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pink noise generator
 
 
 

Application note # 6
Sample Champion

 

MLS and pink filter. Why use it?

In some circumstances, it could be useful to have a pink noise generator, especially when an octave or third-octave frequency analysis is required. Sample Champion can pink-filter the MLS signal. Here below there are some examples (with "loop back" configuration).

 

Figure 1 - "Flat" impulse response

 

Figure 2 - "Flat" frequency response from the
impulse response plotted in figure 1

 

Figure 3 - Third octave analysis of the "flat" frequency
response plotted in figure 2; the difference between
adjacent 1/3 octave bands is equal to 1 dB

 

Figure 4 - Impulse response measured in the same conditions of figure 1, but using a pink-filtered MLS signal

 

Figure 5 - Frequency response from the
impulse response plotted in figure 4

 

Figure 6 - Third octave analysis of the frequency
response plotted in figure 5

 

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