A new microcomputer-based laboratory version of the Rüchardt experiment for measuring the ratio γ=C p /C v in air

We describe a new version of the Rüchardt experiment in which we record the time evolution of temperature, pressure, and volume oscillating around an equilibrium value. We use a portable microcomputer-based laboratory made of a graphic calculator, an interface, two commercial sensors (sonar and barometric sensor), and a homemade temperature sensor.