:

:

 

26 2008 . N 62-

 

 

 

,

,

 

Noise of machines. Determination of sound power levels

radiated into a duct by fans and other air-moving devices

using in-duct method

 

31352-2007

( 5136:2003)

(ISO 5136:2003, MOD)

 

34

 

17.140.20

 

1 2008

 

 

, 1.0-92 " . " 1.2-97 " . , . , , , ".

 

 

1. "- " , 4.

2. .

3. , ( N 32 24 2007 .).

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4. 5136:2003 ". , . " (ISO 5136:2003 "Acoustics-Determination of sound power radiated into a duct by fans and other air-moving devices - In-duct method"). , , . 5136:2003 L.

1.5 ( 3.5).

, K.

43 "".

(en).

, K.

- (MOD).

5. 26 2008 . N 62- 31352-2007 ( 5136:2003) 1 2008 .

6. 12.2.028-84 , .

 

( ) " ".

" ", - " ". " ".

 

1.

 

1.1.

(& - &), / .

, , , 50 C 70 C. 0,15 2 . (d < 0,15 ) (d > 2 ) H I .

, , :

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- (& - &) .

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. & 10921& B ; C - ; D - .

 

1.2.

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3.1. (fan inlet area)