Interaction of otoacoustic emissions with additional tones: suppression or synchronization?
The influence of an external tone on transitory evoked otoacoustic emissions (TEOAE) is investigated. Three different averaging techniques were used with the same acoustic stimulus paradigm. These techniques permitted the separation of those parts of the otoacoustic emission (OAE) that contribute to the transitory evoked otoacoustic emission and those parts of the OAE that are synchronized to the continuous tone. The experiments show that the total energy of the OAE is not reduced in the presence of an additional tone. The 'suppression' of TEOAEs is an effect of synchronization and the subsequent elimination of the 'suppressed' emission in the averaging procedure.
Neumann
J
J
AG Medizinische Physik, Universität Oldenburg, Germany.
Uppenkamp
S
S
Kollmeier
B
B
D000161:Acoustic Stimulation; D000162:Acoustics; D000328:Adult; D005072:Evoked Potentials, Auditory / Q000502:physiology; D006801:Humans; D008297:Male; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*; D013997:Time Factors