Instantaneous energy spectrum analysis for frequency following response of speech evoked brainstem response.
- Author:
Xian PENG
1
;
Qiuyang FU
;
Chang'an ZHAN
;
Yong LIANG
;
Tao WANG
Author Information
1. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China.
- Publication Type:Journal Article
- MeSH:
Adult;
Brain Stem;
physiology;
Evoked Potentials, Auditory, Brain Stem;
physiology;
Female;
Fourier Analysis;
Humans;
Male;
Speech;
Speech Perception;
physiology;
Young Adult
- From:
Journal of Biomedical Engineering
2012;29(2):337-364
- CountryChina
- Language:Chinese
-
Abstract:
Speech evoked brainstem responses (s-ABRs) elicited by a speech syllable /da/ are composed of four parts: onset response (OR), transitional response, frequency following response (FFR) and offset response. FFR elicited by periodic events behaves like a quasi-periodic waveform corresponding to the stimulus sounds. The fast Fourier transform based spectra are commonly used to exam the characteristics of s-ABR in practice, which is, however, unable to trace the occurrence of the main components of s-ABR. The FFR is usually not obvious in the original individual s-ABR waveform. In this paper, we proposed a novel approach to observe the FFR by an instantaneous energy spectrum performed on the intrinsic mode functions (IMFs) after empirical mode decomposition (EMD) of the s-ABR. We demonstrated that the FFR is most pronounced on the second layer of IMFs. This finding suggests a new way which may be available to characterize and to detect the FFR better. This will benefit the clinic applications of s-ABRs.
