I have two questions concerning sound sensor that have come up.

1. I am wondering if the wifi  is causing variations with sign wave on my Ez-b ADC Graph.  If you look at pictures at top you will see the difference between a sound generator and ADC Graph.  The sound Generator provides a solid tone same height signal.  It should cause the ADC Graph to show a solid voltage. What is going on? Am I wrong in my assumptions.

2. I am looking at doing triangulation Location using time difference to calculate location of sound.  Where are the calculations of received signals calculated?  Will this work with this setup or do I need to have an on-board computer to eliminate WiFi slowdown.

@Ellis

1. Yes, you are wrong in your assumptions Radio signals (wifi) and sound waves (sine waves in your case) are not even in the same ballpark as each other... I cannot see them interfering with each other

2. It's kind of difficult to understand what you want to do sometimes as you seem to not quite understand it yourself.... Saying that you are way over complicating things.... You can easily calculate where the sound is coming from (left, right, centre buy using 3 cheap sound sensors) and a couple of lines of code... However if your goal is also to calculate range from the sound source you will need to buy some expensive sound hardware and have ptp write code for you.... In other words, forget it and just use a ping(s) in conjunction with your sound sensors to measure range...

FYI 3.3v - 5v Sound sensor This one worked for me no problem....

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It's kind of difficult to understand what you want to do sometimes ..

Usually I aim for the most complex stuff and sometimes there is a simple solution for the problem and I miss the point

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I would like it to act like my Amazon Echo which with led's show where the sound is coming from.

DJ:

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Ptp, he’s merely trying to identify the direction of a sound.

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I believe others who determined the direction of sound may have used the sound movement control: https://synthiam.com/Products/Controls/Scripting/Sound-Movement-16110

Tony Elis: https://synthiam.com/Community/Robots/Altair-Robots-In-Servo-Magazine-294/comments Did something similar. He used simple sensors (analog microphones) and code a firmware in a PIC micro-controller to capture the adc levels and his firmware dispatches the feedback direction to the ARC.

If you want something out of the box I would recommend Sound-Movement control or Richard's idea.

If you want something more elaborated/fancy I would try a hardware solution: https://www.seeedstudio.com/ReSpeaker-Mic-Array-v2-0.html I believe there are some python scripts to grab the DOA angle, and other relevant information, but, you will need to take the risk of getting the board test and ask the vendor for windows support.

Sometime ago, I built something with Playstation eye cameras they have 4 microphones, and I've explored some sound algorithms on Linux, the idea was to have a cheap device Raspberry PI Zero with a PS Eye streaming audio plus DOA, and other stuff. I got mixed results, most of academic papers are complicated, and I forgot most of the college math, it was a pain and unfortunately during that time it seems not useful to me...  I would love to port the code to windows, put the time is a constrain, and I spend most of my day coding so it's difficult to get the energy to code more.

:loop
$left=GetADC(adc0)
$middle=GetADC(adc1)
$right=GetADC(adc2)

if ($left>$middle)

  if ($left>$right)
    servo(D0,1) // left is highest
    sleep(2000)
goto(loop)
  endif
  
endif

if ($middle>$right)
  servo(D0,90) // middle is highest
ELSE
  servo(D0,180 // right is the highest
endif

sleep(2000)
goto(loop)

I just whipped this up quickly and is untested... I am sure it can be done with fewer lines of code but I am multitasking at the moment... It is obviously meant to work with 3 sound sensors....

Thanks to all of you.

I agree with simple.  I have been trying to make it simple but it hasn't worked.  I have been using sound sensors for location.  I have tried DAOKI Sound Microphone Sensor Detection Module and RobotDyn sound sensors both with digital and analog pins.  I am using the analog pin.  The response I get can be seen on the above pictures.  The graph is all over the place.  I do not know if this is the problem.

What really happens is the graph will jump from 0 to 64v instantly then right back to 0.  This continues to happen but with different voltages except they mostly peak from 64-65 volts no matter how loud the audio is to the speakers.  This is mostly a one volt variant.  The information is useless to sense sound volume because you can not compare which microphone is louder.

This is why it looks like I am all over the place.  All I want to do is collect sound from three microphones, use a program to process microphone info and make decision where the sound is coming from and turn robot head in that direction so it is looking at where the loudest noise is coming from.

Richard I will try the code.  I looks good for finding loudest microphone.  I hope the information I am getting to the app is the right info.

Thanks

I still feel like this is a gain issue. Because a sound should be louder based on the direction of the microphone. With no sound in the room, the microphone shouldn’t be returning much voltage on the adc wire.

I’m assuming the sensor shares a common ground with the Ez-b? And maybe it does require a pull down resistor on the signal wire? What’s the data sheet show?

DJ you might be right.  I did adjust the gain to see if it would help it work.  I will work on that some more.  Also it does share ground with the sensors and it did not work with or without resister.

Also above Richard showed some script I am going to try and just skip the controls.

I will let you know how that comes out.

Thanks for your interest.