Kundt tube with analog outputs

The Kundt tube is designed to study the deformations of a column of air in which sound waves are produced. The apparatus consists of a plastic tube mounted on a stand with a speaker at one end and a removable plug at the other. The speaker is powered by a function generator (not provided) that allows the frequency of the sound wave to be varied. The amplitude of the sound signal is captured by an electret microphone mounted on a movable rod inside the tube. The movement is done manually by a rotary knob. The displacement and received signal are recorded on a computer using any ExAO system. An oscilloscope can also be used to visualize the received signal. Measurements can be made with the tube open or closed. The user can then record the raw signal or the envelope curve of this signal.