5α. Παρουσίαση (1) ΗΧΟΜΟΝΩΣΗΣ
Post on 12-Oct-2015
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DESCRIPTION
τερτTRANSCRIPT
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3 :
. duap LeMans -
...
-
:
( 12) &
: ( 12)
: ( ), , :- 35 dB() , ( ),- 45 - 50 dB() , ,- 65 dB(), , .
-
() ( 12)
DIN 4109
1180 / 81, 293/
45 / 3010 / 85, 593 /85 & 48 /86
868
VDI 2081 (2000)
-
/
:
-
12 ( 33 34 .. )
()
()
Rw / Ln
L / Lp
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L - L1 = D L = L1 + D
D = R`w ( L`n,w ) i
D (difference level) /
i
(, , , )
(decibel)
dB(A) dB.
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(1) ]
R`w = L - L1 + i
R`w = ( dB)
(L + k) - L1 + 10log(f) + 10log(TR) + 10log(S/V) + 10log(n) + 8
k
f [ f = 4 & f = 1 .]
TR (sec)
S (m2)
V (m3)
n .
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(2) 1] R`w = ( dB)(L + 3) - L1 + 10log (f) + 10log (TR) + 10log (S/V) + 10log (n) + 8
2] R`w = ( dB)(L + 0) - L1 + 10log (f) + 10log (TR) + 10log (S/V) + 10log (n) + 8
3] R`w = ( dB)(L - NR) - L1 + 10log (f) + 10log (TR) + 10log (S/V) +10log (n) + 8
NR = 10log ( / ) NR
Rw = R`w + d 34.
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(3) ]
L`n,w = L - L1 + i
L`n,w = L - L1 + 10log (TR / V) + 18 ( dB)
TR (sec)
V (m3)
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(1) () Lo (37.1 - 37.2)
(2) () L1 NC ( 35)
(2) () L1 ( 36)
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(1) ( ) :
) , .
( ) 10 20cm 2.000 3.000g/m3 ( )
) , , -
.
,
,
-
(2) : , ( 42 )
) , .
/
( 5 10dB min 13 dB ).
-
(1)Rw' < 40 dB() ,
2
Rw' < 44 dB()
,
4
Rw' < 48 dB() ,
2 ,
-
(2)Rw' < 52 dB()
,
Rw' < 56 dB()
,
3 ,
Rw' < 60 dB() ,
,
4 ,
-
(3)Rw' < 64 dB()
,
,
,
4+2 ,
Rw' > 64 dB()
,
,
2+4+2 .
-
(1) . (3) :
) , , / .
(4,2 6,5cm) (15 25g/m2), . . ( ) ( ) .
-
(2)) , .
- ( 3 )
- ( ),
- / ,
, , , >30dB.
) , -
, - (
)
-
(1)-Rw' < 20 dB() 4,2cm, 1 + 1,5cm
(15 20g/m2).
-Rw' < 25 dB() 5,5cm, 2 + 1,5cm
(20 25g/m2).
-Rw' < 30 dB() 4,2 5,5cm, 1 2 + 1,5cm
(25 30g/m2). 3 .
-Rw' < 35 dB() 6,5cm, 2 + 2,5cm
(30 35g/m2). 3 , ,
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(2)-Rw' < 40 dB() 4 5cm, 1 + 2mm
(30 35 g/m2). , 3 , .
-Rw' > 40 dB() 4 5cm, 1 + 2mm,
, (>45g/m2). , & , .
-
(1)-Rw' < 20dB() 5mm,
.
-Rw' < 25dB() ,
7mm, 6mm, .
-Rw' < 30dB() ,
5mm, 5cm, .
( ), 6 8 mm,
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(2)-Rw' < 35dB() 3mm,
, ,
8mm, 5mm ,
( ), 6 8 mm,
-Rw' < 40dB() 5mm,
, , 10
13mm, 5 8mm , ( ), 10
12 mm ,
-Rw' > 40dB() ( 10cm)
( ), ( 5
cm), &
-
( 42)
( 45)
( 44)
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(1) () () / (, , ).
,
,
cR`W
= 10 - R`w /10 R`W = 10log (1/ )
:
cR`W=10 log[(S1 + S2 + S3 +. . .) / (1S1 + 2S2 + 3S3 +. . .)]
-
(2),
, (
) ( )
.
, 41
( ) cR`W ( )
cRW ( ) 34