PROBLEM TO BE SOLVED: To provide a joint sound measuring system capable of noninvasively diagnosing gonarthrosis, and measuring a highly precise vibration signal so as to perform more accurate diagnosis.SOLUTION: A joint sound measuring system includes two or more vibration sensors for detecting vibration accompanying a bending/stretching exercise of an object to be examined and outputting a vibration signal, a first substance layer disposed on the surface on an examination object side of a first vibration sensor which is at least one of the two or more vibration sensors, which has an acoustic impedance higher than the acoustic impedance of a living body, and a vibration transmission suppression layer disposed on the surface on an examination object side of a second vibration sensor which is at least one of the vibration sensors other than the first vibration sensor of the two or more vibrations sensors, which suppresses the transmission of the vibration accompanying the bending/stretching exercise to the second vibration sensor.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT【課題】非侵襲的に変形性膝関節症の診断を行うことができ、かつ、高精度な振動信号を測定することができ、より正確な診断が可能な関節音測定システムを提供する。【解決手段】検査対象物の屈伸運動に伴う振動を検出し、振動信号を出力する2以上の振動センサと、2以上の振動センサの少なくとも1つである第1の振動センサの検査対象物側の面に配置される、生体の音響インピーダンス以上の音響インピーダンスを持った第1物質層と、2以上の振動センサのうち、第1の振動センサ以外の少なくとも1つである第2の振動センサの検査対象物側の面に配置され、前記屈伸運動に伴う振動が前記第2の振動センサに伝達されるのを抑制する振動伝達抑制層とを有する。【選択図】図2
