1 reply to this topic

[mohammad]

Hi,

 

Is there anyone who has already worked with Electret Micrphone Sensor? I need to detect the noise in my room, so I wired the sensor simply to my Netduino Plus (5v, GND, Analog Pin 0), and I am getting random values (70 to 130) which are independent to the existing noise.

 

-My code:

    public class Program    {        public static void Main()        {            SecretLabs.NETMF.Hardware.AnalogInput inp = new SecretLabs.NETMF.Hardware.AnalogInput(Pins.GPIO_PIN_A0);                        while(true)            {                Debug.Print(inp.Read().ToString());                Thread.Sleep(100);            }            }    }

[mohammad]

According to the comments on the Sparkfun page https://www.sparkfun.com/products/9964, [color=#008000;]I could solve the problem[/color]. Somebody recommended to write a tight loop (e.g. 100ms) to get the min and max values. The difference between the two will give us the volume (sound pressure) during that time.