Audio Frequency Detector

This project uses a sound detection module and detects the highest frequency sound to display it.

Hardware Required

Arduino Uno

Sound Detection Module

Breadboard                                

USB-A to B Cable                             

Jumper wires

 

Software Required

Arduino IDE

---

Develop your cicruit by makingt the connections as shown in the above figure.

Code

#include"arduinoFFT.h"

#define SAMPLES 128             

#define SAMPLING_FREQUENCY 2048 

arduinoFFTFFT=arduinoFFT();

unsignedint S_Period;

unsignedlong microSec;

doublevReal[SAMPLES];

doublevImag[SAMPLES];

voidsetup()

{

    Serial.begin(115200);//Baud rate for module is 115200

   S_Period=round(1000000*(1.0/SAMPLING_FREQUENCY));//Period in microseconds 

}

voidloop()

{  

    for(inti=0;i<SAMPLES;i++)

    {

        microSec=micros();   

        vReal[i]=analogRead(0);//Reads the value from analog pin A0

        vImag[i]=0;//imag term is to be 0

        while(micros()<(microSeconds+samplingPeriod))

        {

          //do nothing, just a delay

        }

    }

    /*FFT Samp0ling*/

    FFT.Windowing(vReal,SAMPLES,FFT_WIN_TYP_HAMMING,FFT_FORWARD);

    FFT.Compute(vReal,vImag,SAMPLES,FFT_FORWARD);

    FFT.ComplexToMagnitude(vReal,vImag,SAMPLES);

    /*Peak Frequency Detection*/

    doublepeak=FFT.MajorPeak(vReal,SAMPLES,SAMPLING_FREQUENCY);

    Serial.println(peak);     //Printing the result

    while(1);

}