Using transposition to improve consonant discrimination and detection for listeners with severe high-frequency hearing loss
Using transposition to improve consonant discrimination and detection for listeners with severe high-frequency hearing loss
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DOI：
10.1080/14992020601188591
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发表时间：
2007-06-01
影响因子：
2.7
通讯作者：
Moore, Brian C. J.
中科院分区：
文献类型：
--
作者：
Robinson, Joanna D.;Baer, Thomas;Moore, Brian C. J.
高频信息到低频的转换可以帮助患有与“死区”（DR）相关的高频听力损失的人检测和识别某些辅音，如“s”。在这种情况下，常规的高频放大通常是无益的。我们设计和评估了一个新的tiansposition算法，这是适应每个主题的高频DR。频率分量以及DR内被转置到DR内，而不应用频率压缩。低频成分被放大，但不受转座。只有当有显著的高频能量时才发生移位，防止中等水平的高频背景噪声被移位。辅音的歧视进行了测试，使用元音-辅音元音（VCV）的刺激，和检测单词的最后's'和'z'进行了评估，使用单词对。七名受试者与高频DR进行了测试，在安静的使用换位和控制条件。转座后，两名受试者明显改善，没有表现出显着恶化的VCV测试整体。塞擦音的感觉持续改善。平均受试者，检测单词的最后's'和'z'显着改善，与五个主题显着改善个别。
Transposition of high-frequency information to lower frequencies may help people with high-frequency hearing loss associated with a 'dead region' (DR) to detect and identify certain consonants, such as 's'. Conventional high-frequency amplification is often not beneficial in such cases. We designed and evaluated a new tiansposition algorithm which was adapted to each subject's highfrequency DR. Frequency components from well within the DR were transposed to just within the DR without applying frequency compression. Low-frequency components were amplified, but unaffected by transposition. Transposition only occurred ifthere was significant highfrequency energy, preventing high-frequency background noise of moderate level from being transposed. Consonant discrimination was tested using vowel-consonantvowel (VCV) stimuli, and the detection of word-final 's' and 'z' was assessed using word pairs. Seven subjects with high-frequency DRs were tested in quiet using a transposed and a control condition. Following transposition, two subjects improved significantly and none performed significantly worse on the VCV-test overall. The peiception of affricates was consistently improved. Averaged across Subjects, the detection of word-final 's' and 'z' was significantly improved, with five subjects improving significantly individually.