This study investigates the cochlear origin of the multiple temporal lobes that are often observed in the transient-evoked otoacoustic emission (TEOAE) envelope. This "waxing and waning" of the OAE amplitude can be observed in tone-burst (TB) OAEs and sometimes also in click-evoked (CE) OAEs. TBOAE envelopes were analyzed for several frequency and level configurations to investigate the relation between the envelope periodicity and the characteristic frequency of the emission component. It was found that the TBOAE envelope periodicity was dominated by the modulation caused by the interaction of several CEOAE and SOAE frequency components close to the stimulus frequency. A second and smaller TBOAE envelope component showed a qualitative agreement with envelope periods predicted by a model based on multiple cochlear reflections. Multiple reflections between the frequency components in the TBOAE and the middle-ear boundary may contribute to the TBOAE envelope periodicity, but were not the main modulation component in waxing and waning of the investigated TBOAEs.
|Title of host publication||Proceedings of Forum Acusticum 2011|
|Publication status||Published - 2011|
|Event||Forum Acusticum 2011 - Aalborg, Denmark|
Duration: 26 Jun 2011 → 1 Jul 2011
|Conference||Forum Acusticum 2011|
|Period||26/06/2011 → 01/07/2011|