Air Columns And Toneholes demystifies the "black art" of wind instrument making, replacing trial-and-error with a structured, physics-based workflow.
: The "art and science" of determining where to drill holes to achieve specific pitches. Effective Length
: For proper "harmonicity," the second resonance should be within about 10 cents of double the fundamental frequency. 2. Principles of Tonehole Design
The boundary conditions at the ends define the harmonic series:
When a key is opened slightly (not fully), the air column sees a tiny leak. This is used deliberately in :
A tonehole’s primary job is to shorten the effective length of the tube, raising the pitch. However, a tonehole is rarely a perfect "cutoff." The Lattice Effect
Opening a hole allows air to escape, raising the pitch.
: Covers advanced topics like undercutting (to improve stability and tuning) and the "filter" effect of tonehole lattices. Bart Hopkin Practical Resources for Makers