The app calculates the fundamental frequency of a sound with very high precision. The error in the frequency is less than 0.04%
The app plots the fundamental frequency versus time.
The application can be used to tune musicals instruments.
The app can be used to measure sound Doppler Effect: J.A Gómez-Tejedor, J.C Castro-Palacio y J. A. Monsoriu. "The acoustic Doppler effect applied to the study of linear motions", European Journal of Physics, 35 (2), 025006 (9pp), 2014. doi: 10.1088/0143-0807/35/2/025006. https://riunet.upv.es/handle/10251/38089. http://iopscience.iop.org/0143-0807/35/2/025006
More information about the App can be found in the reference: J. A. Gómez-Tejedor, J. C. Castro-Palacio and J. A.Monsoriu. "Frequency analyser: A new Android application for high precision frequency measurement". Computer Applications in Engineering Education (2015). DOI: 10.1002/cae.21618. http://onlinelibrary.wiley.com/doi/10.1002/cae.21618/abstract