High resolution time-frequency analysis of otoacoustic emissions.
High resolution time-frequency analysis of OAE signals evoked by stimuli of different strength was performed by means of the Matching Pursuit algorithm. The method relies on adaptive decomposition of a signal into waveforms of well-defined frequency and time localization. Energy of OAE as a function of time and frequency was evaluated for stimuli strength of 35-80 dB SPL. Dynamic characteristics of the signal were constructed. For strong stimuli decrease of the power of high frequency components was found. Matching Pursuit proved to be a method which offers high resolution parametrisation of OAE in time-frequency space and provides excellent possibilities of investigation of the signal generation mechanisms.
Laboratory of Medical Physics, Warsaw University, Warszawa, Poland.
K J
KJ
Blinowska
P J
PJ
Durka
A
A
Skierski
F
F
Grandori
G
G
Tognola
D000161:Acoustic Stimulation / Q000379:methods*; D000465:Algorithms; D001301:Audiometry, Pure-Tone / Q000379:methods*; D003051:Cochlea / Q000502:physiology*; D006801:Humans; D008962:Models, Theoretical; D017084:Otoacoustic Emissions, Spontaneous; D011846:Radio Waves; D012680:Sensitivity and Specificity; D013997:Time Factors