AI Article Synopsis
- Round-window stimulation is a new method for using active middle-ear implants, focusing on factors that affect its effectiveness.
- Experiments conducted on six human temporal bones revealed that a 1.0-mm diameter rod with a 30° inclined tip and a silicone pad yielded the best vibration amplitude ratio between the stapes and the round-window actuator.
- The optimal amplitude ratios were found to be 0.34 at frequencies up to 1.5 kHz and 0.27 at frequencies up to 20 kHz, with minimal variability, highlighting the importance of membrane pretension and actuator design for optimal performance.
Article Abstract
Round-window stimulation is a new clinical approach for the application of active middle-ear implants. To investigate factors influencing the efficiency of round-window stimulation, experiments in 6 human temporal bones were performed with different actuator geometries and coupling conditions. The experiments show that the amplitude ratio between stapes and round-window actuator vibration is most efficient when using a 1.0-mm diameter rod with a 30° inclined tip geometry and an attached silicone pad. In this case, the amplitude ratio is 0.34 for frequencies up to 1.5 kHz and 0.27 for frequencies up to 20 kHz, with a standard deviation of only 4-6 dB at most frequencies. The analysis of data presented here and in a companion paper suggests that control of proper round-window membrane pretension as well as the inclined tip geometry are the major requirements for maximal performance.
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| http://dx.doi.org/10.1159/000333807 | DOI Listing |
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