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ΜΕΤΡΗΣΗ ΚΙ ΑΝΑΛΥΣΗ ΤΟΥ ΗΧΟΥ
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1
..4
1
1......5
2. ....6
2.1 ( ) .6
2.2 ( ) .7
3. o .11
4. .14
4.1 pi, pi pi, .14
5.- .16
5.1 pi .. .17
5.2 .18
5.3 . .19
5.4 .21
5.5 -...24
5.6 Leq. .25
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2
2 -
1....26
2. .26
3. ..27
4. .....30
5. .31
3
1.. .33
2.. .33
3............ .35
4. ....36
5...40
5.1 pi ...41
5.2 pi ..41
5.3 .42
5.4 pi pi .43
5.5 .44
5.6 ..45
6..46
6.1 pi...46
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3
6.2 pi ..47
6.3 pi ...48
7. .49 8. pi ...50
9. (calibration)..51
4 1...53 2....53 3....54 4....56
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4
pi pi pi pi . , pi . , pi pi pi pi pi .
pi . pi pi 10-20 pipi pi ' pi pi. pipi pi, pi pi pi , pipi pi pi pi , pi.. , pi pi pi pi pi pipi.
pi pi pi pi .
pi pi , pi pi pi pi. pi pi , pi pi . pipi . pi pi pi pi pi pi pi . pi pi pi pi, pi . pi pi, pi pi.
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5
1 -
1.
"" ' pi . pi pi ( ) pi pi . (. 1). "" pi pi pi pi pi 16z 20z, pi pi pi pi .
1.
pi , (), pi pi pi , . pi , . 2.
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6
2.1 ( )
pi pi pi pi pi pi pi pi , . pi . pi ( ' ) pi (. 2).
2. .
pipi pi (), pi . pi pipi pi (pi ) pi pi pi pi (. 3).
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7
3. pi pi pi. pi pi pipi f pi pi pi ( pi pipi pi) sec. pi cycles/s . Hertz(Hz) pi pi pi (. 3). , pi pi. pi . pi
C=r
rg
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pi 0 pi, pi ( ) , pi 1.4. (20C, 1 atm), pipi 344m/s. f, c pi pi c = *f. 2.2 ( ) pi pi pi , . pi "" pi , pi ' pi ' pipi .
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8
pi , pi, , pi pi' . pipi pi pi , pi pi pi pi pi . pi , , pipi pi pi . . pi . pipi pipi . pi . 4 pipi .
pi cL=r
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pi pi . cL 1.
4. . . pi pi pi pi . ' pi pi (. 5). . c pi ( pi)
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9
1. .
(GR/CM^3) (dyn/cm2)
cL_(cm/sec)
2,7 72.1010 5,2 . 105
11 ,3 17.1010 1,25. 105 7,8 200.1010 5,05. 105 7,8 210.1010 5,1 . 105 19,3 80.1010 2,0 . 105 8,9 125.1010 3,7 . 105 pi 8,5 95.1010 3,2 . 105 7,13 13.1010 1,35. 105 ' 2,0 28.1010 3,7 . 105 1 ,8-2,3 7,7.1010 1,9 . 105 0,7-1,0 2-10.1010 1 ,5-3,5 . 105 0,4-0,7 1-5 .1010 2,5 . 105 0,12-0,25 0,03.1010 0,43. 105 1,2 7.1010 2,4 . 105 2,5 60.1010 4,9 . 5 Novopan 0,6-0,7 4.6,1010 2,7 . 105 1,7 4.4.1010 1,6 . 105 pi 2,3 26.1010 3,4 . 5 1,5 0,03.1010 0.1-0,17. 105 Plexiglas 1,15 5,6.1010 2,2 . 105 1,9-2,2 16.1010 2,5-3 . 105 pi 0,6 5,4.10 3 .105
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10
5. . CB = 4 ''
2
mBw
pi =12
2Eh pi, =2pif ,m
pi h pi pi.
pi LC = rE
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BC = fhCL ***8.1
pi pi pipi pi pi m. pi , Bl pi pi pi pi (. 6), pi pi pi pi .
