4.3. Acoustic compliances
In Eq. (2.72) we showed that a length of tube, rigidly closed on one end (x
=
0), with a radius in meters greater than
(so that the sidewall friction can be neglected) and less than 10/f (so lateral standing waves are not present) has an input acoustic impedance at the open end equal to


where Z
A
=
Z
s
/(πa
2), ρ
0 is density of the gas in kg/m3, c is speed of sound in m/s, a is radius of tube in m, k is wave ...
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