Effects of speech processing strategy on Chinese tone recognition by Nucleus-24 cochlear implant users
Effects of speech processing strategy on Chinese tone recognition by Nucleus-24 cochlear implant users
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DOI：
10.1097/01.aud.0000145125.50433.19
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发表时间：
2004-10-01
期刊：
影响因子：
3.7
通讯作者：
Horng, MJ
中科院分区：
文献类型：
--
作者：
Fu, QJ;Hsu, CJ;Horng, MJ
目的：目的：探讨不同的语音处理策略对Nucleus-24人工耳蜗使用者汉语声调识别的影响。方法：对9名Nucleus-24人工耳蜗使用者分别采用频谱峰值（SPEAK）、高级组合编码器（ACE）和连续交错采样（CIS）策略进行汉语声调识别测试。中文句子的识别也用ACE策略（每个电极上每秒1200个脉冲）进行了测量。由于SPEAK处理器中的刺激速率固定为250脉冲/秒/电极（ppspe），因此仅使用SPEAK处理器测试了一种刺激速率。在ACE加工条件下测试了三种刺激速率（900、1200和1800 ppspe）。四个刺激率（1200，1800，2400，和3600 ppspe）进行了测试，在CIS处理条件。由于刺激电极的数量决定了CIS处理器的刺激速率，电极的数量从12到8减少到6到4，以实现1200，1800，2400，3600 pps.Results的刺激速率：结果显示，平均汉语声调识别分数与ACE和CIS策略显着高于与SPEAK策略。对于ACE策略，各种刺激速率之间的性能没有显著差异（对于ACE处理条件，刺激速率变化，同时保持刺激电极的数量恒定）。对于CIS策略，在各种刺激速率和电极配置之间没有显著差异（对于CIS处理条件，通过改变刺激电极的数量来改变刺激速率）。汉语声调识别和日常句子的识别之间也有显着的相关性。结论：最新一代的语音处理策略能够为人工耳蜗植入者提供相当数量的声调信息。然而，汉语声调识别显著地受到语音处理策略选择的影响。相对较高的刺激率（>900 ppspe）可能会改善汉语声调识别。此外，可能有必要开发语音处理策略，以专门提高音调识别，这对于理解音调语言至关重要。
Objective: To evaluate the effects of speech processing strategy on Chinese tone recognition by Nucleus-24 cochlear implant users.Methods: Recognition of Chinese tones was measured with the spectral peak (SPEAK), advanced combination encoders (ACE), and continuous interleaved sampling (CIS) strategies in nine Nucleus-24 cochlear implant users. Recognition of Chinese sentences was also measured with the ACE strategy (1200 pulse-per-sec on each electrode). As the stimulation rate in the SPEAK processor is fixed at 250 pulses per sec per electrode (ppspe), only one stimulation rate was tested with the SPEAK processor. Three stimulation rates (900, 1200, and 1800 ppspe) were tested in the ACE processing conditions. Four stimulation rates (1200, 1800, 2400, and 3600 ppspe) were tested in the CIS processing conditions. Because the number of stimulating electrodes determines the stimulation rate in CIS processors, the number of electrodes was reduced from 12 to 8 to 6 to 4 to achieve stimulation rates of 1200, 1800, 2400, to 3600 pps.Results: Results showed that mean Chinese tone recognition scores with the ACE and CIS strategies were significantly higher than those with the SPEAK strategy. For the ACE strategy, there was no significant difference in performance among the various stimulation rates (for the ACE processing conditions, the stimulation rate was varied while keeping the number of stimulating electrodes constant). For the CIS strategy, there was no significant difference among the various stimulation rates and electrode configurations (for the CIS processing conditions, the stimulation rate was varied by changing the number of stimulating electrodes). There was also a significant correlation between Chinese tone recognition and the recognition of everyday sentences.Conclusions: The latest-generation speech processing strategies were able to provide cochlear implant users with considerable amounts of tonal information. However, Chinese tone recognition was significantly affected by the choice in speech processing strategy. Relatively higher stimulation rates (>900 ppspe) may improve Chinese tone recognition. Furthermore, it may be necessary to develop speech processing strategies to specifically improve tone recognition, which is critical for understanding tonal languages.