#
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Help

Helmholtz Number


where: H_n = helmholtz number; k = wavenumber [m^-1]; a = duct radius [m]

The plane wave cut-off frequency is when the Helmholtz Number is of the order of 1.84

See also: Cutoff Frequency, Wavenumber.

Subjects: Noise & Vibration