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11
6. pi .
3.
pi pi pipi pi (pi pi.. ) .
7. pi .
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12
pi pi pi , pi . pi pi pi pipipi pi ' (pi ) pi ' (pi ) (. 7). pi (pi.. pi) pi , pi 0 pi pi pi . : ) 0 pi .
8. pi pi .
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13
=0 pi pi gf pi . pi
=2pi 42 ''mB
w 0=
wpC2 =0 pipi
gf = B
mC ''2
2
p
pi C . pi pi , pi . pi pipi pi pipi . pi h pi pi
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Lg =
9 pi .
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14
9 pi pi pi pi pi . pi pipi pi pi pi 100-3200Hz pi .
4. pi pi pi pipi pi. pipi pipi pi pipi , pi . "" pi pi pi pi . pi pi pi pi pi . pi pi . 4.1 pi, pi pi, , pi pi pi pi pipipi ' . pi pi pi ( ), pi pipipi pi. pi pi pi , pi pi pi pi pi pipipi. pi pi pi . 1 ( pipi pi) 0 ( pipi ).
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15
10. pi pi. pi a pi pipi . pi a 125, 250, 500, 1000, 2000 4000Hz pi pipi . pi pi sabins. sabin pipi pi m2 pi a=1. pi pi pi pi (, pi pi) pi pi pi pi ' (pi.. , pipi, pi pi). pi pi pi pi pi
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= asA * opi 5 pi a pi. pi pi pi pi
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16
. sec pi pi pi L pi pi pi 60d pi . pi V (m3) pi pi (m2) :
( sec) = ( )( )23
163.0mAmV
Sabine, pi . pi pi pi pi .
11. . 5. - pi pi' pi pi . pi Desibel(d) pi g m, sec pi. pi pi pi pi pi. pi pi pi. , pi.. pi pi , pi, pi 20 10.000.000 a. pi pi pi .
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17
5.1 pi pi pi (t), pi . pi pipi pi 0 pi pi pi pi (. 12)
12. pi . pi , pi pi pi . pi
~p pi pi
( )dttpT
pT
=0
2~ 1
pi . pi pi 2.
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18
2. pi ' pi
~p {/ 2m )
pi L (d)
2.10-4 20
2.10-3 40
.pi 2.10-2 60
(pi.1m) 2.1-1 80
pi (pi.10m) 2 100
pi pi pi pi L pi
2
0
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log*10ppLp = ( d)
pi 2 pi 0 pi ( , . pi pi ) pi 25 /10*2 mN- 5.2 - - pi pi pi pi pi . , pi pi pi pi pi ( Watt/m2). pi pi pi pi pi S =
S
IdSP
pi pi pi pi pi pi , pi L ( pi) pi
0
log*10PPLp = ( dB)
pi pi pi 0 Watts1210- .pipi L
pi 3.
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19
3. pi
(Watt) Lp(dB)
10-6.....10-5 60.70
-3.....10-2 90....100
101......102 130...140
( 1-100 w) 10-2.....10 100...120
(800 w) 10-1 110
(600 s) 102 140
103......104 150...160
103......105 150...170
104......108 160...200
5.3 pi pi pi, pipi pi pi , pi pi . pi pi. 2 pi L1 L2 .
2
01
21
log*10ppL =
2
02
221
log*10ppL =
pi pi, pipi:
10101
20
21 L
pp
= 10102
20
221 L
pp
=
pi
+=
+=
+= 10101010log*10log*10log*10
2120
22
20
21
20
22
21 LL
pp
pp
ppp
Lol
pi L1, L2, ... , L
=
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1010log*10ol ( d).
pipi pi pipi:
2log*10log*102
log*10log*10 20
21
20
21
20
22
21 +
=
=
+=
pp
pp
ppp
Lol
31 += LLol dB
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20
pi, pi pi 3d. pipi pi 13. pi , pi pipi pi pi . L1=80d L2=85d. pi, L = L2- L1=85-80=5d. pipi pi 1.2d. pi pipi pi pi = L2+12=85+12=86.2 d .
13. .
