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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