Active noise cancelling

Discussion in 'General Electronics Chat' started by cooltafel, Mar 20, 2018.

  1. cooltafel

    Thread Starter New Member

    Mar 20, 2018
    2
    0
    Hello,

    Can somebody help me?
    I am searching for some good noise cancelling circuits.
    I browsed the internet and found couple of projects, but those aren't the real thing.
    For example: http://www4.ncsu.edu/~rsmith/MA574_S15/silence.pdf

    The experts (manufacturers) use the BT chip csr8645.
    I know the chip has the possibility to cancel noise. https://www.qualcomm.com/products/c...lQTIlMjBhdWRpbyUyMHRlY2hub2xvZ3klMjIlNUQlN0Q=

    Could someone help me finding a circuit?

    Thanks in advance!

    (other good ideas for noise cancelling circuits are welcome)
     
  2. -live wire-

    Active Member

    Dec 22, 2017
    828
    72
    Here is a good video on the subject.

    It is very difficult, so maybe go with more passive noise cancellation. Or just....
     
  3. crutschow

    Expert

    Mar 14, 2008
    20,040
    5,637
    Where exactly do you want to cancel noise?
     
  4. cooltafel

    Thread Starter New Member

    Mar 20, 2018
    2
    0
    Thanks for the replies.

    I have already seen the video's from electroboom. Very interesting.

    I would like to make active noise cancelling for my broken headphones. I thought recycling is a good idea.

    The problem is that I cant find any circuit for the csr8645 chip for ANC.
     
  5. -live wire-

    Active Member

    Dec 22, 2017
    828
    72
    How are they broken? Speakers, wire, or what?
     
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