Development of the Industrial Arts Education Class about Wave and Sound

We develop the industrial arts education class about wave and sound, which strength the cooperative study between the subject of science and technology at the junior high school. An outline of the developed class is as follows : In the first lesson, the students observe the amplitude and the frequency with the oscilloscopes and learn the principle of condenser microphone. In the second and third lesson, they learn the soldering method, and manufacture the operation circuit of condenser microphone. In the fourth lesson, the wave form from the operation circuit of condenser microphone manufactured by each student is verified with the oscilloscopes. Moreover, by connecting the operation circuit of condenser microphone with the mini−amplifier whose gain is about 10, the sound as an output is also verified. Finally, in the fifth lesson, the technology and device which control the sound such as an effect unit is explained. The class was successfully carried out among 18 junior high school students, and received generally favorable feedbacks from the school students. From the assessment with the questionnaire investigation, it is indicated that the developed class can be utilized for cooperative study between the subject of science and technology at the junior high school.departmental bulletin pape