Biblioteca de la Guitarra y Cuerda Pulsada

Biblioteca de la Guitarra y Cuerda Pulsada

Significant peak of guitar

 

A frequency response function (FRF) of a classicalguitar was measured. The input signal was a mechanical impulse at the bridge and the response signal was a sound pressure at 1 m from the soundhole. This resulted in a single FRF similar to the average of several FRFs where excitation was located at the different places on the soundboard. The excitation at the bridge FRF is a reliable measure of the acoustic properties of a guitar.The measured FRF showed a high degree of linearity and had a high value of the coherence function between 70 - 250 Hz. The first resonant peak of the FRF is a result of interaction of the soundboard air-backtriplet [1 - 3]. The first resonant peak showeda significant correlation with the loudness of six tones. This significant peak of the FRF can be used in measuring and modeling the guitar’s response with the aim to develop a procedure for optimizing the position of braces on the soundboard of the...

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