PROBLEM TO BE SOLVED: To provide a system in which a determination can be made whether or not immobilization is properly performed by the change of sound generated in hammering when installing a stem and a receiving side component of a femoral head, in an artificial joint (hip joint and shoulder joint) replacement, and as a result, the damage of the component periphery tissue can be prevented.SOLUTION: A system is provided in which, in an artificial hip joint or an artificial shoulder joint replacement, the fact that a component is precisely installed with fixation is displayed when installing a receiving side component of a femoral head in a hip bone or scapula, alternatively in an upper arm, and thereby the damage in the periphery of the component is prevented when installing the component. The system includes: (i) a microphone for collecting the sound generated in hammering for component installation (ii) means for finding a frequency spectrum of the sound collected by the microphone (iii) processing means for finding a peak frequency from the frequency spectrum found in (ii) (iv) memory means for storing the peak frequency found in (iii) and (v) alarm display means for issuing an alarm based on a control signal of the processing means of (iii). The processing means compares the found peak frequency with the past peak frequency stored in the memory means, and the alarm display means is made to display warning when the peak frequency reaches a constant value.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】人工関節(股関節及び肩関節)置換術において、ステムと骨頭の受け側コンポーネント設置の際のハンマリング時に発生する音の変化により、固定化が適切にされたかを判断することができ、その結果、コンポーネント周辺組織の損傷を防止し得るシステムの提供。【解決手段】人工股関節又は人工肩関節置換術において、寛骨又は肩甲骨若しくは上腕に骨頭の受け側コンポーネントを設置する際に、コンポーネントが固定性をもって的確に設置されたことを表示することにより、コンポーネント設置時のコンポーネント周辺の損傷を防止するシステムであって、(i) コンポーネント設置のためのハンマリング時に発生する音を集音するマイク、(ii) マイクにより集音された音の周波数スペクトラムを求める手段、(iii) (ii)で求めた周波数スペクトラムからピーク周波数を求める処理手段、(iv) (iii)で求めたピーク周波数を記憶する記憶手段、及び(v) (iii)の処理手段の制御信号に基づき警報を発するアラーム表示手段、を備え、前記処理手段は、求めたピーク周波
