A Microphone Calibration Scheme for Cough Sound Analysis and Diagnosis

A self-calibration system implemented as part of an audio signal processing mobile app with dithering and digital filtering is presented for cough sound analysis and subsequent remote diagnosis of the type of cough cause, the cough itself can be due to different conditions such as chemical irritation, emphysema, pneumonia, bacterial or viral infection. The algorithm will produce a signal that normalizes the input cough sound irrespective of the type of smartphone used, the computed information makes analysis possible with audio signal collected from microphones produced by different manufacturers that may exhibit different sonic properties.