2009

66

*1 *2 *3

*1

*2 (ASLI) *3

ASTM E477-99 AMCA 300-05 Insertion lossAir flow generated noisePressure dropSound power level

AMCA 1011-03( 1) ( AIR MOVEMENT AND CONTROL ASSOCIATION INC.) ASTM E-477-99 ( 2) ASTM ISO7235-2003( 3) CNS A3414( 4) ISO 7235-2003 GB/T 4760-1995( 5) :(/)(Insertion loss)() AMCA 300-05( 6)(TL)

1() 1()() 2 3a. 4.8m 1.0m(W)*0.6m(H) b.90

2009

67

6 7 8: 25000 CFM 9 10 2(AMCA300) 1 620m3 2 3 2.2m*2.2m 3 1:B&K 3560 B T23 PULSE Acoustics Analyzer 2:B&K 4943 MIC+B&K2639 Preamplifier 3B&K 3923 Rotating Boom 4B&K 4204 Reference Sound Source 5B&K 4296 Omni Power Source 6Loudspeaker JBL AM4315/95

40m 12m

~

2009

68

5F

6F

2009

69

1

AMCA ASTM E477-99 ISO7235-2003 98 CNS A3414 ISO7235-2003

2

5

25cm

ANSI S12.31

2009

70

5m/s

-20

0

20

40

60

63 125 250 500 1k 2k 4k 8k

1/1 Oct.

dB(li

n)

PCI5m/s

NC15

()

()

10m/s

-20

0

20

40

60

63 125 250 500 1k 2k 4k 8k

1/1 Oct.

dB(li

n)

PCI(10m/s)

NC20

()

()

10m/s

3

10m/s

5m/s

2009

71

2009

72

0

20

40

60

80

100

120

16 31.5 63 125 250 500 1000 2000 4000

1/3 Oct.B.W(Hz)

dB (r

ef 1

0-6 m

m/s

)

5F(TappingMachine 3m)

()

20~25dB

2009

73

4CFD CFD STAR-CD CFD

2009

74

6F 5F

6F 5F CFD

2009/11

2009

75

Mr. Jerry G. Lilly

1. AMCA PUBLICATION 1011-03, CERTIFIED RATINGS PROGRAM ACOUSTICAL DUCT SILENCERS. 2. ASTM E477-99 Standard Test Method for Measuring Acoustical and Airflow Performance of Duct Liner Materials and Prefabricated Silencers. 3. ISO7235-2003 Acoustic-Laboratory measurement procedures for ducted silencers and air-terminal unites-Insertion loss, flow noise and total pressure loss 4. CNS A3414 5. GB/T 4760-1995 6. AMCA Standard 300-05 Reverberant Room Method for Sound Testing of Fans