re pink noise tony wayne writes what is pink noise and how is it used in sound experiments tony pink noise is a random signal with more low frequency components than white noise if you look at the frequency spectrum of white noise at a frequency analyzer you will find that the spectrum power density is flat which means that every frequency is present in the noise signal often pink noise is obtained from white noise by integrating of low pass filtering a white noise signal therefore pink noise contains much more low frequency components the effect of pink noise is sometimes used to simulate thunder or roaring animals an additional low pass filter with variable cutoff frequency will explain you why enjoy it wouter
