INTRODUCTION: The major reason for revision of total hip replacements remains aseptic loosening. Loosening of the femoral component is primarily diagnosed by using standard radiographs and clinical symptomatology. Uncertain diagnosis may necessitate exposition of the hip joint to verify the actual implant anchorage in the femoral bone stock. Moreover, if the loosening is detected too late, large bone defects can occur, resulting in complicated revision surgery. In order to optimize detection of implant loosening, different research groups proposed diagnostic approaches based on vibrometry. The miniaturized systems with accelerometers placed inside endoprostheses combined with vibration analysis reached a 20% higher sensitivity than the sensitivity of radiographs. Disadvantages of these techniques appeared in signal distortion caused by soft tissue, limitation depending on patient position and twinges caused by the vibrator due to low frequencies. These circumstances require a new sensor approach to detect aseptic implant loosening.