Age and outcome of cochlear implantation for patients with bilateral congenital deafness in a Cantonese-speaking population.

Objective: To evaluate the effect of age at implantation by assessment of speech perception in cochlear implant users with bilateral congenital deafness.

Design: A retrospective cohort analysis of 60 cochlear implant users (age at implantation, 1.01 to 22.

Occupational hearing loss: screening with distortion-product otoacoustic emissions.

Hearing assessment of applicants for occupational hearing loss compensation can be a time-consuming process. An accurate screening procedure that is sensitive to occupational hearing loss may have application in many situations. The present study developed distortion-product otoacoustic emission (DPOAE) screening criteria to identify subjects likely to meet the Hong Kong requirements for occupational hearing loss compensation, namely a bilateral sensorineural loss > or = 40 dB HL (average of 1000, 2000 and 3000 Hz).