This application report describes the working and operation of a modified version of the hardware and software described in the application report "A Simple Glass-Breakage Detector Using the MSP430" (SLAA351). This modified version is more robust, with comparable current consumption values to the simple glass-breakage detector. Hardware and software changes are made to the previous design to improve accuracy when detecting a valid glass breakage.
The robust glass-breakage detector includes an extra thud detection stage before actual glass-breakage detection. This avoids false triggering of the glass-breakage detector for sound events with signal spectrum similar to a glass-break sound. Hardware and software modifications made to the existing MSP430F2274 glass-breakage detector are shown in this application report.