EEG时间轴数据上复杂和声中的周期性音高检测
Periodicity Pitch Detection in Complex Harmonies on EEG Timeline Data
AI总结：
本研究利用EEG和FFR分析复杂和声（包括挂留和弦）的周期性音高在听觉脑干中的非线性处理，发现预先计算的周期性音高频率在EEG频谱中以一定精度出现，尽管存在抖动问题。
摘要：
声学刺激（例如音乐和声）在耳朵和大脑的听觉过程中以高度非线性的方式被转换。我们通过使用频率跟随响应（FFR）比较输入刺激的频谱及其在听觉处理流中的响应频谱来研究这一现象。通过脑电图（EEG），我们通过分析FFR来探究复杂和声的周期性音高（与其缺失基频相关）是否在听觉脑干中被添加。其他实验侧重于大、小三和弦及二和弦等常见音乐和声，我们还考虑了挂留和弦。挂留和弦产生了常见三和弦所没有的张力，因此在三和弦中占据特殊地位。在观看静音自然纪录片时，参与者听到合成的经典钢琴三和弦和单音，刺激持续时间为300ms，刺激间隔为100ms。我们采集了64个电极的EEG数据，采样率为5kHz，以获得人脑感知过程足够详细的分辨率。对EEG响应应用快速傅里叶变换（FFT），从刺激开始后50ms起算，频谱评估显示，预先计算的周期性音高频率+/-3Hz能以一定精度出现。然而，抖动在这里是一个问题。注意，所寻找的周期性音高频率在刺激的频谱中并不物理存在。
英文摘要：
An acoustic stimulus, e.g., a musical harmony, is transformed in a highly non-linear way during the hearing process in ear and brain. We study this by comparing the frequency spectrum of an input stimulus and its response spectrum in the auditory processing stream using the frequency following response (FFR). Using electroencephalography (EEG), we investigate whether the periodicity pitches of complex harmonies (which are related to their missing fundamentals) are added in the auditory brainstem by analyzing the FFR. While other experiments focus on common musical harmonies like the major and the minor triad and dyads, we also consider the suspended chord. The suspended chord causes tension foreign to the common triads and therefore holds a special role among the triads. While watching a muted nature documentary, the participants hear synthesized classic piano triads and single tones with a duration of 300ms for the stimulus and 100ms interstimulus interval. We acquired EEG data of 64 electrodes with a sampling rate of 5kHz to get a detailed enough resolution of the perception process in the human brain. Applying a fast Fourier transformation (FFT) on the EEG response, starting 50ms after stimulus onset, the evaluation of the frequency spectra shows that the periodicity pitch frequencies calculated beforehand +/-3Hz occur with some accuracy. However, jitter turned out as a problem here. Note that the sought-for periodicity pitch frequencies do not physically exist in the frequency spectra of the stimuli.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
