John Weber

Learn More
After CHORIMAC-8 and CHORIMAC-12 a new multichannel cochlear implant is presented, characterized by its totally numeric sound signal processing. Owing to FFT the whole speech information is cut into 15 channels, then sequentially transmitted to an implanted receptor and electrode bearer. This digital processing provides the new system with several(More)
Research efforts have been directed towards constructing a fully automated microcomputer-controlled bench-scale 'batch-type' chemical reactor [1-6]. This fully automated reactor can execute repetitive experiments on an approximately 50 ml scale, providing important chemical reaction data during early stages of process development research programmes. The(More)
Monomac monochannel and Minimac multichannel cochlear implants bring to the remaining hearing fibers sound information that is previously converted into adequate electric signals. Both function at constant currents. The Monomac monocanal system possesses only one electrode implanted either inside or outside the cochlea and sends off sound of basic laryngeal(More)
The sound information is sequentially transmitted to 12 electrodes implanted in the cochlea. An electrode bearer introduced through the round window is now commonly used. Frequencies between 100-4 000 Hz and intensities between 40-100 db are only transmitted in a 3 msec time sampling. The output signal is a positive square wave followed by an equal negative(More)
  • 1