Research has shown that the soundboard plays an increasingly important role compared to the sound hole, back plate, and the bridge\nat high frequencies. The frequency spectrumof investigation can be extended to 5 kHz. Design of bracings and their placements on\nthe soundboard increase its structural stiffness as well as redistributing its deflection to nonbraced regions and affecting its loudness\nas well as its response at low and high frequencies. This paper attempts to present a review of the current state of the art in guitar\nresearch and to propose viable alternatives that will ultimately result in a louder and better sounding instrument. Current research\nis an attempt to increase the sound level with bracing designs and their placements, control of natural frequencies using scalloped\nbraces, aswell as improve the acoustic radiation of this instrument at higher frequencies by deliberately inducing asymmetricmodes\nin the soundboard using the concept of ââ?¬Å?splitting board.ââ?¬Â Variousmathematicalmethods are available for analysing the soundboard\nbased on the theory of thin plates. Discrete models of the instrument up to 4 degrees of freedom are also presented. Results from\nfinite element analysis can be utilized for the evaluation of acoustic radiation.
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