Matlab code for determining instantaneous heart rate from audio signals of nesting birds

Matlab source code of signal processing methods to determine the instantaneous heart-rate from an audio recording made with a bird sitting on a plastic egg fitted with a wired microphone. These files are to accompany the conference paper:

Carl Q. Howard, Jarrod C. Hodgson, and Lian Pin Koh (2018), "Heart rate measurement of nesting birds using a microphone in a plastic egg", Australian Acoustical Society Annual Conference 2018, Adelaide, South Australia, Australia, 6-9 November.