Videos by Norbert Dillier
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Papers by Norbert Dillier
Journal of hearing science, 2011
Acta Oto-laryngologica, 1990
Annals of Otology, Rhinology, and Laryngology, Jun 1, 1990
Annals of Otology, Rhinology, and Laryngology, 1987
Hearing devices are mostly tested using controlled laboratory environments. These feature simplif... more Hearing devices are mostly tested using controlled laboratory environments. These feature simplified auditory representations of the real conditions under which the hearing devices will perform once released, such as one speech signal played from one loudspeaker plus a noise signal playing from another loudspeaker. It can however be insufficiently realistic for some of the processing included in the devices. In order to circumvent this limitation, Virtual Sound Environments (VSE) can be used to simulate complex sound fields using headphones or arrays of loudspeakers, and thus to offer more realistic conditions than most common hearing device evaluation protocols. In this paper, a hearing device algorithm based on Interaural Level Differences (ILD) was evaluated using Binaural Room Impulse Responses (BRIR, used here as a reference), and artificial room effects reproduced via either Higher Order Ambisonics (HOA) or Vector-Based Amplitude Panning (VBAP). Results show that the algorithm...
The realization of a hearing prosthesis which provides sensory deaf patients with improved speech... more The realization of a hearing prosthesis which provides sensory deaf patients with improved speech discrimination ability and better communication possibilities is based upon the following hypothesis: A neurosensory deaf patient with at least a partially intact auditory nerve would perceive acoustic Signals if an activation pattern equivalent to the pattern in a normal ear could be reproduced artificially in his auditory nerve. A model of the peripheral auditory System has been reviewed and adapted to new physiological data to explain differences in the excitation patterns of Single auditory nerve fibers between acoustic and electrical Stimulation. Experiments with electrical Stimulation in the external ear canal and on the promontory in 3o deaf patients and 15 normal hearing subjects have shown hearing sensations in more than So % of the deaf patients although the thresholds of discomfort were very close or even below the thresholds of hearing. Extended evaluation tests with a 5o ye...
International Journal of Audiology, Dec 29, 2021
Progress in Brain Research, 1993
IEEE Transactions on Biomedical Engineering, Aug 1, 2022
Springer eBooks, 1985
We have developed a system of classification using a relatively short list of code numbers derive... more We have developed a system of classification using a relatively short list of code numbers derived from the international code. This enables us to determine the frequency with which any one audiological or otological diagnosis is made, as well as the frequency of combinations of these diagnoses. It is hoped that this system will help the user to determine the relationship between disease entities in an audiological caseload. Furthermore, it may render possible a comparison of diagnoses and therapeutic results between different centers.
Otolaryngologic Clinics of North America, Feb 1, 1983
Ear Research Japan, 1983
Perilymphatic Oxygenation and Dynamic Pressure Changes by Reduced Vascular Supply to the Inner Ea... more Perilymphatic Oxygenation and Dynamic Pressure Changes by Reduced Vascular Supply to the Inner Ear K. Nagahara*, N. Dillier, U. Fisch, S. Kishimoto** * ENT Department , Kyoto National Hospital ** ENT Department , University of Zurich, Switzerland The effect of making granulation and resulting fibrotic changes in the internal auditory canal (IAC) following powdering of metyl methacrylate was examined in 24 special pyrogen free cats. Six months prior to the measurements the IAC was opened by the middle fossa approach and the superior wall of the meatus was removed . Metyl methacrylate powder was inserted into the meatus . The perilymphatic oxygen tension by the polarographic technique, hydrostatic pressure by servo-controlled micropipet system, CM, AP, were recorded. The initial perilymphatic PO2 values of the sides of reduced vascular supply and the contralateral control ears werre 11 .8±3.8 mmHg and 23.3 ±6.7 mmHg, respectively. Sensorineural hearing loss (high tone loss of on avera...
Journal of Biomedical Science and Engineering, 2018
Annals of Otology, Rhinology & Laryngology, 2001
A method is described that allows, for the first time, intraoperative vibration modes assessment ... more A method is described that allows, for the first time, intraoperative vibration modes assessment of the acoustically stimulated stapes by means of scanning laser Doppler interferometry (LDI). The study was designed to answer the following questions: 1) Is LDI practical for taking measurements during surgery? 2) Are the results comparable to the findings in temporal bone preparations? and 3) Do the vibration characteristics of the stapes change after the posterior incudal ligament is detached from the incus? Seven patients with profound bilateral hearing loss who were undergoing cochlear implantation were included in the study. The measurement system was easily applicable for intraoperative measurements and allowed contact-free analysis with very high accuracy. No major differences in the results from the live human subjects and temporal bone preparations were observed. The stapes movement was predominantly pistonlike at the lower frequencies and became complex at higher frequencies....
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Videos by Norbert Dillier
Papers by Norbert Dillier