The influence of non-spatial factors on measures of spatial release from masking
The influence of non-spatial factors on measures of spatial release from masking
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DOI：
10.1121/1.3693656
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发表时间：
2012-04-01
影响因子：
2.4
通讯作者：
Kidd, Gerald, Jr.
中科院分区：
文献类型：
--
作者：
Best, Virginia;Marrone, Nicole;Kidd, Gerald, Jr.
本研究测试的假设，减少空间释放掩蔽（SRM）造成的感音神经性听力损失的竞争语音混合物的干扰语音的特性的影响。一个正面的语音目标，同时提出了两个可理解的或两个时间反转（不可理解的）语音掩蔽，要么与目标共置或对称地从目标分离在水平面上。听力障碍的听众和听力正常的听众之间的SRM的差异是大得多的前掩蔽（赤字5.8分贝）比反向掩蔽（赤字1.6分贝）。这是因为所有的听众，无论听力能力如何，在与可理解的掩蔽者共处的条件下表现相似（而且很差）。同样的条件，然后测试听力正常的听众使用耳机刺激，降低了噪声声码。减少可用的频谱通道的数量系统地减少了测量的SRM，并再次，更多的是前向（减少3.8分贝）比反向语音掩蔽（减少1.8分贝）。结果表明，非空间因素可以强烈影响的SRM的大小和明显的缺陷，在SRM听力受损的听众。(C)2012年美国声学学会。[http：//dx.doi.org/10.1121/1.3693656]
This study tested the hypothesis that the reduction in spatial release from masking (SRM) resulting from sensorineural hearing loss in competing speech mixtures is influenced by the characteristics of the interfering speech. A frontal speech target was presented simultaneously with two intelligible or two time-reversed (unintelligible) speech maskers that were either colocated with the target or were symmetrically separated from the target in the horizontal plane. The difference in SRM between listeners with hearing impairment and listeners with normal hearing was substantially larger for the forward maskers (deficit of 5.8 dB) than for the reversed maskers (deficit of 1.6 dB). This was driven by the fact that all listeners, regardless of hearing abilities, performed similarly (and poorly) in the colocated condition with intelligible maskers. The same conditions were then tested in listeners with normal hearing using headphone stimuli that were degraded by noise vocoding. Reducing the number of available spectral channels systematically reduced the measured SRM, and again, more so for forward (reduction of 3.8 dB) than for reversed speech maskers (reduction of 1.8 dB). The results suggest that non-spatial factors can strongly influence both the magnitude of SRM and the apparent deficit in SRM for listeners with impaired hearing. (C) 2012 Acoustical Society of America. [http://dx.doi.org/10.1121/1.3693656]