i have problem with concept in labview

[ALI2020]

i have project active noise control using loudspeaker to cancel the noise i have problem with the cancellation any suggestion i will apperciate that . the code attatched if u could see and tell me what is the wrong thanks in advance

[GerdW · Accepted solution]

Hi Ali,

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i have problem with the cancellation

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What kind of problem(s)? Could you describe them a little bit more detailed?

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what is the wrong

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Definitely "wrong" is that part of your code:

Why dou you need 4 functions where a simple IndexArray will do the very same job? (That programming style is called Rube-Goldberg...)

[ALI2020]

 thank you very  much for ur reply
actually i have project to cancel noise ( active noise control using loudspeaker ) and my siganl processing is labview and am using labview 2011 
i want to aquire signal from speaker that is connected to signal generator and the paramters 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 eleminate the delay as i worked before without DAQ and there was delay  >>> now when the signal cames out to the cancelling speaker isnot match with the signal that is genertaed >>>>>i want to make the signal out of phase 180 so that it can cancel >>>>> i hope if u can help me i will apperciate this very very much 
thanks again 

[ALI2020]

hi 
is there functions in labview to cancell delay ? is there any code that can help me cancel noise rather than the one i attatched as i am not expert in labview? i only know that if i can make phase shif from theory t and i donot know even how to do this in labview ?

[johnsold]

Duplicate thread.   Please keep the discussion in the linked thread.

Lynn