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This paper describes a frontal lobe brain flow when people listen to a second language. In this study, the subject listen English of several different levels. For the measurement, I use the optical topography, and considered the changes in the amount of hemoglobin oxygenation. Results of cutting the direct current component of the measured waveform and subjected to signal processing such as Fourier transform, several different indications in English level of the subjects have been identified.doi:10.15002/00010331 fatcat:tqqazkwk75ao5f3q22wvfrhpfe