​
head effective diameter (mm) — ESTIMATE
760
membrane surface density (kg/m^2) — ESTIMATE
1.2
target fundamental f01 (Hz) — ESTIMATE
50
Bass Surface Drum — Acoustic & Frame Estimates
All values are EMPIRICAL ESTIMATES — pending prototype measurement.
Required rim tension (ESTIMATE)
2957. N/m
Total radial frame pull (ESTIMATE)
7061. N
Frame ovalization, worst bound (ESTIMATE)
9135.30 mm
Frame ovalization, best bound (ESTIMATE)
1827.10 mm
Within 0.5 mm budget (best bound)?
NO (estimate)
Predicted Bessel modal frequencies (ESTIMATE)
mode (m,n)
alpha
freq Hz
ratio f01
(0,1)
2.4048
50.
1.
(1,1)
3.8317
79.7
1.593
(2,1)
5.1356
106.8
2.136
(0,2)
5.5201
114.8
2.295
(3,1)
6.3802
132.7
2.653
(1,2)
7.0156
145.9
2.917
(4,1)
7.5883
157.8
3.155
(2,2)
8.4172
175.
3.5