In the past, This experiment consisted on using a single speaker to generate a stationary acoustic wave through a glass pipe filled with water. The acoustic wave was generated with a special frequency using the function generator, at the same time the students could visualize this wave on the oscilloscope. The level of the water was lifted by moving up and down a plastic bottle, meanwhile they had to listen and try to define when the sound became louder, at that point they would measure the level of the water, defining this distance as a resonance node, which means they managed to place the level of the water in one of the nodes of the wave. Having the distance from the speaker to the water level, the students could calculate the speed of the sound, establish the resonance nodes for each frequency, and make graphs of the inverse of the frequency vs. the lengths of the nodes.

Using the Hp technology we replaced most of the Old devices that were used in this experiment the Old fashion desktop PC, the Oscilloscope, the function generator, even the ruler was replaced by the HP TabletPC.

This way we are able to reproduce the sounds, measure the amplitude and measure the distance from the speaker to the water surface.

While we change the level of the water the amplitude of the wave will be changing in a normal distribution making it harder for students to find the true maximum, leaving this calculation to a abstract perception.

With the new method using the HP TabletPC, we are now capable of measuring the maximum on the normal distribution, after we found this maximum we will be able to measure the distance of the wave length, giving us the data needed to calculate the characteristic of the acoustic wave.

Later on, this project will be expanded using a DC motor, to lift the water level just by clicking on the HP TabletPC, this way the whole experiment will be set, to create a new Virtual Advanced physic Lab.

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