Analise da influência dos deslocamentos dos parafusos de afinação nas frequências de tambores percussivos

Abstract

The timbre of the instrument is an important characteristic that determines the way the music is interpreted by the listener, bringing out the distinct characteristics of each musician. The musician uses various instrument devices to produce the desired effect. The main objective of this work was to analyze the excited frequencies in drum drum membranes, adjusting the surface tension of the upper and lower membranes in different ways. The analysis was carried out experimentally, capturing the sound produced by membranes excited through a drumstick, through a microphone and audio card. With the help of software, recordings and analyzes of the sound emitted were made. Each analysis methodology served to understand the behavior of the frequency spectrum and the harmonics produced. In the equalization stage, the importance of membrane equalization for the formation of harmonics in the sound was noted. When adjusting the frequencies, it was determined that the adjustment of the lower embranes of the drum also impacts the increase in harmonics, requiring the same adjustment as the upper membrane. The theoretical determination of the frequencies of the vibration modes was not possible given the difficulty in determining the surface tension of the membrane, in addition to the non-ideal behavior of percussive drum membranes. [resumo fornecido pelo autor]