A biological sound inspection apparatus for accurately estimate the state of a living body by the body sound acquired, the first bio-sound measuring unit for generating a first biological sound signal of the first part of a living body (101), from the first portion power ratio to calculate second biological sound measurement unit configured to generate a second biological sound signal of the second site close to the sound source of the living body sound (102), the power ratio of the first bio-sound signal to the power of the second biological sound signal By the calculating unit (304), for power ratios, performs operations for suppressing the effect of at least one of the body mass flow rate and respiration of a living body, as one of the living body sound characteristics, the transfer characteristic of the biological indicators in a biological sound diseases gain calculation unit that calculates the (305), power calculation unit for calculating a first power is a power of the second biological sound signal in the first frequency band (301), whereas the first power, and respiratory flow rate of the biological I includes diseases high frequency power ratio calculation unit that calculates as one of the other biological sound characteristics, a sound characteristic indicator of the biological sound by performing suppress calculating the effect of at least one of physique and (303).取得した生体音によって生体の状態を精度よく推定する生体音検査装置であって、生体の第一部位の第一生体音信号を生成する第一生体音測定部(101)と、第一部位より生体音の音源に近い第二部位の第二生体音信号を生成する第二生体音測定部(102)と、第二生体音信号のパワに対する第一生体音信号のパワ比を算出するパワ比算出部(304)と、パワ比に対し、生体の呼吸流速及び体格のうち少なくとも一方の影響を抑制する演算を行うことにより、生体音の生体における伝達特性指標を、生体音特性の1つとして算出する疾病ゲイン算出部(305)と、第一周波数帯域における第二生体音信号のパワである第一パワを算出するパワ算出部(301)と、第一パワに対し、生体の呼吸流速及び体格のうち少なくとも一方の影響を抑制する演算を行うことにより生体音の音源特性指標を、生体音特性の他の1つとして算出する疾病高域パワ比算出部(303)とを備える。
