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How to add noise to a mixture of signals?

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Quang Nguyen Dinh
Quang Nguyen Dinh on 1 May 2012
Hello. I am now using Audio Systems Array Processing Toolbox ( http://www.engr.uky.edu/~donohue/audio/Arrays/MAToolbox.htm) to simulates a system like this: some speech sources are placed inside a room, the signal is obtained by a triangle microphone array. However I don't know how to add noise to the signal obtained from microphone array to simulate specific SNR of 10dB, 20dB etc. of environment. Can anyone tell me how to do it? Thank you very much!

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Daniel Shub
Daniel Shub on 1 May 2012
http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer
http://www.mathworks.com/matlabcentral/answers/8626-how-do-i-get-help-on-homework-questions-on-matlab-answers
Daniel Shub
Daniel Shub on 1 May 2012
+1 because that is a cool looking toolbox that I didn't know about.

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