Sound field radiated by a rod

TL;DR

This paper investigates the acoustical intensity field emitted by a vibrating cylindrical rod, developing a semi-analytical model that accurately predicts the three-dimensional sound radiation pattern based on symmetry and experimental validation.

Contribution

It introduces a simplified theoretical wave equation for the radiated sound field from a vibrating rod, validated by experiments, enhancing understanding of cylindrical sound radiation.

Findings

Semi-analytical solution matches experimental data

Cylindrical symmetry simplifies 3D field reconstruction

Effective modeling of sound radiation from a vibrating rod

Abstract

We study the acoustical intensity field radiated by a thin cylindrical rod vibrating in its lowest compressional mode. Due to the cylindrical symmetry, the emitted field is measured in a radial plane of the rod which is sufficient to reconstruct the full three-dimensional field. Starting from the one-dimensional approximation of the excited compressional mode, we develop a simplified theoretical wave equation which allows for a semi-analytical solution for the emitted wave field. The agreement between the experimental results and the semi-analytical solution is eloquent.