The speed of sound in air of pipe acoustic resonance via the Arduino with LabVIEW interface

The purpose of this study was to develop a modern experimental apparatus using an Arduino with LabVIEW instead of the classical experiment. The wavelength of the sound was determined using the resonance of an air column. The smartphone app was used to generate the desired frequencies. A sound intensity and ultrasonic sensor was used to read the data of sound intensity and distance. The Arduino board using LabVIEW LINX firmware was used as an interface. The resonance frequency for each harmonic series in the pipe (closed at one end) was shown on the laptop. The speed of sound in air was determined and the result was in a good agreement with the theory and experiment.