Problem to be solved: to provide an ultrasonic observation apparatus in which the S \/ N ratio of the received signal is improved more than in the prior art.The ultrasonic observation apparatus has a transmitting portion for transmitting a plurality of transmission signals for causing a plurality of ultrasonic waves having a different center frequency to be different from each other to be observed on an ultrasonic transducer, and a plurality of ultrasonic waves received by the ultrasonic vibrator received by the ultrasonic transducer A frequency spectrum calculating section for calculating a frequency spectrum based on at least two received signals, each of which is received by a receiver receiving a signal and a plurality of received signals received by the receiverAmong the frequency spectra calculated by the ki frequency spectrum calculating section, there is provided a feature amount calculating section for calculating a feature amount determined by using at least two frequency spectra.Diagram【課題】受信信号のS/N比が従来よりも向上した超音波観測装置を提供すること。【解決手段】超音波観測装置は、観察対象に対して中心周波数が互いに異なる複数の超音波を超音波振動子に照射させる複数の送信信号を送信する送信部と、前記観察対象において反射された前記複数の超音波を前記超音波振動子が受信して出力した複数の受信信号を受信する受信部と、前記受信部が受信した前記複数の受信信号のうち、少なくとも2つの受信信号に基づいた周波数スペクトルをそれぞれ算出する周波数スペクトル算出部と、前記周波数スペクトル算出部が算出した周波数スペクトルのうち、少なくとも2つの周波数スペクトルを用いて定まる特徴量を算出する特徴量算出部と、を備える。【選択図】図1