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21
5.4 pi L pi . , . . pi . pi pi "" pi pi , pi pi pi, pi . , pi pi.. pi, pi (. 14). pi pi pi pi ( pipi pi pi ) pi (. 14) . , pi (. 14) pi .
14. . . 15 pi pipi pi 11 W.
15. .
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22
4. .
11 16 22 14.1 16 17.8 17.8 20 22.4
22.4 25 28.2
22 31.5 44 28.2 31.5 35.5 35.5 40 44.7
44.7 50 56.2
44 63 88 56.2 63 70.8 70.8 80 89.1
89.1 100 112
88 125 177 112 125 141 141 160 173
178 200 224
177 250 355 224 250 282 232 315 355
355 400 447
355 500 710 447 500 562 562 630 708
708 800 891
710 1000 1420 891 1000 1122 1122 1250 1413
1413 1600 1778
1420 2000 2840 1778 2000 2239 2239 2500 2818
2818 3150 3548
2840 4000 5680 3548 4000 4467 4467 5000 5623
5623 6300 7079
3680 8000 11360 7079 8000 8913 3913 10000 11220
11220 12500 14130
11360 16000 22720 14130 16000 17780
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23
pi pi pipi pi pi pi () pi pi pi . pi pi pi . pi : f =2 fk : f = 3 2 kf pi f fk pi pi . pi , pi pi pi . 4 . pi pi pi . pi , , pipi pi. . 16 1/3 . pi pi "" . 1/3 pi.. 100 150z . pi pi pi pi pi . pi 1/3 .
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24
16. 1/3 . 5.5 - pi pi pi pi pi 16z 20z. ' . , pi 1000z. pi pi pi pi . pi pi pi . pi pi pipi pi - L d (). pi d().
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25
5.6 Leq (quivalent Continuous Sound Level) pi (pi.. ) pi pi (. 17). pi pi pi pi L. pi pi Leq (quivalent Continuous Sound Level) pi ' pi ' pi . pi Leq pipi pi pi .
17. pi. Leq pi
=
TL
eq dtTL tA )(1.0101log*10 d()
pi L(t) -. Leq pipi pi pi (pi.. pi ) pi pi . , pi.. 10% 80d 90% 30d pipi 35d Leq 70d!
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26
2
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O pi pi pi pi pi pi pi . pipi pi pi pi . pi pipi pi . , O (W.H.O.), "" pi .
pipi pi pi :
pi pi. pi pi pi pi pipi pi pi.
pi , (stress).
pipi pi pi pi pi pi .
pi pi pi , pi pi pi pi pi pi pi pi. , pipi pipi pi , pi pipi pi ' pi .
pi pi , pi pi pi, :
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27
pi pi pi pi, pi pipi pi pi , pi . pi pi , (pi 40% pi, 50% , 55 % 70 % pi), pi.
pi pi, pi pi pi . pi pi pi pi pi, pi , pi pi. pi , ' , pi pi, pi.
pi
pi dB
pi pi pi pi pi pi pi 0 dB ( pi ) 130 dB ( pi pi ). pi pi pi pi pi. pi 20 pi 100 .
pi pi pi 0 1
20 100
pi 40 10 000
60 1 000 000
80 100 000 000
100 10 000 000 000
pi 120 1 000 000 000 000
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28
pipi pi . pi 0 pi 120 pi.
ertz Hz
pi . pi 20 20000 Hertz . pi . pi 1000 Hz - 5000 Hz. pi pi pi pi .
.
(dB)
- dB
55 16 -
50 16 -
,
35 16 45
pi pi
45 8 60
35
pi pi
pi 30 pi
45
55 . -
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29
pi 30 8 40
30 16
,pi pi , ,
pi
70 24 110
, , pi.
100 4 110
85 1 110
pi
85 1 110
pi pi , pi pi
140
( : )
( dB)
> 81
81
80
79
78
77
76
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30
75
74
73
72
71
70
69
68
< 68
pi pi pi pipi pipi pipi :
pi
pi .
pipi pipi pi .
pi :
pipi pi .
pipi (pi.. ).
pi , pi pi.
