J . Pakarinen , H . Penttinen , and B . Bank , 2007 , Analysis of handling noises on wound

This study analyzes the handling noises that occur when a finger is slided along a wound string. The resulting noise has a harmonic structure due to the periodic texture of the wound string. The frequency of the harmonics and the root-mean-square amplitude of the noise were found to be linearly proportional to the sliding speed. In addition, the sliding excites the longitudinal modes of the string, thus resulting in a set of static harmonics in the noise spectrum. The sliding excites different longitudinal modes depending on the sliding location.