Signal processing and event detection of hip implant acoustic emissions

Comparisons are made between the in-vivo tests and the subsequent in-vitro results, with a clear correlation between the two test methods. In-vivo signals were notably lower magnitude than recordings from subsequent in-vitro laboratory tests made on the implant directly. However, the peak frequency range was closely similar in both cases, indicating that signal attenuation through human soft tissue reduces signal amplitude. The test results and analysis methods presented are key in the development of future data collection and analysis for the development of a full AE-based clinical diagnostic tool.