Distortion product oto-acoustic emission in normally hearing subjects

Thirty normally hearing subjects were examined by distortion product otoacoustic emission [DPOAE] with the aim of collecting parametric normal measures of distortion product otoacoustic emission which provide a base-line against which otoacoustic emission in impaired ears could be compared. Distortion product OAE could be detected in all the tested ears showing significant potential for becoming objective reliable test in evaluating the hearing capacity. Another test, distortion product growth rate provided information about the detection threshold of the emission as well as the suprathreshold growth of this emission with increasing stimulus level

Electronystagmographic changes in pupils with profound hearing loss

The vestibular dysfunction is significantly present in profound sensory neural hearing loss and the acquired causes of deafness showed the higher abnormality of the vestibular system and postnatal acquired hearing loss is the most affected group