say,

overall noise figure =f

noise figure of stage1=f1

noise figure of stage2=f2

f=f1+(f2-1)/g1

f1,f2 are in linear scale(not in dB)

g1=gain in stage1

Pink noise is noise in which the spectrum density is proportional to inverse of the frequency. It is also known as 1/f noise.

Check the following for details:

http://en.wikipedia.org/wiki/Pink_noise

- Neeraj Sharma

examples of internal noise.thermal noise,short noise,i/f noise

F. M. Kessler has written:

'Noise control' -- subject(s): Pile drivers, Noise, Noise control, Piling (Civil engineering)

Randall F Barron has written:

'Industrial noise control and acoustics' -- subject(s): Noise control, Industrial noise, OverDrive, Engineering, Nonfiction