The effects of hearing loss and age on the benefit of spatial separation between multiple talkers in reverberant rooms
The effects of hearing loss and age on the benefit of spatial separation between multiple talkers in reverberant rooms
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DOI：
10.1121/1.2980441
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发表时间：
2008-11-01
影响因子：
2.4
通讯作者：
Kidd, Gerald, Jr.
中科院分区：
文献类型：
--
作者：
Marrone, Nicole;Mason, Christine R.;Kidd, Gerald, Jr.
本研究探讨了听力损失、混响和年龄对空间隔离多掩蔽说话者和目标说话者的好处的相互作用。根据听力状况和年龄对四组听众进行了测试。在每一次试验中，听众都听到不同的女性说话者同时说出三句不同的句子。听众报告目标句子中的关键词，目标句子出现在一个固定的、已知的位置。蒙面者与目标放在一起，或者通过空间分离和对称放置的扬声器呈现，创造了一种不简单的“更好的耳朵”的情况。混响也多种多样。通过调整掩蔽器的水平，测量了识别固定水平目标的阈值下目标与掩蔽器的比值。平均而言，听力损失的听众比听力正常的听众表现出更少的空间释放。年龄是一个重要的因素，尽管不同年龄组的听力敏感度的微小差异可能是造成这种影响的原因。在更多混响的房间条件下，空间释放减少，但在大多数情况下，显著的优势仍然存在。这些结果为在多语者的情况下空间分离的巨大好处提供了证据，这可能是由于感知因素。然而，听力损失和混响大大降低了这种好处。(C) 2008美国声学学会。(DOI: 10.1121/1.2980441)
This study investigated the interaction between hearing loss, reverberation, and age on the benefit of spatially separating multiple masking talkers from a target talker. Four listener groups were tested based on hearing status and age. On every trial listeners heard three different sentences spoken simultaneously by different female talkers. Listeners reported keywords from the target sentence, which was presented at a fixed and known location. Maskers were colocated with the target or presented from spatially separated and symmetrically placed loudspeakers, creating a situation with no simple "better-ear." Reverberation was also varied. The target-to-masker ratio at threshold for identification of the fixed-level target was measured by adapting the level of the maskers. On average, listeners with hearing loss showed less spatial release from masking than normal-hearing listeners. Age was a significant factor although small differences in hearing sensitivity across age groups may have contributed to this effect. Spatial release was reduced in the more reverberant room condition but in most cases a significant advantage remained. These results provide evidence for a large benefit of spatial separation in a multitalker situation that is likely due to perceptual factors. However, this benefit is significantly reduced by both hearing loss and reverberation. (C) 2008 Acoustical Society of America. [DOI: 10.1121/1.2980441]