3.4 Signal Analysis

This portion of the software implements the methodologies used to detect a glass breakage. The signal analysis is split into two parts. The first part of the signal analysis is done every sample and is completed before the arrival of the next sample. The second part of the signal analysis is done on 60 ms of the incoming data that has passed through the first stage of the signal analysis. This is not done on a sample-by-sample basis, but over 2336 samples that correspond to 60 ms of the incoming sample. The duration of 60 ms is not based on any requirement of the algorithm but was chosen as a convenient number for efficient processing.