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turning a robots head towards your voice

skypickle

Just as the amazon echo has an led ring that points to the source of your voice, i would like to drive a stepper motor that turns the robots head.

 

As this would require a far field microphone array, i have found two boards that offer this functionality

 

The respeaker microphone array

https://www.amazon.com/gp/product/B071S2ZMSQ/ref=ox_sc_act_title_2?smid=A1YP59NGBNBZUR&psc=1

 

the matrix creator

https://www.matrix.one/products/creator

 

So although

I have basic arduino/rasbPi experience, I have no real hardware expertise. The speaker would require purchase of the core unit as well so it would be somewhat more expensive. But I do not know how to compare these two hardware platforms.

Has anyone any familiarity with this hardware?

Has anyone seen this problem solved before (so I dont need to reinvent the wheel)?

 

I have investigated 'homegrown'solutions using individual mics whose signals are compared and using phase differences to determine a direction(the mic closer to the sound source gets the signal sooner). However, this is not accurate when identifying a sound impulse and requires a continuous or repeating sound.

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  • I don’t know how accurate you want to be, or your programming experience, but I‘d be tempted to try 3 microphones in a triangular arrangement, each feeding a basic peak hold circuit with quite a slow release rate, and using those 3 peak held signals as inputs to trigger interrupts. The interrupt that comes first would indicate the direction to turn towards.

     

    The peak hold is intended to slow down the rate of interrupting, so I’d go with it decaying over say 200ms or so.

     

    it might be a bit too crude for your purposes, but it would be reasonably simple to put to the test I’d think?

     

    A

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  • I don’t know how accurate you want to be, or your programming experience, but I‘d be tempted to try 3 microphones in a triangular arrangement, each feeding a basic peak hold circuit with quite a slow release rate, and using those 3 peak held signals as inputs to trigger interrupts. The interrupt that comes first would indicate the direction to turn towards.

     

    The peak hold is intended to slow down the rate of interrupting, so I’d go with it decaying over say 200ms or so.

     

    it might be a bit too crude for your purposes, but it would be reasonably simple to put to the test I’d think?

     

    A

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