Impact of noise source configuration on directional hearing aid benefit and performance
Impact of noise source configuration on directional hearing aid benefit and performance
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DOI：
10.1097/00003446-200006000-00002
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发表时间：
2000-06-01
期刊：
影响因子：
3.7
通讯作者：
Ricketts, T
中科院分区：
文献类型：
--
作者：
Ricketts, T
目的：为了评估噪声源的位置和混响对三种市售定向助听器的定向效益和性能的影响，设计：在两个不同的混响室中测量四种不同配置的竞争噪声源的定向效益和性能。三对助听器代表三个商业模式，选择电声评价的方向性的基础上。定向效益和性能的25名对称，倾斜，感音神经性听力损失的受试者在所有的测试环境中使用修改后的版本的听力噪声Test.Results：混响和配置的竞争噪声源（S）显着影响定向效益和性能。定向效益与定向绩效之间不存在显著相关。助听器品牌的效益和性能顺序（从最好到最差）取决于噪声源配置，结论：数据显示，混响增加显著降低定向效益和性能。助听器品牌的绝对和相对（等级排序）定向效益和性能因噪声源配置而异。这些结果表明，在传统测试环境中收集的数据（例如，放置在180度方位角处的单个竞争噪声）不能用于在大多数其它测试和真实世界环境中准确地预测定向益处或性能。混响和噪声源配置对定向益处/性能的影响可以通过噪声源的空间特性与助听器的极性方向性模式之间的相互作用来很好地解释。
Objective: To evaluate the impact of the position of noise source(s) and reverberation on the directional benefit and performance of three commercially available directional hearing aids.Design: Directional benefit and performance were measured for four different configurations of competing noise source(s) in two different reverberant rooms. Three pairs of hearing aids representing three commercial models were selected based on electroacoustic evaluation of directivity. Directional benefit and performance of 25 subjects with symmetrical, sloping, sensorineural hearing loss were measured in all test environments using a modified version of the Hearing in Noise Test.Results: Both reverberation and configuration of the competing noise source(s) significantly affected directional benefit and performance. There was no significant correlation between directional benefit and directional performance. The order of benefit and performance across hearing aid brands (from best to worst) varied depending on the noise source configuration,Conclusions: Data revealed increasing reverberation significantly decreased directional benefit and performance. The absolute and relative (rank ordering) directional benefit and performance varied across hearing aid brand, with noise source configuration. These results suggest that data collected in traditional test environments (e.g., a single competing noise placed at 180 degrees azimuth) cannot be used to accurately predict directional benefit or performance in the majority of other test and real-world environments. The impact of reverberation and noise source configuration on directional benefit/performance can be explained fairly well by the interaction between the spatial properties of the noise source(s) and the polar directivity patterns of the hearing aids.