Development of beat frequency practicum device using Arduino UNO and AD9833 module

摘要

The practicum device of beat frequency has been developed. The device composes of the AD9833 module as an artificial sound frequency source, Arduino Uno as a control system, and application as the output's display. The module produces an adjustable frequency of sound in real-time. Then, these frequency sources are connected to an adjustable speaker stereo as the sound's output. The instrument available produces frequencies from 0.1 Hz to 2500 Hz with a stepping frequency of 0.1 Hz. Frequency calibration was carried out using a frequency audio counter in the frequency range of 300 Hz - 500 Hz. The maximum relative error of the first frequency source and the second frequency source is 0.01% and 0.008%, respectively. The beat frequency was observed using an audacity application in the 10 s and 15 s intervals. The smallest frequency that can be observed is 0.1 Hz. Validation by a media expert is carried out to determine the feasibility of the developed device. The assessment results were 95% of all aspects.