ABSTRACT
Spectrum Analyzer CHAPTER OUTLINE 1/1 or 1/3 Octave ....................................................................................................................201 Analog or Digital.....................................................................................................................202
In the analysis of sound, it has always been important to be able to describe the
frequency content of a signal. The traditional method is to use a filter bank,
containing a number of filters with relative bandwidths, for example 1/1
octave, 1/2 octave, 1/3 octave, or perhaps with narrower bandwidths depending
on the purpose. The signal being filtered passes through one filter at a time.
Once the signal for a filter has been detected and its value read or printed,
the next filter is reviewed.
