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Sound Detection with MSP430

Alberto Soattin
Genius 16905 points
Other Parts Discussed in Thread: MSP430F2274

Hi Support,

my customer is looking on how to identify sounds (glass break) with MCU.

As far as I understood they have got some demo where sound is sampled and converted to some coefficients and compared with trained set of coefficients.

I would like you to verify whether MSP430 group has something specific that we could leverage: demo and something concrete where we could let them play with.

My understanding is that my customer is testing an algorithm (developed by 3rd parties) that probably runs on some microcontroller.  

I think that we should look for algorithms, digital filtering, neural networks that MSP430 experimented/proved they can fit with glass breaks detectors.

For instance; http://www.ti.com/tool/msp-speech-recognizer (this might get in the direction that we are aiming for).

Can you kindly support me in this kind of application?

Thanks and regards,

Alberto

 

 

  • 0
    Guru 243220 points

    You did not mention these:

    SLAA351: A Simple Glass Breakage Detector Using the MSP430

    This application report describes a simple glass breakage detector using the MSP430F2274 ultralow-power microcontroller. The algorithm is based on the spectral analysis of a typical glass breakage signal. The input signal spectrum, limited to a frequency of 20 kHz, is processed for a valid glass breakage. Various signal characteristics such as peak content, number of zero crossings, and frequency composition are analyzed. Real-time signal processing is achieved by implementing and using a low-order bireciprocal lattice wave digital filter (LWDF). A glass breakage alert is indicated by an onboard buzzer and an LED. The entire setup is designed to operate at low power, allowing long battery life.

    SLAA389: A Robust Glass-Breakage Detector Using the MSP430

    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.

  • 0
    Genius 3155 points
    Do you know about this application note www.ti.com/.../litabsmultiplefilelist.tsp ?
    Digital filtering and the like is done in firmware (mainly coded in the attached assembly files).
    Schematics/layout of demo hardware is provided too.

    Regards,

    Peppe

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