Distortion product otoacoustic emissions in healthy newborns: normative data.
Distortion product otoacoustic emissions (DPOAE) offer an alternative to transiently evoked otoacoustic emissions (TEOAE) as an audiological test. The former can be used as a screening technique, and may also provide frequency-specific information about the functional state of the cochlea. We recorded DPOAE in a group of healthy newborns to establish the characteristics of a DPOAE "audiogram" (DP-gram) in this population. The DP-gram can be obtained with characteristics quite similar to those observed in adults, with two sharp peaks of maximum amplitude at F2 frequencies of 2 kHz and 5-6 kHz, and a decline in DPOAE amplitude in midfrequencies. The results confirm the limitations of DPOAE recording for testing parts of the basilar membrane where lower frequencies are coded.
Marco
J
J
Department of Otorhinolaringology, Valencia University Clinic Hospital, University of Valencia, Spain.
Morant
A
A
Caballero
J
J
Ortells
I
I
Paredes
C
C
Brines
J
J
D000161:Acoustic Stimulation; D003051:Cochlea / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn