,将早期反射累加到RIR中,测量混响目标的检测阈值。对于正面声源,在前45毫秒内增加早期反射时,检测阈值降低,而对于侧向声源,阈值保持不变。在第二个实验中,早期反射被去除,而晚期反射与直接声音一起被保留。0°目标的结果表明,即使是150毫秒的反射声也比直接声降低了检测阈值。在短窗口下计算双耳去掩模后,一个带有滞后分量的双耳模型比使用大窗口时更好地预测了测量和文献结果。
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来源期刊
Acta Acustica
Acta Acustica ACOUSTICS-
CiteScore
2.80
自引率
21.40%
发文量
0
审稿时长
12 weeks
期刊介绍: Acta Acustica, the Journal of the European Acoustics Association (EAA). After the publication of its Journal Acta Acustica from 1993 to 1995, the EAA published Acta Acustica united with Acustica from 1996 to 2019. From 2020, the EAA decided to publish a journal in full Open Access. See Article Processing charges. Acta Acustica reports on original scientific research in acoustics and on engineering applications. The journal considers review papers, scientific papers, technical and applied papers, short communications, letters to the editor. From time to time, special issues and review articles are also published. For book reviews or doctoral thesis abstracts, please contact the Editor in Chief.
期刊最新文献
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