2f1-f2 distortion product otoacoustic emission latency: changes with frequency and level of primaries.
Audiology
; 36(2): 72-82, 1997.
Article
in En
| MEDLINE
| ID: mdl-9099405
ABSTRACT
Distortion product otoacoustic emissions (DPOAEs) provide a non-invasive and relatively direct method for evaluating cochlear travel time in humans. In the present study, the 2f1-f2 DPOAE latency was deduced from DPOAE phase shift according to f2 frequency shift, with f1 being fixed, using the ILO92 system. Latencies of 2f1-f2 DPOAEs were recorded at various primary frequencies and levels. Results were not wholly consistent with previous latency estimates. This study showed that the functions describing both 2f1-f2 DPOAE latency decrease with primary frequency increase, at several primary-tone levels, and 2f1-f2 DPOAE latency decrease with primary-level increase, at various frequencies, are best fit by exponential equations. The results of the evaluation of the latency-frequency-level relationship indicated the possibility of linking these three variables by the following expression Latency = 68.30 exp (-0.027I -0.000434 f)+1.13.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Acoustic Stimulation
/
Cochlea
Limits:
Adult
/
Female
/
Humans
/
Male
Language:
En
Journal:
Audiology
Year:
1997
Document type:
Article
Affiliation country:
France
Country of publication:
CH
/
SUIZA
/
SUÍÇA
/
SWITZERLAND