End conditions of piano strings

TL;DR

This paper presents a method to validate input admittance measurements of piano string end conditions using high-resolution signal analysis on a simplified experimental setup.

Contribution

It introduces a validation technique for admittance measurements and demonstrates its implementation on a simplified string-beam system.

Findings

Effective validation of admittance measurements achieved

High-resolution signal analysis provides accurate estimates

Method applicable to simplified and real piano strings

Abstract

The end conditions of piano strings can be approximated by the input admittance at the bridge. Proper measurements of this value are therefore required. A method of validation of admittance measurements on simple structures is proposed in this paper. High resolution signal analysis performed on string vibrations yields an estimate for the input admittance. This method is implemented on a simplified device composed of a piano string coupled to a thin steel beam.