Otoacoustic emission in cases of presbyacuosis

ABSTRACT

This study conducted on 100 cases divided into two groups the study group included 60 patients with mean age 68.48% +/- 8.8, the control group included 40 persons with mean age 33.90% +/- 7.77 years, all of them subjected to pure tone audiometery. immitancemetery and transient evoked otoacoustic emission [TEOAE]. All patients showed diminusion of hearing at all frequencies, all patients had normal tympanogram [Type A] except 20% showed negative middle ear pressure [Type C]. 55.75% of the patients showed absent acoustic reflex. The study group showed absent 50% of TEOAE at 1,2 3 and 4 KHz with decreased amplitude and wave reproducibility. We concluded that TEOAE response decreased substantially with age and there was a good correlation between b and reproducibility and pure tone audiometery also between b and reproducibility and acoustic reflex at 1 KHz and there was a good relationship between absence of acoustic reflex and absence of TEOAE at 1, 2 and 4 KHz