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Indexed/Abstracted in: EMBASE, Scopus
Online ISSN 1827-188X
Canale A., Lacilla M., Giordano L., Cavalot A. L., Ferrero V., Albera R.
Università degli Studi - Torino II Clinica ORL - Dipartimento di Fisiopatologia Clinica
Background. Otoacustic emissions (OAEs) measurement is nowdays a good method for the assessment of hearing in newborns and in adults’ cochlear patology. The literature points out that the behaviour of OAEs is different in relation to sex. The aim of this study is to evaluate the difference in females and males of spontaneous otoacustic emissions (SOAEs), of transient otoacoustic emissions (TOAEs) and of distortion products (DPOAEs).
Methods. In this comparative study 20 females and 20 males were examined. They were between 20 and 40 years old. All subjects were submitted to the most common audiologic tests to exclude ear pathology. SOAEs and TOAEs study was carried out with ILO88. The presence, frequency and amplitude of SOAEs was assessed. DPOAEs study was carried out with ILO 92 and the evaluation was done on the amplitude of distortion products with 2f1-f2 frequency.
Results. SOAEs were recorded in 60% of females and 65% of males, with a mean amplitude bigger in female, not statistical significant, and with the same frequency gap. TOAEs and DPOAEs generally showed amplitudes higher in females than in males. The difference was statistically significant only in distortion products recorded with f2 near to 3300 and 4100 Hz. The study also showed audiometric values higher in males than females, even if all normal, that were statistically significant over 2000 Hz.
Conclusions. The data would seem to exclude a different behaviour of otoacustic emissions in female and male due to anatomic or functional factors of external, middle and inner ear. The only statistical significant difference was obtained with the most sensitive otoacustic emissions, DPOAEs, and it seemed to be justified by a better audiometry in female.