Journal of Applied Embedded Systems


Cloud connected acoustic vibration sensing combining the Zephyr RTOS, digital signal processing and bare metal programming techniques.

Cloud connected acoustic vibration sensing combining the Zephyr RTOS, digital signal processing and bare metal programming techniques.

In this paper, we will explore a battery power acoustic machine monitoring design built using the Nordic NRF9160 and the Zephyr real-time operating system (RTOS). We’ll demonstrate how to get to the “metal” and optimize low-level peripheral, digital signal processing, and efficient data packing for transmission to a cloud backend. All while leveraging Zephyr's high-level abstractions and build system that enable rapid application development and software lifecycle management.

What is Wavenumber?

What is Wavenumber?

I often get the question "Wavenumber....never heard of that one before! What is it?". It does seem like a word not common in the day-to-day lexicon. My observation is that even people with science and engineering background have either never heard about it or have a substrate-level understanding of it. Here we will learn about wavenumber using its trendier cousin frequency.

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