: - () - () .
, , - k = f (w). k , . . 20lg(k), .
, , . - , , . 20 / (. 10). ( 11).
. 10 | . 11 |
1. R1 R2 (1...100) , R 2/ R 1 < 3.
2. (. 11). ().
3. , - . () 20 .
4. . , . ( , ) (D t) . 1. , (f ) 20 200 , D t (45 ). , . 1. .
5. w = 2p f , k = A / A , 20lg(k), j. :
,
.
1. 20 lg(k) = f (w) j = f (w) (w ).
1
f , | , | , | D t, | w, /c | k | 20 lg(k) | j, |
220 |
6. (. 12). . . 5. . . 5.
|
|
.
. 12 | . 13 |
1. .
2. 1 .
3. 20 lg(k) = f (w) j = f (w).