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About Kinect Inner Structure; Microphone Array RRS feed

  • Question

  • (In Beginning, I am sorry about my bad English.)

     

    I have question about kinect Inner Structure.

    there are four MicroPhone.

     

    1. Does each microphone have differences? (only position difference?)

     

    2. microphone is placed, rate 1:3, why? (Left side is one microphone, Right side is three microphone.) is any reason to place like that?

     

     and Thank you. I hope you to be happy everyday.

    Tuesday, October 4, 2011 7:35 AM

Answers

  • As far as I know all the microphones are identical. Seems to me that they have to be identical to use them accurately for SoundSourceLocalization.

     

    As for the placement, I can't say why they did it but I can say that it is good to have at least 1:3 or 2:2 and not 0:4 placement. Having a "larger" distance between the 1st microphone and the others allows the user to see a difference between the inputs in terms of delay of sound.

    When a sound comes from the side there is an approximate delay of up to 7 samples between the left most microphone and the centre microphone(at 16khz).

    Hope this helped you in any way.

     

    What I would have liked is a higher sample rate on the recording.... ( > 16khz)


    Tuesday, October 4, 2011 9:29 AM

All replies

  • As far as I know all the microphones are identical. Seems to me that they have to be identical to use them accurately for SoundSourceLocalization.

     

    As for the placement, I can't say why they did it but I can say that it is good to have at least 1:3 or 2:2 and not 0:4 placement. Having a "larger" distance between the 1st microphone and the others allows the user to see a difference between the inputs in terms of delay of sound.

    When a sound comes from the side there is an approximate delay of up to 7 samples between the left most microphone and the centre microphone(at 16khz).

    Hope this helped you in any way.

     

    What I would have liked is a higher sample rate on the recording.... ( > 16khz)


    Tuesday, October 4, 2011 9:29 AM
  • Oh, Thank you so much about your answer.

     

    I think it more,  after reading your answer.

     

    my realization is that left single microphone is for standard.

     

    It is better to see picture below.  

     

     

     I am not sure this is right.


    • Edited by _yi Monday, October 10, 2011 10:12 AM
    Monday, October 10, 2011 10:04 AM
  • About Kinect structure.

     

    see the Kinect then compare the size with your face;

     

    camera's gap is almostly same with your eye's gap;

     

    microphone's gap is also like your ear's gap.

     

    and microphone is inside like your ear's diaphragm is inside.

     

    it can make a source's flow same direction.

     

    MS step into human robotics directly by Kinect;

     

     




    • Edited by _yi Wednesday, October 12, 2011 8:48 AM
    Wednesday, October 12, 2011 8:44 AM