Sound or music is produced by this hollow wooden chamber. The type of wood a mandolin is made of plays a big part in the tone it will produce. Typically the top of the mandolin is made of spruce while the back and sides are made of rosewood, maple, birch or mahogany.What is an octave band analysis?
octave-band analyzer. A portable sound analyzer which amplifies a microphone signal, feeds it into one of several band-pass filters selected by a switch, and indicates the magnitude of sound in the corresponding frequency band on a logarithmic scale; all the bands except the highest and lowest span an octave in frequency.