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( active noise control using loudspeaker )

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Actually I have project to cancel noise ( active noise control using loudspeaker ) and my signal processing is labeled and am using labeled 2011  I want to squire signal from speaker that is connected to signal generator and the parameters of this signal want to send it out to loudspeaker connected to the laptop so it can cancel eachother and no sound detected >>> i have used DAQ to eliminate the delay as I worked before without DAQ and there was delay  >>> now when the signal came out to the canceling speaker isn't match with the signal that is generated >>>>>I want to make the signal out of phase 180 so that it can cancel >>>>> I hope if u can help me i will appreciate this very very much  thanks again 
 


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