Cochlear Limited

About: Cochlear Limited is a company organization based out in Sydney, New South Wales, Australia. It is known for research contribution in the topics: Cochlear implant & Hearing loss. The organization has 1290 authors who have published 1479 publications receiving 33109 citations. The organization is also known as: кохлеарные Americas & COCHLEAR LIMITED.

Design issues of a core-less transformer for a contact-less application

Abstract: A set of rules for designing coreless transformers for contactless applications is presented in this paper. In contactless transference of energy, there is a relative big separation distance between the coils, so coupling is low. Several simulations have been performed with an FEA tool studying different technologies and winding strategies in order to quantify the improvements in coupling and resistance for different gaps. The analysis has been done for the transcutaneous transformer of a human-body implant, but the conclusions can be extended to any kind of coreless transformer for a contact-less application. The results are consistent with the measurements.

Perceptual abilities of children with the Nucleus 22-channel cochlear implant.

Abstract: THE PRIMARY OBJECTIVE of the clinical trials in children was to demonstrate that the Nucleus cochlear implant was safe and effective in this population. The demonstration of effectiveness was thought to primarily relate to improvements in speech perception skills, with and without lipreading, after implantation. For postoperative benefit to be considered meaningful, performance with the implant was required to significantly exceed the child’s preoperative performance in the better hearing ear. Best-aided performance preoperatively was typically with binaural amplification, or in about one-quarter of the subjects, vibrotactile devices. As was described in detail by Mecklenburg et al (see Chap. 2), for the purposes of the clinical trial each child was an individual experiment. Preto postoperative changes in performance were analyzed for each test on each child to determine the effectiveness of the device. The data from 80 subjects were analyzed in this manner and on the basis of these data, the Food and Drug Administration granted marketing approval on June 27, 1990. With the accrual of additional patient data since that time, the focus of research interest broadened to include the following questions: (1 ) does performance improve significantly after implantation; (2) does performance continue to improve with longer term experience using the implant; (3) are there factors that predict performance on speech perception measures; (4) do children with congenital deafness achieve the same skill level postoperatively as do children who acquired language before the onset of deafness; and (5) does the type and effectiveness of postoperative rehabilitation influence overall performance.

Thin film fabrication technique for implantable electrodes

Abstract: An elongated implantable electrode assembly (50) includes a set of electrode pads (12, 14) arranged in a pre-selected pattern, and a plurality of longitudinal wires (34, 36), each wire being connected to at least one pad. The electrode assembly is formed by first depositing the pads (12, 14) on a sacrificial layer (10), adding the wires (34, 36) to the pads (12, 14), embedding the pads and wires in a carrier (46) and then removing the sacrificial layer (10). These steps can be performed using photolithographic techniques.