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In order to determine the hearing thresholds and compare them with masking procedures with the minimum and maximum occlusion in users with deep unilateral sensorineural Hypoacusis, 16 BAHA candidates were taken from The Jose A. Rivas Clinic , who were first evaluated otologically and as a result they got negative any retrocochlear pathology. They decided voluntarily their participation in the research and signed informed consent. It was performed an otoscopy and tympanic membrane, then an audiometry that evaluated their minimal hearing thresholds, in addition it was made a logoaudiometry and an acoustic immittance to corroborate the function of the middle ear. Then an evaluation was developed by doing a tonal audiometry using the BAHA in the ear with hypoacusis using the “DIVINO” processor in an open place with the masking where it was applied a noise of 15 dB above the threshold in the ear with normal hearing and 30 dB above the air threshold for the maximum masking. Then the occlusion was performed by introducing impression material covering the entire CAE. For both procedures the thresholds for the frequencies were 500 Hz, 1000Hz, 2000Hz and 4000Hz with the speaker at 0 degrees azimuth. We found significant differences between the procedures, the occlusion is the best procedure for the evaluation of a BAHA implant.

Enmascaramiento vs. Oclusión en la evaluación para el implante BAHA con hipoacusia neurosensorial profunda unilateral