Big or Small soundSensor

Projects General Guidance
1

Can anyone help me please to get the frequency of a sound using a simple soundsensor and not a microphone? Is there any mapping formula to get the frequency from the values of the sensor?

2

There is no "simple" way to get the frequency content of a sound. Google "Fast Fourier Transform" to see one way to do it. There are FFT and FHT libraries available for Arduino. Or do you want to detect if one certain specific frequency is in the sound?

3

Not a microphone? A trigger type sensor explicitly blocks frequency content.

4

Yes i want to detect if one certain specific frequency is in the sound

5

Then a hardware solution might be easier. An LM567 Tone Decoder can be set up to detect a certain frequency and signal the Arduino when that frequency (actually a narrow band around the frequency) is in the sound.

6

Okay thanks a lot

7

sound using a simple soundsensor and not a microphone?

I'm not sure what you mean by that... A microphone is needed to convert acoustic sound waves to an electrical signal. A [u]Microphone Breakout Board[/u] has a mic, a preamp, and some other circuitry to make it work with an Arduino.

And, what do you mean by "big or small"?

Yes i want to detect if one certain specific frequency is in the sound

Before you get too deeply into [u]FFT[/u], etc., I suggest you download [u]Audacity[/u] and record the sound(s) you're interested in. Then in Audacity go to Analyze -> Plot Spectrum to look at the frequency spectrum. All natural sounds contain multiple-simultaneous frequencies so this kind of thing gets complicated