Study of time-sequential signal processing of auditory nerves using a cochlear implant

使用人工耳蜗的听觉神经时序信号处理研究

基本信息

批准号：
04455001
负责人：
IFUKUBE Tohru
金额：
$ 4.67万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04455001/
关键词：
Cochlear implant Auditory signal processing Tinnitus 耳鳴治療音声知覚

项目摘要

The purpose of the research is to investigate what degree of tiem-sequential signals can be discriminated by cochlear electrical stimulation and what kind of physiological and psychological feefcts by the electrimental results, time resolution obtained by the time-sequential electrical stimulation to the cochlea was found to be superior to that by auditory stimulation and a speech processing method that spectral patterns are converted into time-sequential signals was found to be effective for transmitting the speech information to the auditory nerves. Furthermore, from the result that tnnitus was suppressed by subthreshold electrical stimulation to the cochlea, an implantable tinnitus suppresser was designed and adopted to three patients with tinnitus. The following is summary of research results.(1)Time resolution was found to be about 150 us from the test of time-sequential electrical stimulation to the cochlea of the hearing impaired and one of pa ; tients could discriminate 5 vowels converted into time-sequential stimuli at 60% correct rate without training.(2)From the results of tinnitus suppression tests by more than 300 persons with tinnitus, it was found that tinnitus disappeared at 30 % of patients and tinnitus reduced at 63%.(3)From the measurements of SOUID, EEG and blood flow, it was assumed that parasympathetic nerves of autonomic nervous system became superior, and the brainstem and the limbic system became active. Although the purpose of the research was to investigate the signal processing mechanism of auditory nervous system, main results were obtained from tinnitus suppression tests. However, it is expected that a part of signal processing mechanisms will be clarfied by the long term use of implantable tinnitus suppressers. As the implantation technique was established and the biocompatibility of the device was porven, the research will be continued to find the optimal signal conversion method of speech signals.

这项研究的目的是调查人工耳蜗电气刺激可以区分哪种程度的TIEM序列信号，以及通过电动结果通过电动结果来分辨的生理和心理feefct，通过时间序列的电刺激获得的时间刺激获得的时间序列是通过跨度刺激和语音处理的方法，以至于逐渐启动的方法是越来越多的，以至于既定的迹象，使得符合时间启动，以至于将光的方法转化为光谱的方法。听觉神经。此外，除了通过对耳蜗的亚阈值电刺激抑制tnnitus，设计并采用了三名耳鸣患者的可植入耳鸣抑制剂。以下是研究结果的摘要。（1）发现时间分辨率约为150我们，从时间顺序的电刺激的测试到听力受损的耳蜗和之一； TINTET可以区分5个元音，以60％的正确速率转化为时间顺序刺激，而无需训练。（2）来自300多人用耳鸣的人的耳鸣抑制测试的结果，发现锡尼的患者以30％的患者和细胞的降低了63％的人（3）均为63％。自主神经系统的发展变得更高，脑干和边缘系统变得活跃。尽管该研究的目的是研究听觉神经系统的信号处理机制，但主要结果是从耳鸣抑制测试获得的。但是，可以预期，长期使用可植入的耳鸣抑制剂，信号处理机制的一部分将被澄清。由于建立了植入技术，并且设备的生物相容性为porven，因此将继续研究语音信号的最佳信号转换方法。