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31
pi - - , pi .
pi - pi - pi pi .
pi pi pi .
pi , pi , .
.
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pi pi pipi ( ).
pi pi pi pi .
pi pi - pi - .
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pipi pi pi , pi pi, , pi pi pi pi . pi: - pi , .
pi pi
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pi pi , pi .
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32
pi 12 5 pi 90 dB(A).
pi pi.
pi pi pi pi pi pi .
o 0 pi 20 dB. o 1 pi pi 20 - 40 dB. o 2 pi pi 40 - 60 dB. o 3 pi pi 60dB .
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33
3 1. pi pi pi pi . , pi . , pi pi pi pi pi . 2. pi pi. pi . 1.
1. pi (SPL) . pi SPL pi pi pi pi . pi pi Leq (Equivalent Continuous Sound Level) pi pi pi . pi _ pipi pi pi . Leq pi
=
TL
eq dtTL tA )(1.0101log*10 dB(A)
pi LA(t) -. pi pi pi L (L1, L10, L50, L90,..pi.) pi pipi pi . Ln pi pi n%
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34
. , pi L10 pi 10% . pi L1 pipi , L50 L90 L95 (. 2).
2. 28 . pi pi pi pi pi pi : TNI(Traffic Noise Index)= L90 +4(L10 L90 )-30 dB LNP (Noise Pollution Level)= Leq+ 1.1(L1- L50 ) . 3 pi pi . pi 24-. pi pi.. L95 ( ) (pi pipi ) .
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35
3. .
3.
pi pi pi , (pi. pi. 17252, 395//19-6-92) pi : ) Leq pi Leq(8.00 20.00 ), Leq pi pi 8.00 20.00 . ) L10 (18 ) pi 18 L10 (pi 06.00 24.00). pipi - pi Desibel d(). pipi pipi , : ) Leq (08.00 20.00) 67d() ) L10 (18) 70d(). pipi pi 2m pi pi pi pi pi . pipi pi , pi.. , , pipi pipi 5-10d().
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36
4.
pi pi pi.
50% (pi pi 330 . ) pi pi pi
15% (pi pi 100 .) pi pi pi . 25% 2000.
pi pi pi ( - , M 1994),
20-25% pipi pi pi pi pi ,
19% pi pi .
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pi 60 % pi , pi .
pi: 90 - 100 dB(A), , pi.
(pi - ).
pi
pi , pi, 478.000 pi 1.303.000 pi
pi pi, , 195.000 430.000
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37
pi pi pi, , pipi 550.000 1.400.000 .
pi pipi 40.000 70.000 pi.
pi , pi pi pi , pipi 5% 20-25% , pi , pi pi 5000 pi, pipi pi .
, 1994, pipi 3.717 pi 810 pi pipi 22%. pi pi pi ' 1995 2.211 . pi pi pi .
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pi pi pi :
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pi - pi pi / DG XI pi - 20-25% pipi pi pi . pi, 19% pi pi (pipi 67 .) pi . pi pi pi pi pi.
pi pi pi pi pi pi pi pipi 40% pi, 35% 70% pi .
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38
, pi pipi 23% pi , pi . [ Leq > 72 dB(A)]. [Lmax dB(A)] pi 90 - 100 dB(A), , pi. . pi pi , pi, 1.303.000 478.000 pi.
pi pi pi, pi pipi , 430.000 195.000 .
, pi pi, , , pipi 1.400.000 , pipi 550.000 . pi pipi 40.000 70.000 pi.
pi pi , pipi 5% 25% , pi , pi pi 5000 pi, pipi pi pipi. pi , , , , pi pi, pi pi 80% pi pi pi . , pi pi 1996, pi / . pi ..., pi "pi " pi pipi ( pi' . 28340/2440/92 - 532//18-8-92), pi pi pi 1997 pi pi 23.000 pi.
pi pi, pi pipi . pi , pi pi pi - pi - , , pi pi. pi pipi pi pi pi pi pi . pipi pi pi pi pi pi .
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39
. .
