A cocktail party model of spatial release from masking by both noise and speech interferers
A cocktail party model of spatial release from masking by both noise and speech interferers
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DOI：
10.1121/1.3613928
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发表时间：
2011-09-01
影响因子：
2.4
通讯作者：
Litovsky, Ruth Y.
中科院分区：
文献类型：
--
作者：
Jones, Gary L.;Litovsky, Ruth Y.
一个数学公式估计空间释放掩蔽（SRM）在鸡尾酒会环境中将是有用的，作为一个更简单的替代计算密集型算法，并可能提高对潜在机制的理解。本文所述的实验旨在提供对将SRM分为不对称性和角分离贡献的模型的强有力测试[Bronkhorst（2000）。Acustica 86，117-128]，并检查该模型是否可以扩展到包括语音掩蔽。跨掩蔽物类型的贡献SRM的掩蔽物从目标的角分离被发现以递减的速度增长，作为角分离额hemifield内增加，相反的模型的预测。语音掩蔽不同噪声掩蔽的SRM的整体幅度和角分离的贡献（都更大的语音）。这些结果被用来开发一个修改后的模型，实现了良好的拟合噪声掩蔽（ρ = 0.93）和语音掩蔽（ρ = 0.94）的数据，同时使用相同的功能来描述分离和不对称成分的SRM两个掩蔽类型。这些研究结果表明，这种方法可以用来准确地建模SRM的语音掩蔽除了主要是“精力充沛”的噪声掩蔽。(C)2011年美国声学学会。[DOI：10.1121/1.3613928]
A mathematical formula for estimating spatial release from masking (SRM) in a cocktail party environment would be useful as a simpler alternative to computationally intensive algorithms and may enhance understanding of underlying mechanisms. The experiment presented herein was designed to provide a strong test of a model that divides SRM into contributions of asymmetry and angular separation [Bronkhorst (2000). Acustica 86, 117-128] and to examine whether that model can be extended to include speech maskers. Across masker types the contribution to SRM of angular separation of maskers from the target was found to grow at a diminishing rate as angular separation increased within the frontal hemifield, contrary to predictions of the model. Speech maskers differed from noise maskers in the overall magnitude of SRM and in the contribution of angular separation (both greater for speech). These results were used to develop a modified model that achieved good fits to data for noise maskers (rho = 0.93) and for speech maskers (rho = 0.94) while using the same functions to describe separation and asymmetry components of SRM for both masker types. These findings suggest that this approach can be used to accurately model SRM for speech maskers in addition to primarily "energetic" noise maskers. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3613928]