Four groups of new methods of indirect ultrasonoscopy and ultrasonography are developed: those using temperature‐sensitive chromotropic compounds, those using leucobases of dyes, those using thermo‐stimulable phosphors, and those using special temperature‐sensitive phosphors. Various techniques are described and some results shown in the illustrations. Finally, a new method of direct ultrasonography is proposed. This method makes use of the possibility to detonate certain labile chemical compounds by ultrasonics.