北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (6): 1045-1052.doi: 10.13700/j.bh.1001-5965.2019.0381

• 论文 • 上一篇    下一篇

幅度调制稳态听觉刺激脑电信号响应及选择性注意力分析

郑德智1, 贾弘茹1, 姜凤敏2, 朱美意1, 那睿1, 张帅磊1   

  1. 1. 北京航空航天大学 仪器科学与光电工程学院, 北京 100083;
    2. 中国人民大学附属中学, 北京 100080
  • 收稿日期:2019-07-09 发布日期:2020-07-02
  • 通讯作者: 姜凤敏 E-mail:Jiangfengmin@rdfz.cn
  • 作者简介:郑德智 男,博士,教授,博士生导师。主要研究方向:传感器敏感机理与智能感知技术;贾弘茹 女,硕士研究生。主要研究方向:稳态听觉诱发脑-机接口;姜凤敏 女,中学一级教师。主要研究方向:科技教育、人工智能教育。
  • 基金资助:
    国家自然科学基金(61873021);航空科学基金(20185651020);中央高校基本科研业务费专项资金-北航青年拔尖人才资助计划;全国教育科学规划教育部重点课题(DHA160356);国家重大科学仪器设备开发专项(2014YQ350461)

EEG based amplitude-modulated auditory steady-state response and auditory selective attention analysis

ZHENG Dezhi1, JIA Hongru1, JIANG Fengmin2, ZHU Meiyi1, NA Rui1, ZHANG Shuailei1   

  1. 1. School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100083, China;
    2. The High School Affiliated to Renmin University of China, Beijing 100080, China
  • Received:2019-07-09 Published:2020-07-02
  • Supported by:
    National Natural Science Foundation of China (61873021); Aeronautical Science Foundation of China (20185651020);the Fundamental Research Funds for the Central Universities-Top Program of Young Talents Funding of Beihang University; Key Topics of the Ministry of Education of National Education Science Planning (DHA160356); National Key Scientific Instrument and Equipment Development Project (2014YQ350461)

摘要: 闭锁症患者不能自主控制眼球运动,无法使用视觉刺激脑-机接口(BCI)技术实现意识交流,听觉刺激脑-机接口技术不受视觉限制,可实现这类患者的意识交流,具有重要意义。首先,对不同受试者在幅度调制频率变化的听觉诱发刺激下的响应特征进行研究,获得人体大脑听觉通频带的幅频特性。然后,基于受试者的听觉通频带频率特征,设计了全新的听觉选择注意力实验范式,选择响应幅值较强的刺激频率作为受试者的刺激频率,并提出了改进的空间相干脑电(EEG)信号解算方法,提高了算法的鲁棒性,获得了相对更高的准确率,受试者通过注意力选择实现脑-机接口的二分类控制。实验获得了不同受试者的大脑听觉通频带频率特征,得到了人体大脑在35~94 Hz调制频率范围内的听觉幅频特性曲线,发现了响应幅值在35~44 Hz调制频率范围最强。利用改进的空间相干算法,将提出的基于通频带特征的实验范式和固定频率组合的实验范式进行比较,由3名受试者的对比实验表明,所提实验范式和改进的空间相干算法获得了更高的准确率。

关键词: 听觉脑-机接口(BCI), 听觉稳态反应, 听觉选择性注意, 空间相干, 听觉通频带

Abstract: Patients with atresia cannot control eye movement independently, and cannot use visual Brain-Computer Interface (BCI) to realize consciousness communication. The technology of auditory BCI is not restricted by vision. It is of great significance to realize the consciousness communication of such patients. Firstly, the response characteristics of different subjects to auditory evoked stimuli with amplitude modulation frequency change were studied to obtain the amplitude-frequency characteristics of auditory passband. Based on the auditory passband frequency characteristics of subjects, a new auditory selective attention paradigm was designed. The stimulus frequency with stronger response amplitude was selected as the stimulus frequency of subjects. An improved spatial coherence Electroencephalogram (EEG) signal resolution method was proposed, which improves algorithm robustness and achieves higher classification accuracy. The two-class classification was realized through attention selection. In this paper, the frequency characteristics of the auditory passband of different subjects were accessed, and the auditory amplitude-frequency characteristic curves of the human brain in the frequency range of 35-94 Hz are obtained. It was found that the response amplitude is the strongest in the frequency range of 35-44 Hz. By using the improved spatial coherence algorithm, the proposed experimental paradigm based on the passband characteristics and the fixed frequencies experimental paradigm for three subjects were compared and tested. The results show that the proposed experimental paradigm and the improved spatial coherence algorithm achieve higher accuracy.

Key words: auditory Brain-Computer Interface (BCI), auditory steady-state response, auditory selective attention, spatial coherence, auditory passband

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