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pi pi pipi , pi pi () pi pi pi .
pipi pi pi . pipi pi pi pi pipi . pipi pi Leq, L10, Lmax Lmin a (L1, L50, L90). pipi pi , pi Leq (08.00-20.00) L10(18). pi pi pipi, pi pi pi :
+=
rqt 1204000el pi pi,
pi pi. pi pi.. , pipi pi q=3000 (/) r=50 (/pi). pi pipi pi t =4 pi. , 15 pi.
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40
pi Leq Leq (08.00-20.00) pi Leq(08.00-20.00) = Leq, 0 +10logNt/No pi Leq,o pi t (/) 08.00 20.00 0 (/) L10(18) pipi 18 pi ' 18
L10(18) = =
23
61018
1t
L ()
pi pipi pipi pipi 3- L10 L10 (18) L10(18) = L10(3)-1 d(). pipi pi pi pipi . , pipi L10 Leq Leq=Leq+3 d().
5.
pi pi pi pi: ) (/) ii) iii) (pi % - pi) iv) v) pi pi, pipi , pi pi L10 Leq. pi pi.. L10(18 ) pi pi pi pi .
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41
5.1 pi L10(18 ) pi 06.00 24.00, pi 10m pi V =75 m/h , . pi L10 (18 ) =29.1+10*logQ d() pi Q 18 (. 18). 200 /. pi pi 4. pipi pi.. 5000 18, L10(18) =66d(). L10 (18) Q (V=75km/h), =0, G=0
4. pi . 5.2 pi , pi pi pi pi pi pi % . pi
)(8.6851log*1050040log*33 AdBVp
VV -
++
++
pi V km/h pi % . pi 5. pipi pi.. 100 km/h pi 10% pipi +4 d ().
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42
5. pi . 5.3 pi = 0.3*G d(), pi G %. 6.
6. G.
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43
5.4 pi pi
7. pi - pi. pi pi pi . pi . 7 pi pi pi ". pi pi pi =-10*log(d/13.5) () pi pi . pi pi pi d pi h pi pi d pi
( )[ ]2122 5.3' ++= dhd , pi pi pi pi 8 . pi.. pi 100m pi 10m pi pipi -9dB().
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44
8. pi. 5.5 pi pipi , pi . pi pi pi pi pi . pi pi 9.
9.
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45
pi pi pi pi pi. pipi pi pi pipi pi "pi" . , pi , pi pi pi pi pi . pi 10. =33 pi 2 pi pipi -12d().
10. . 5.6 pi pi pi pipi pi pi pi pi pi, . . pi pi : pi (, pi, pi pi). pi pi 10pi pi ( pi ) pi pi , . pi pi pi. pi pi pi , pi pi pi pi .
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46
pi pi . pi pi pi 11.
6.
pi pi pi pi pi (pi) . pi pi pi . pipi pi (pi.. 10g/m2 ) pi pi . pi pi pi pi.. , plexiglas, , pi , pi. 6.1 pi pi , pi pi. pipi pi 12.
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47
12. pi. pi pi . pipi pipi pi pi pi pi =+-. 6.2 pi pi L pi pi 13 pi . pi pi pi. pi.. pi 13d pipi pi =0.5m. pi
deedgba --+++=-+= 2222 ss hhZ
pipi hs = mZ 3.211
=+
ed
pi pi mh 8.43.2
4514*)16(1 =+-+=
13. L pi .
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48
6.3 pi pipi L=13d pi pi . pi pipi "pi" pi . 14 pipi pi . pi pi pipi 1 2, pi pi L=13d.
14. . pi 1, 2 pi 15. pi pipi , L=13d, pi 1 pipi 80. pi pi -pi s 45m 100m, pipi pi 45*80+100=355m
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49
15. 2 pipi pi pipi .
7.
pi pipi . . . . pipi pi pi 160 . . pipi pi pi pi, 1,2 m ( ) pi . IV. pipi pi pi pi pi ( ) pi 2m pi pi . pipi pi . V. pipi pi . VI. pi pipi pi (calibration). VII. pipi .pi , pi , . pi , pi Leq, L10, Lmax, Lmin L1, L10, L90.
