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  1. L

    Detection of the sirens of priority vehicles (police, ambulance, fire brigade...)

    Hello, I'm using a Teensy for a project. My project is to use a microphone to detect the sirens of priority vehicles (police, ambulance, fire brigade...). I've tried programming, but it doesn't work... I don't know what to do... Can you help me? For your information, in France, the 1st tone...
  2. L

    Problem of filtering a signal

    Hi, You can see the program in my co-worker's post below, thank
  3. L

    Problem of filtering a signal

    Hi, Our project consists in recognizing an alarm thanks to the Teensy. We managed to recognize the frequencies and therefore characterize the alarm but for a better result, we want to filter the signal. We managed to filter the signal but when we perform the FFT, the teensy does not recognize...
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