Comparison of transient otoacoustic emission responses from neonatal and adult ears.
Transient otoacoustic emission (TEOAE) responses from neonatal (age: 48 h) and adult subjects (age: 26.6 +/- 10.0 yr) were analyzed by the combined use of recurrence quantification analysis and singular value decomposition. The data from the two age groups showed significant differences and similarities. The neonatal responses presented less deterministic structures than those of the adults in terms of recurrent dynamic features. In both data sets, the same high level of individual specific dynamic features was observed. The results from the singular value decomposition analysis suggest that a large percentage of variability in all of the analyzed responses can be explained by four to five essential modes. This number is lower than that observed in simulated TEOAE responses generated by a five-component gammatone model. A possible explanation is presented, based on simple instrumental and morphoanatomic considerations.
Zimatore
Giovanna
G
Department of Human Physiology and Pharmacology, University of Rome La Sapienza, 00185 Rome, Italy.
Hatzopoulos
Stavros
S
Giuliani
Alessandro
A
Martini
Alessandro
A
Colosimo
Alfredo
A
D000328:Adult; D000375:Aging / Q000502:physiology*; D003198:Computer Simulation; D006801:Humans; D007231:Infant, Newborn; D008954:Models, Biological; D017084:Otoacoustic Emissions, Spontaneous; D025341:Principal Component Analysis; D013223:Statistics as Topic; D013997:Time Factors