Inferring basilar-membrane motion from tone-burst otoacoustic emissions and psychoacoustic measurements.
The amplitude of otoacoustic emissions, which arise on the basilar membrane, is assumed to be proportional to basilar-membrane motion. It should then be possible to assess basilar-membrane motion on the basis of otoacoustic emissions. The present study provides support for this possibility by comparing basilar-membrane motion inferred from emissions to that inferred from psychoacoustic measures. Three psychoacoustic measurements believed to be associated with basilar-membrane motion were investigated: (1) pulsation threshold; (2) loudness functions derived from temporal integration; and (3) loudness functions derived from loudness matches between pure tones and multitone complexes. Results of the psychoacoustic measurements and of the tone-burst otoacoustic emissions led to very similar estimations of basilar-membrane motion. Accordingly, emissions could serve as an excellent tool--one that is objective, noninvasive, and rapid--for estimating relative basilar-membrane motion.
Epstein
Michael
M
Institute of Hearing, Speech & Language, Communication Research Lab, Electrical & Computer Engineering Department, Northeastern University, Boston, Massachusetts 02115, USA. mepstein@ece.neu.edu
Florentine
Mary
M
D000161:Acoustic Stimulation / Q000379:methods; D000328:Adult; D001309:Auditory Threshold / Q000502:physiology; D001489:Basilar Membrane / Q000502:physiology*; D005260:Female; D006801:Humans; D008144:Loudness Perception / Q000502:physiology; D008297:Male; D009068:Movement / Q000502:physiology*; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*; D011571:Psychoacoustics