For this experiment the following equipment was obtained: mechanical string vibrator, string, standing wave holder, set of masses, and iMac wave generator software. String length was measured by a meter stick and its mass was measured with a digital scale. The string was tied into a knot at one end and was attached to the holder of the vibrator. Its other end was secured with a clamping pin attached to a pulley. The end of the string with the pulley had either a mass of 0.1kg or 0.2kg attached. When a weight was attached, the string was stretched with the weight on the pulley until taut and then clamped with the pin. In this manner, the string was set-up with closed-closed end positions. The string vibrator was connected to the iMac computer.
A mass of 0.1kg was attached to the string. The wave generator software on the iMac was then turned on. Initially, the frequency through the signal generator was adjusted until the minimum amplitude was found for its first harmonic. The signal generator was adjusted slowly to higher frequencies to obtain the maximum amplitude. Fundamental frequency was recorded at the frequency the first harmonic had appeared onto the string. The frequency was adjusted again to find the lower and upper bounds for the second harmonic and recorded. This process was repeated until the 10th harmonic. The recording of the first 10 harmonics as described above was then repeated with a 0.2kg mass attached to the string.