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Fixed Price: Not Sure   |  Posted: Jun 30, 2015  |  Ends: 10d, 4h  |   7 Proposals
Hello all bidders, We are looking for a developer to join our team and help create a small but interesting sound FFT code that will be integrated into our system. The code eventually needs to be written in C,C++, objective-C or anything else that can be integrated into iOS/Android. Our electronic device will send ultrasound tones (17-20khz), you will need to filter out the surrounding noise and identify the tone frequency. For the development process we will provide the sample WAV file. A very rough method to do this would be to maintain a rolling average of the values for certain frequencies (FFT bins), and if a new value is much larger than the average, it's likely to be a tone. There are better ways however, that involve more precise measurement of the background noise, and calculate the signal to noise ratio. The end result should be a small API/BlackBox for 5-10 different pre selected identified frequencies. The logic: we take the ultrasonic ranges of 17000hz-19500hz and de...
Category: Mobile Applications       
Skills: Android, iPhone App Development       
Preferred Location: North America, Western Europe, Eastern Europe

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| s****dea
|    Israel
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