Abstract
It has been found that in a finished violin, the frequency spacing (ΔF) between the first cavity mode (A1) above the so‐called “Helmholtz air” mode and the first large‐amplitude mode (B1) of the violin body, particularly the top, provides a measurable clue to its tone and playing qualities. When this ΔF is greater than 65–70 Hz, violins have been rated by players as “harsh” and often “hard to play,” while violins with lower ΔF's are usually preferred. Methods of reducing this ΔF are being explored, particularly in the finished instrument. Prolonged vibration of several violins has caused a decrease of between 10–20 Hz in the frequency of the B1 mode, thus decreasing the A1–B1 ΔF. Experiments showing these changes will be discussed along with implications for long‐term violin playing and restoration practices.
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