Benefit from spatial separation of multiple talkers in bilateral hearing-aid users: Effects of hearing loss, age, and cognition
Benefit from spatial separation of multiple talkers in bilateral hearing-aid users: Effects of hearing loss, age, and cognition
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DOI：
10.3109/14992020903079332
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发表时间：
2009-01-01
影响因子：
2.7
通讯作者：
van Schaik, Andre
中科院分区：
文献类型：
--
作者：
Neher, Tobias;Behrens, Thomas;van Schaik, Andre
为了研究双侧助听器使用者在多人讲话情况下的空间听力能力，20 名受试者接受了配置为保留空间听力显着声学线索的配件。适应环境后，测量了三个相互竞争的说话者的语音接收阈值（SRT），这些说话者要么位于同一位置，要么沿着前后或左右维度在空间上分开。此外，还测量了受试者的工作记忆和注意力能力。左右 SRT 变化超过 14 dB，而前后 SRT 变化超过 8 dB。此外，左右 SRT、年龄和低频听力损失之间以及前后 SRT、年龄和高频辅助阈值之间也观察到显着相关性。就认知效果而言，左右表现与注意力能力密切相关，而前后表现则与工作记忆能力相关。总而言之，这些结果表明，由于听力阈值的提高和年龄的增长，助听器用户减少了对耳间和单耳空间线索的获取，并且通过自上而下的处理“增强”目标信号的能力减弱。这些缺陷反过来会导致复杂聆听环境中的功能受损。
To study the spatial hearing abilities of bilateral hearingaid users in multi-talker situations, 20 subjects received fittings configured to preserve acoustic cues salient for spatial hearing. Following acclimatization, speech reception thresholds (SRTs) were measured for three competing talkers that were either co-located or spatially separated along the front-back or leftright dimension. In addition, the subjects' working memory and attentional abilities were measured. Left-right SRTs varied over more than 14 dB, while front-back SRTs varied over more than 8 dB. Furthermore, significant correlations were observed between left-right SRTs, age, and low-frequency hearing loss, and also between front-back SRTs, age, and high-frequency aided thresholds. Concerning cognitive effects, leftright performance was most strongly related to attentional abilities, while front-back performance showed a relation to working memory abilities. Altogether, these results suggest that, due to raised hearing thresholds and aging, hearingaid users have reduced access to interaural and monaural spatial cues as well as a diminished ability to 'enhance' a target signal by means of top-down processing. These deficits, in turn, lead to impaired functioning in complex listening environments.