Velocity of Sound in Evaluated Medium

We report the results of our experimental measurements of the velocity of sound in response to changes in temperature and air pressure. We used a circuit made with an ultrasonic sensor and a basic microcontroller to make these measurements. The apparatus was kept in a temperature- and air pressure-controlled chamber. Our experimental results showed that as air pressure drops, so does sound velocity. It was discovered that the experimental findings closely matched the theoretical formulations given in the literature. To express sound velocity in ideal and real gases in terms of experimentally controllable variables, we modified the equation found in the literature. We have experimentally shown that air behaves differently between an ideal gas and a real gas below a critical air pressure. It has also been noted that this critical threshold depends on the surrounding temperature. Our experimental findings validate a theoretical formulation that has been largely neglected for over 20 years.