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M Hey

Publications and source records attributed to M Hey.

28 records · Page 2Linked to original sources
PubMedDate not supplied

High-speed digital videoimaging of fast eardrum motions during Valsalva maneuver.

Digital high-speed camera systems are used to record high-frequency video-clips. After adapting this technology to the analysis of eardrum motions, fast motions of the eardrum can be recorded using an endoscope. Under specific static pressure conditions during the Valsalva maneuver, recordings of eardrum motions were made. The use of a Kodak Image Ektapro 1000 Motion Analyzer allowed only conventional videosignal processing and storage. A new type of data interface made it possible to save and process the complete video-clip digitally. Using an image-processing workstation and special mathematical algorithms, three-dimensional computer animations of fast eardrum motions under static pressure can be generated. In the present study, several animations of fast eardrum movements are described. High-speed digital videoimaging is an adequate method to describe fast eardrum displacements under static pressure (Valsalva maneuver). It is possible to create visible timeshift images of separate eardrum parts during the fast Valsalva maneuver.

Adult↗
PubMedDate not supplied

Comparison of the TEMPO+ ear-level speech processor and the cis pro+ body-worn processor in adult MED-EL cochlear implant users.

A study was conducted to compare the new MED-EL TEMPO+ ear-level speech processor with the CIS PRO+ body-worn processor in the COMBI 40/COMBI 40+ implant system. Speech tests were performed in 46 experienced subjects in two test sessions approximately 4 weeks apart. Subjects were switched over from the CIS PRO+ to the TEMPO+ in the first session and used only the TEMPO+ in the time between the two sessions. Speech tests included monosyllabic word tests and sentence tests via the telephone. An adaptive noise method was used to adjust each subject's scores to approximately 50%. Additionally, subjects had to complete a questionnaire based on their 4 weeks of experience with the TEMPO+. The speech test results showed a statistically significant improvement in the monosyllabic word scores with the TEMPO+. In addition, in the second session, subjects showed a significant improvement when using the telephone with the TEMPO+, indicating some learning in this task. In the questionnaire, the vast majority of subjects found that the TEMPO+ allows equal or better speech understanding and rated the sound quality of the TEMPO+ higher. All these objective and subjective results indicate the superiority of the TEMPO+ and are mainly attributed to a new coding strategy called CIS+ and its implementation in the TEMPO+. In other words, based on the results of this study, it appears that after switching over from the CIS PRO+ to the TEMPO+, subjects are able to maintain or even improve their own speech understanding capability.

Adult↗