add white noise to my voise

[sara_s]

hello
I want to add white noise to my voise ( in matlab)
but I don' know how ?

pls help me
thanks

 

[JoannesPaulus]

you can use the randn function:

noise=sigma*randn(1,N);
where N is the length of your data.

 

[ashwini1]

type 'help awgn' on command prompt

 

[sara_s]

thanks for youre help
but my problem is any thing else !

I have white noise(downloaded from internet)
and I want to add white noise to my voice(that is 2 secend)
these are diffrent in length ,
how can I do this?

thanks indeed

 

[JoannesPaulus]

let's say that v is voice and n is noise. what you want to do is vn=v+n but length(v) is different from length, correct?
let's say that N=min(length(v),length), than you can do vn=v(1:N)+n(1:N).

I hope this help!