Bridge Experiments
Geoff Burghardt Geoff Burghardt

Bridge Experiments

experimenting with specie, geometry and mass in different bridges on the same mandolin.

Read More
Mystery Resonances
Geoff Burghardt Geoff Burghardt

Mystery Resonances

An odd peak shows up when you blow across the ff-holes, I think I have an idea on what causes it and potentially how it can be manipulated…

Read More
Ten Easy Tone Options
Geoff Burghardt Geoff Burghardt

Ten Easy Tone Options

Sometimes you don’t need a new mandolin to get new tone. Play around with these options!

Read More
My First Experimental Result
Geoff Burghardt Geoff Burghardt

My First Experimental Result

In retrospect a duh-moment, but at the time I figured out, on my own, why certain resonances changed when the strings were on vs when they were off. Felt pretty good…

Read More
Deflection Intro
Geoff Burghardt Geoff Burghardt

Deflection Intro

A little detail on my process and my why for collecting deflection data.

Read More
Curiosity meets Resonance, part 1
Geoff Burghardt Geoff Burghardt

Curiosity meets Resonance, part 1

An exploration into FFT and the shapes of FFT graphs of the sound created by different materials and objects. An attempt to tie the visual with the audible, in a way to make more sense of the audible.

Read More
Mandolin Measurement Project Overview
Geoff Burghardt Geoff Burghardt

Mandolin Measurement Project Overview

The main gist of what my measurement project is attempting to learn with mandolins and tone, with a tag-on goal of figuring out what to do with it once it’s sorted out.

Read More

As of 2/7/2025 I have measured136 ff-holed mandolins from the following 38 builders:

Andersen — Bourgeois — BRW — Campanella — (Austin) Clark — The Colfax (Baxendale) — Collings — Eastman — Elkhorn — Flatiron —Gibson (including 1 Loar) — Gilchrist — Hagerty — Harris — Heiden — Hillburn — Hutto — Ibanez — iii — Iwamoto — J. Bovier — Kentucky — Klos — Ludewig — Millard — Northfield — Nugget — Old Wave — Ome — Passernig — Pava — Silverangel — Tailwater — The Loar — Turkey Creek — Wade — Weber — Wildflower