PROBLEM TO BE SOLVED: To measure information inside a living body by using a noninvasive and simple method without burdening a subjects body as much as possible.SOLUTION: An exciter 1 gives an oscillatory wave having a single frequency selected from an audible zone range to a living body. A geophone 2 receives the oscillatory wave propagating in the living body 10 at a position a prescribed distance apart from a position at which the exciter 1 has given the oscillatory wave to the living body. A search unit 3A, while varying a frequency of the oscillatory wave given to the living body 10 by the exciter 1, searches for the oscillatory waves frequency at which a phase difference between the oscillatory wave given to the living body 10 by the exciter 1 and the oscillatory wave received by the geophone 2 is a specific phase difference. A calculation unit 3B, on the basis of the frequency having been searched by the search unit 3A, calculates the oscillatory waves propagation speed in the living body 10.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】被検者の身体にできるだけ負担をかけることなく、非侵襲かつ簡便な方法で生体内部の情報を計測する。【解決手段】加振器1は、可聴域の範囲から選択された単一の周波数の振動波を生体に与える。受振器2は、加振器1が生体に振動波を与える位置から所定距離離れた位置で、生体10を伝わる振動波を受振する。探索部3Aは、加振器1によって生体10に与えられる振動波の周波数を変更しながら、加振器1により生体10に与えられる振動波と受振器2で受振される振動波との位相差が特定の位相差となるような振動波の周波数を探索する。算出部3Bは、探索部3Aで探索された周波数に基づいて、生体10中における振動波の伝搬速度を算出する。【選択図】図1
