Closed Tube - Resonance of A Sphere of Air (Vented)

Resonance of A Sphere of Air (Vented)

The diameter of a sphere with a sound hole is given by

where: (in meters)

D = diameter of sphere
d = diameter of sound hole
f = frequency


The diameter of a sphere with a necked sound hole is given by

where: (in meters)

D = diameter of sphere
d = diameter of sound hole
C = speed of sound
L = length of neck
f = frequency


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