Instantaneous energy spectrum analysis for frequency following response of speech evoked brainstem response / 生物医学工程学杂志
Journal of Biomedical Engineering
;
(6): 337-364, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-271778
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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Physiology
/
Speech
/
Speech Perception
/
Brain Stem
/
Evoked Potentials, Auditory, Brain Stem
/
Fourier Analysis
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
Chinese
Journal:
Journal of Biomedical Engineering
Year:
2012
Type:
Article
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