TY - JOUR
T1 - Ipsilateral suppression effects on transient evoked otoacoustic emission
AU - Tavartkiladze, G. A.
AU - Frolenkov, G. I.
AU - Kruglov, A. V.
AU - Artamasov, S. V.
PY - 1994/1
Y1 - 1994/1
N2 - The spectral properties of click- and tone-evoked otoacoustic emission (OAE) under ipsilateral simultaneous tonal masking conditions as well as the changes of click-evoked OAE under ipsilateral forward masking by clicks were studied in normalhearing subjects. It was found that (i) transiently evoked OAE (TEOAE) spectra consist of a number of peaks individual to the subject and distributed along a sufficiently wide cochlear region; (ii) each spectral peak is excited only when the stimulus energy was concentrated within the frequency range covering the frequency of the particular peak; (iii) different TEOAE spectral peaks can be masked independently under simultaneous tonal masking conditions; (iv) the TEOAE tuning curve shape is more closely related to the spectrum of TEOAE but not to that of the stimulus; (v) forward masking of TEOAE generation is most pronounced during the first few milliseconds after masker click onset and become significantly smaller with the longer latency. It is suggested that; (i) TEOAE is generated by a number of local generators individually distributed along the cochlear partition within a sufficiently wide region and characterized by different power; (ii) possible efferent effects in the ipsilateral TEOAE suppression are negligible as compared to the TEOAE reduction of exclusively cochlear origin.
AB - The spectral properties of click- and tone-evoked otoacoustic emission (OAE) under ipsilateral simultaneous tonal masking conditions as well as the changes of click-evoked OAE under ipsilateral forward masking by clicks were studied in normalhearing subjects. It was found that (i) transiently evoked OAE (TEOAE) spectra consist of a number of peaks individual to the subject and distributed along a sufficiently wide cochlear region; (ii) each spectral peak is excited only when the stimulus energy was concentrated within the frequency range covering the frequency of the particular peak; (iii) different TEOAE spectral peaks can be masked independently under simultaneous tonal masking conditions; (iv) the TEOAE tuning curve shape is more closely related to the spectrum of TEOAE but not to that of the stimulus; (v) forward masking of TEOAE generation is most pronounced during the first few milliseconds after masker click onset and become significantly smaller with the longer latency. It is suggested that; (i) TEOAE is generated by a number of local generators individually distributed along the cochlear partition within a sufficiently wide region and characterized by different power; (ii) possible efferent effects in the ipsilateral TEOAE suppression are negligible as compared to the TEOAE reduction of exclusively cochlear origin.
KW - outer hair cells
KW - simultaneous and forward masking
KW - transiently evoked otoacoustic emission
KW - tuning curves
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U2 - 10.3109/03005369409086568
DO - 10.3109/03005369409086568
M3 - Article
C2 - 7735147
AN - SCOPUS:0028609591
SN - 0300-5364
VL - 28
SP - 193
EP - 204
JO - British Journal of Audiology
JF - British Journal of Audiology
IS - 5 --Apr
ER -