Ezb Can Figure Out What Side Sound Is Coming From

mtiberia

Canada

Asked Nov 2014 — Edited Mar 2015

I used two DFB Robot sound sensors to give EZB sound localization.
These are analog sensors and I tweaked the RX analog values using EZ script to
determine which sensor was receiving a louder signal.

Regards

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VGosine

Trinidad/Tobago

#1 Nov 2014

this is awesome

now i guess you can have a robot follow you by your voice

Luis Vazquez

USA

#2 Nov 2014

Nice thanks for sharing

bhouston

Canada

#3 Nov 2014

@mtiberia. That's very cool! Can you share alittle more on how you did it and a link to where you got the sensors?

mtiberia

Canada

#4 Nov 2014

You can find the sensors at Robotshop, I had them for another project and decided to connect them to the EZ B.
The DFB Robot sound sensor is supposed to be powered by 5v but EZB supplies 3.3 on the ADC pins. You just have to adjust the sensors sensitivity to the highest and then use the EZ script to applify the incoming signals. There is a new sound sensor from Sparkfun that I would like to try and you can also find it on Robotshop's website.

Here's the script.

$Direction=0
$L=0
$R=0

:loop

Repeat($x,0,2,1)

# I multiplied the reading by 50 for both sensors

$Left=GetADC(adc0)*50
$Left_T=$Left+$L
$L=$Left_T

$Right=GetADC(adc1)*50
$Right_T=$Right+$R
$R=$Right_T

Sleep(10)

EndRepeat

$Direction=$Left_T-$Right_T

If($Direction>300)
SayEZB("left")
Sleep(1800)
$Direction=0
$Left_T=0
$L=0

ElseIf($Direction<-300) # that's -300
SayEZB("Right")
Sleep(1800)
$Direction=0
$Right_T=0
$R=0

EndIf

$Left_T=0
$Right_T=0
$L=0
$R=0

Goto(loop)