Physics of the Bacon Internal Resonator Banjo

TL;DR

This paper investigates the physics behind the unique sound of the Bacon internal resonator banjo, analyzing how its design influences tonal qualities through comparative studies.

Contribution

It provides a scientific analysis of the internal resonator banjo's sound production, identifying key physics mechanisms responsible for its distinctive tone.

Findings

Resonator design contributes to mellower, richer sound

Physics mechanisms linked to sound complexity identified

Comparative analysis confirms design impact on tone

Abstract

The internal resonator banjo, patented and first sold by Fred Bacon around 1906, remains something of a cult favorite and is still produced by some independent luthiers. According to enthusiasts, the characteristic design elements produce a sound that is mellower, richer, and of greater complexity and presence than without them. Aspects of that sound are studied here, comparing instruments that are otherwise identical and identifying physics mechanisms that are likely responsible.