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head radius m — EMPIRICAL ESTIMATE
head surface mass kg/m^2 — EMPIRICAL ESTIMATE
target fundamental Hz — EMPIRICAL ESTIMATE
tone-bar length m — EMPIRICAL ESTIMATE
Bowed Frame Drum — EMPIRICAL ESTIMATES (not fabrication authority)
Membrane mode (EST)
freq Hz
nearest note
f01
130.0
C3
f11
207.1
G#3
f21
277.6
C#4
f02
298.4
D4
Tone-bar mode (EST)
freq Hz
nearest note
bar mode 1
32.4
C1
bar mode 2
89.4
F2
bar mode 3
175.2
F3
bar mode 4
289.7
D4
Implied head tension (EST)
1866.5 N/m
Membrane wave speed (EST)
73.0 m/s
Head f01 vs bar mode1 coupling (EST)
84.3 %
Coupling verdict (EST)
weak (>15%)