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)

 

Here is a good video on the subject.

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

 

Where exactly do you want to cancel noise?

 

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.

 

How are they broken? Speakers, wire, or what?