APPARATUS FOR THE ACOUSTIC EVALUATION OF MIDDLE EAR PROSTHESES

摘要

Test instrument (1) for auditory prostheses, comprising a support structure (11) having a first and a second hole (12, 13) facing each other; a first hollow cylinder (14) simulating the external auditory meatus, housed in the first hole (12) and having a first end (14a) which is open and a second end (14b) which is closed by a membrane (15) of polymer material simulating the tympanic membrane; a second hollow cylinder (16) housed in the second hole (13), closed at both ends and filled with a liquid simulating the cochlear fluid, wherein one (16a) of the ends of the second cylinder (14) is closed by a membrane (17) of polymer material simulating the oval window and facing the membrane (15) of the second end (14b) of the first cylinder (14); a device positioning area located between the membrane (15) of the first cylinder (14) and the membrane (17) of the second cylinder (16) for receiving an auditory prosthesis to be tested (P); and a receiver seat (16b) formed within the second cylinder (16) for receiving a microphone (5) to be placed in contact with the liquid.