NTC-22.05.10 “Determination of sound speed in air”

The structure of the control unit includes a power source, a power amplifier and a 28-channel meter. The control unit is connected to a PC (not included in delivery set) via USB-port. Sound control and display of measurement results are accomplished on the PC.

When the sound source is switched on, the waves passing through the tube are reflected from the plug and create counter fluctuations, which form a standing wave. The graphs of sound vibrations are displayed on the PC screen in real time mode. Along with the graphical representation of a real acoustic process, the program performs a theoretical plot of the standing wave, which is built with the help of mathematical modeling methods. When changing the radiation frequency between 0 and 500 Hz, the program registers various periods of the standing wave. The laboratory facility is equipped with a computer-animated model of the experiment, which is designed to render the wave effects that occur at different frequencies, and can be used to prepare for the laboratory work in the study of acoustic phenomena. Animation is synchronized with the experiment, which facilitates the perception of the physical processes and enhances the visibility of the processes.

The stand is accompanied with:

• a set of teaching materials and technical documentation intended for the teaching staff;
• a software.