DEVELOPMENT OF EXPERIMENTS WITH MICROPHONE AND OSCILLOSCOPE FOR TEACHING ACOUSTICS IN HIGHSCHOOLS

Abstract

The concept of sound is highly linked to students’ lives because of its regular phenomena and applications. That is the reason why teaching of sound is crucial. To grasp the nature of sound, students need to observe and analyze sound graphs through real experiments. However, there are only a few acoustic experiments in the current school physics curriculum. Especially, plotting graphs of sound is just brief description of experiments in textbooks. Equipment for these experiments has not been facilitated at schools yet. Thus, it needs to develop a laboratory set to do experiments with sound graphs on screen in order for students to observe physical characteristics of sound visually and practically. Combining microphone with oscilloscope can be feasible and effective for such experiments. This paper presents the laboratory set using oscilloscope and microphone as well as related experiments, which enable students to investigate phenomena and properties of sound. Additionally, we recommend the use of these experiments in teaching the acoustics theme.