Demonstration and analysis of acoustic interference using a “Quincke tube” and the arduine platform

This work presents an application of the classical Quincke acoustic interferometer, also known as “Quincke tube”. The equipment described in this paper was built with PVC pipes and commonly used plumbing accessories. As a sound source, we used a conventional speaker that are connected to a notebook was used for the generation of sine waves controlled by the GoldWave software. To measure the intensity of the sound we use the KY-038 sensor and Arduino platform. The purpose of this equipment is support for educational activity, due to limited teaching and learning resources involving mechanical waves, especially the interference study in high school. Through the acoustic interferometer, it was possible to calculate the wavelength of different frequencies and from that to determine, with good precision, the speed of sound in the air.

Keywords
Acoustic interferometer; Quincke tube; Arduino