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50
8. pi pi pi rms pi pi pi , , pi pi .
pi pi , pi . , pi pi 30dB 120dB pipi . ,pi pi, 10dB pi . pi pi pi pi pi pi pi . pi pipi . pi pi pi , pi pi pi pi ,pi pi . pi 30Hz pi 70dB, 70-40=30dB() 70-17=53dB() 70-3=67dB(C). pi C pi , pi pi 200 1250 Hz. pi pi pi pi pi 70dB. pi pi pi 40dB.
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51
pi pi pi pi pi , dB(A), . pi D pi pi , pi 40noy . pi 40noy pi pipi pi . pi, pi pi pipi pi pi pipi pi pi pi .
19.
9. (calibration) pi , pi pi pi. pi pi , pi pi pi pi 20. pi pi pi 250 Hz 124dB. pi pipi pi pi pi pipi .
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52
20.
This watermark does not appear in the registered version - http://www.clicktoconvert.com
53
4 pi pi . pi , pi pipi 1.000.000 , pi . . pi : ) pipi pi pipi Leq (08:00-22:00). ) pipi . ) pipi pi 8:00pi.. 22:00.. pi pipi . pi . pi pi pi pi pi . 4 pi pi . pi 8 pi.. 22.. . pipi pi 1 pi pi pi , pi pi pi . pi pi pi pi 10m/s , pi pi pi pi 2 pi pi , pipi pi pipi 400 . pi pi . Leq pi pi pi pi pipi , . pi pipi Leq,h pi pi pipi . Leq pi pi
+=
mAeqAeq N
NLL log10metrhmenodiorqwmeno
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54
pi pi pi m . pipi pipi Leq pi pipi Leq,h pi pipi pi pi . pipi pi pipi pi pi pi 8:00pi.. 22:00.. Leq,h. pipi pipi pi. pi Leq,h, pi pipi pi Leq,h pipi pi : ( )NtNLL hAeqhAeq log10,, += metrhmenodiorqwmeno pi pi 8:00pi.. 20:00.. pi t . pi 1
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55
2
3
This watermark does not appear in the registered version - http://www.clicktoconvert.com
56
4
pi pi . Leq,h (pi ). Leq,h (8:00-22:00) Leq,h (8:00-22:00) dB(A) 1 74.8 dB(A) 2 74.2 dB(A) 3 74.9 dB(A) 4 74.2 dB(A) Leq,h () Leq,h (8:00-22:00) Leq,h (8:00-22:00) dB(A) 1 74.0 dB(A) 2 72.7 dB(A) 3 72.1 dB(A) 4 72.5 dB(A)
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L10,h (pi ). L10,h (8:00-22:00) L10,h (8:00-22:00) dB(A) 1 76.8 dB(A) 2 76.5 dB(A) 3 77.5 dB(A) 4 76.4 dB(A) L10,h () L10,h (8:00-22:00) L10,h (8:00-22:00) dB(A) 1 75.7 dB(A) 2 75.7 dB(A) 3 75.1 dB(A) 4 75.9 dB(A) pi pi pipi Leq,h (8:00-22:00) pi pi pi . pipi pi pi 1 2 dB(A). 4. pi pi Leq, L10 Leq, L10 pi 8:00-22:00. pi pi pipi pi pi pi pi pi . pi L-1,L-2,L-3,L-4,L-5,L-6,L-7,L-8. L-1, L-2, L-3, L-4 pi L-5,L-6,L-7,L-8 . Leq Leq pi 8:00-22:00 . pi pi pi ) Leq 08:00 22:00 ) Leq 08:00 22:00. pi pi Leq . pi pi pi ) Leq(08:00-22:00) ) Leq (08:00-22:00) . pi pi pi pipi Leq . pi pi pi pi pi pi pipi 3 dB(A). pi pi pi pi . pi pi pi pipi. L10 pi 2 3 dB(A) . pi pipi. pipi ,pi
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Leq L10 2 dB(A) pipi. pi , pi pi . pi pi pi pi pi 4 pipi pi pi pi pi 67dB(A). pi pi 8 dB(A) Leq(08:00-22:00) pi pipi pi pi .
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