An ultrasonic apparatus has a pulse transmission and reception unit, an envelope curve detection unit, a time difference detection unit, and an attenuation characteristic obtaining unit. The pulse transmission and reception unit transmits a first transmitted pulse that a frequency increases with time and a second transmitted pulse that the frequency decreases with time, further receives a first received pulse corresponding to the first transmitted pulse and a second received pulse corresponding to the second transmitted pulse. The envelope curve detection unit detects a first envelope curve based on the first received signal and a second envelope curve based on the second received signal, respectively. The time difference detection unit detects a time difference between the first envelope curve and the second envelope curve. The attenuation characteristic obtaining unit obtains a frequency dependent-attenuation characteristic of an ultrasonic base on the time difference.