To create an app that monitors audio for tone pulses of approximately 2 to 8ms in duration and store the start time in a queue. The app would have a separate thread to process this queue looking for 4 pulses within a 300ms period, measuring the three intervals between and using them to look up a corresponding ID number.
The user interface will be simple with a few setup parameters and a simple display of the code number each time a valid signal is detected.
Technical skills are required. The Freelancer must have some experience with signal analysis and understand the concept of A/D sampling and calculating average power of that signal in small blocks of time. If you understand the concepts on this page, you should have the background needed.
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If you have the technical background and experience with Android, this project should be fairly easy.
Please mention your signal processing experience in your proposal.
10 freelance ont fait une offre moyenne de 1325 $ pour ce travail
Hello, I am interested in your project. I have realized project on the Android ultrasound transmission of digital information. I know how to digitize audio, digital signal processing, spectrum, filtering.
I deal with dsp systems more than 30 years. My skills include linear and non-linear processing - filtering, spectrum analysis, parametric and non parametric statistical methods