The zero-crossing rate (ZCR) is the rate of sign-changes along a signal, i.e., the rate at which the signal changes from positive to negative or back.
Run the 'ZCR_application.m' file. It will upload the audio file 'sample.wav' and will plot three plots (ZCR, Hamming windowed and energy).
Written by Adrià Romero López.
Date: April 18, 2016
Institution: Polithecnical University of Catalonia (UPC) - Barcelona Tech