I want to generate a sweep signal sine wave in audio range (20 to 20kHz).

I have generated till 2kHz but after that the signal is getting distorted. How do I overcome it.

[Walter Roberson]

How are you generating the signal?

[Image Analyst]

Do you want a chirp?

chirp
Swept-frequency cosine
Syntax
y = chirp(t,f0,t1,f1)
y = chirp(t,f0,t1,f1,'method')
y = chirp(t,f0,t1,f1,'method',phi)
y = chirp(t,f0,t1,f1,'quadratic',phi,'shape')

Is that what you used? Maybe it's because you said you generated it only up until 2 kHz whereas your subject line said it's supposed to be until 20 kHz.

[Li Kang]

What do you mean by saying "getting distorted"?