A Study on Intensity of Sound Waves for Variable Frequency

Smart phones have a positive effect on students’ interest and curiosity. The current research focuses on "A study on sound intensity for variable frequency." Sensors in smart phones give the best possible result in a physics experiment. To record experimental data, internal sensors like audio amplitude and a tone generator are used in the "Phyphox" application, which was specifically designed to make experiments easy. The intensity of sound for a female voice can be measured by using a pair of smart phones, where one smart phone acts as a source (to generate frequency) and the other is used to measure intensity. The source phone is at one end of the scale, and the detected phone is 1 cm away from it; both are along the X-axis. Similarly, results for the Y and Z axes are obtained. In this manuscript, we used the frequencies from 165 Hz to 210 Hz. The results are shown in graphs. As the frequency is increasing, the value of the sound pressure is showing different changes.