Spectral Weighting of Monaural Cues for Auditory Localization in Sagittal Planes.

IF 3 2区 医学 Q1 AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGY
Trends in Hearing Pub Date : 2025-01-01 Epub Date: 2025-03-18 DOI:10.1177/23312165251317027
Pedro Lladó, Piotr Majdak, Roberto Barumerli, Robert Baumgartner
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Abstract

Localization of sound sources in sagittal planes significantly relies on monaural spectral cues. These cues are primarily derived from the direction-specific filtering of the pinnae. The contribution of specific frequency regions to the cue evaluation has not been fully clarified. To this end, we analyzed how different spectral weighting schemes contribute to the explanatory power of a sagittal-plane localization model in response to wideband, flat-spectrum stimuli. Each weighting scheme emphasized the contribution of spectral cues within well-defined frequency bands, enabling us to assess their impact on the predictions of individual patterns of localization responses. By means of Bayesian model selection, we compared five model variants representing various spectral weights. Our results indicate a preference for the weighting schemes emphasizing the contribution of frequencies above 8 kHz, suggesting that, in the auditory system, spectral cue evaluation is upweighted in that frequency region. While various potential explanations are discussed, we conclude that special attention should be put on this high-frequency region in spatial-audio applications aiming at the best localization performance.

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矢状面听觉定位的单耳信号频谱加权。
声源在矢状面上的定位很大程度上依赖于单声谱线索。这些线索主要来源于耳廓的定向过滤。特定频率区域对线索评估的贡献尚未得到充分澄清。为此,我们分析了不同的谱加权方案对矢状面定位模型在响应宽带、平谱刺激时的解释力的影响。每个加权方案都强调了在定义明确的频带内的频谱线索的贡献,使我们能够评估它们对定位响应个体模式预测的影响。通过贝叶斯模型选择,我们比较了代表不同谱权的五种模型变量。我们的研究结果表明,人们更倾向于强调8 kHz以上频率的权重方案,这表明,在听觉系统中,频谱提示评估在该频率区域的权重更高。虽然讨论了各种可能的解释,但我们得出结论,在空间音频应用中,为了获得最佳定位性能,应该特别注意这个高频区域。
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来源期刊
Trends in Hearing
Trends in Hearing AUDIOLOGY & SPEECH-LANGUAGE PATHOLOGYOTORH-OTORHINOLARYNGOLOGY
CiteScore
4.50
自引率
11.10%
发文量
44
审稿时长
12 weeks
期刊介绍: Trends in Hearing is an open access journal completely dedicated to publishing original research and reviews focusing on human hearing, hearing loss, hearing aids, auditory implants, and aural rehabilitation. Under its former name, Trends in Amplification, the journal established itself as a forum for concise explorations of all areas of translational hearing research by leaders in the field. Trends in Hearing has now expanded its focus to include original research articles, with the goal of becoming the premier venue for research related to human hearing and hearing loss.
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