The impact of materials type used to excite a cello strings on its sound

The aim of this paper is the impact of popular textile materials used to excite cello strings on its sound and compare it with the sound obtained using a bow. The sound-generating mechanism was designed and manufactured to allow for the regulation of the tension of the selected material, similarly to the tension of the horsehair in a cello bow. The mechanism allows for the generation of sound in a continuous manner, ensuring repeatability. The influence of individual materials used to excite cello strings was determined based on acoustic measurements using a multi-channel recording system. The paper presents the spectra of the cello sound and determines the spectral centroid, which is a decisive parameter related to the timbre of the instrument.