: , , , . , , , . - , .
(, , ), ( , , ).
(L λ), . . (L λ), . 340/. , (f min = 16 ), λm = 22 , ( 20 ) λmin = 0,017 . (300 2000 ) 1 .
.
.
, , . , , , , .
L, . V. . , . λ/2, (L = m λ/2), , λ =2 L / m (m = 1, 2, 3 ). λ = V/f, :
f = V /λ = mV/ (2 L). (4.1)
:
(4.2)
F, d, ρ , . (4.1), :
m = 1, 2, 3 (4.3)
|
|
f 1 (m = 1) . , f 1, .
4.1 , (m = 1) .4.1, (m = 2) .4.1, (m = 3) .4.1.
. , . , . , , .
, . , , , , .
, , :
(4.4)
T (/), σ (/2), b , m n . 4.2 .
4.2