DSSF3 turns your standard PC into Highest-grade measurement instrument. Powerful real-time analyzer includes signal generator, oscilloscope, spectrum and octave analyzer, real time spectrogram, phase meter, and data recorder. THD analyzer and impulse response measurement. An user of our product comments Quality sound measurement software equivalent to at least US$50,000 hardware!. This is the software you need! We recommend DSSF3 In the basic research, use of DSSF3 in the field of engineering or life science has started in addition to acoustics. In life science, the elucidation of a high order brain function which performs subjective evaluation of preference and comfortableness has started. In the field of engineering, it is applied to oscillating analysis or electronic measurement. Then, we aim to apply this research to a product design, or to construct a database about sensitivity in the field of information processing.