Abstract The speed of sound was measured using a multimedia-based equipment with a standard setup involving a resonance tube and a smartphone-based sound source. In contrast to conventional methods, the Phyphox application was employed to generate sound source and resonance process was recorded using a digital camera. The collected data were analysed using Praat to determine time for the resonance condition, and Tracker to measure the corresponding air column length. The speed of sound was then calculated graphically from the measured frequency and wavelength. At an ambient temperature of 27.0 °C, the measured speed of sound was found to be (346 ± 2) m s −1 , in good agreement with established reference values. This simple and accessible method is well-suited for educational laboratories, offering students a practical and engaging way to explore wave phenomena using familiar multimedia tools.
I E Santosa (Wed,) studied this question.