What is the purpose of the resonator stringed instrument
my question is: What is the purpose of the resonator of a stringed instrument
The resonator of a string instrument is commonly an oddly shaped box or a wide thin board. The resonator is not sharply tuned; it responds to broad bands of frequencies and radiates sound at those frequencies from its entire surface area. The response of the body or soundboard is not flat within these bands, however, so some frequencies are transmitted more efficiently than others. These response peaks are called FORMANTS, and play a very important part in establishing the timbral identity of an instrument.
Since the tuning of the resonator is very broad, the string frequency is the controlling factor in the pitch of the instrument. (The string itself is a narrowly tuned resonator.) String frequency is controlled by adjusting tension for tuning and by manipulating length for performance. The formant frequencies do not change, so the waveform produced varies somewhat from one pitch to another.