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63 125 250 500 1000 2000 4000 8000
-1500 1.125 (281) 8 17 41 53 58 55 32 19-1000 0.5 (125) 7 16 41 53 58 55 32 20-750
0.281 (70)
7 16 41 53 58 55 32 20-500 0.13 (33) 7 15 41 53 58 55 32 21
LENGTH 96" 0 --- 7 15 40 52 59 55 34 24500 6 14 39 51 56 54 36 27750 6 14 40 51 55 54 36 27
1000 6 13 37 50 55 55 37 291500 6 13 37 50 55 55 37 30-1500 1.058 (265) 8 17 37 48 57 57 39 22-1000 0.47 (118) 7 16 37 48 57 56 39 23-750 0.264 (66) 7 15 36 48 56 56 40 23-500 0.118 (30) 7 15 35 47 56 55 40 24
LENGTH 84" 0 --- 7 14 35 47 55 55 42 27500 6 13 35 46 54 54 43 27750 6 13 34 46 54 54 43 27
1000 6 13 34 45 53 53 43 281500 6 12 33 45 53 53 43 29-1500 0.99 (248) 7 14 33 45 51 52 36 22-1000 0.44 (110) 6 14 33 45 51 52 36 22-750 0.248 (62) 6 13 32 43 50 52 37 22-500 0.11 (28) 6 13 33 43 50 51 37 23
LENGTH 72" 0 --- 6 13 32 42 50 51 38 24500 5 12 32 42 50 51 38 25750 5 12 32 42 49 51 38 25
1000 5 12 31 40 48 50 39 261500 4 11 31 40 46 50 38 27-1500 0.84 (210) 5 12 30 37 44 40 23 13-1000 0.38 (95) 5 11 29 36 44 40 23 13-750 0.21 (53) 5 11 28 36 44 40 23 14-500 0.1 (25) 4 11 28 36 44 40 24 14
LENGTH 60" 0 --- 4 11 28 36 43 41 25 17500 4 11 27 34 42 41 25 19750 4 11 26 34 41 41 26 19
1000 4 11 26 33 41 41 26 201500 3 10 25 31 41 41 27 21
SILENCER LENGTH
OCTAVE BEND CENTER FREQ (Hz.)
INSERTION LOSS (dB)
STATIC PRESSURE
DROP Inch.Wg (Pa)
FACE VELOCITY
Fpm
0.13 (33)
0.281 (70)
0.5 (125)1.125 (281)
0.118 (30)0.264 (66)0.47 (118)1.058 (265)
0.11 (28)0.248 (62)0.44 (110)0.99 (248)
0.1 (25)0.21 (53)0.38 (95)0.84 (210)
SOUND ATTENUATORSQUARE-RECTANGLE
CSA-M
www.kbeinternational.com
SAPREV:1.0 2017
Date:10/05/2017
Acoustic Performance-CSA-M-20-10-L
63 125 250 500 1000 2000 4000 8000SILENCER LENGTH
OCTAVE BEND CENTER FREQ (Hz.)
INSERTION LOSS (dB)
STATIC PRESSURE
DROP Inch.Wg (Pa)
FACE VELOCITY
Fpm
-1500 0.81 (203) 6 12 23 31 37 39 24 15-1000 0.36 (90) 6 12 23 31 37 39 25 16-750 0.203 (51) 5 11 22 30 37 39 25 16-500 0.09 (23) 5 10 22 30 37 39 20 17
LENGTH 48" 0 --- 5 9 22 29 36 39 22 17500 4 9 21 28 35 39 22 18750 4 8 21 28 34 39 22 18
1000 4 8 20 27 34 39 27 181500 3 7 20 27 34 39 28 19-1500 0.697 (174) 6 7 19 22 25 24 15 11-1000 0.31 (78) 5 7 18 22 25 23 15 10-750 0.174 (44) 5 7 17 22 25 23 14 10-500 0.077 (19) 4 6 16 21 25 23 14 10
LENGTH 36" 0 --- 4 6 17 21 25 23 15 11500 4 6 17 20 24 23 16 12750 4 6 16 20 23 23 16 13
1000 4 7 16 19 23 23 16 131500 3 6 15 19 22 23 17 13-1500 4 5 11 13 14 15 10 8-1000 0.24 (60) 4 5 11 13 14 14 10 8-750 0.135 (34) 3 4 11 13 14 14 10 7-500 0.06 (15) 3 4 11 13 14 14 10 7
LENGTH 24" 0 --- 2 4 10 13 14 14 11 9500 2 4 10 12 14 14 11 9750 2 4 10 12 13 14 11 91000 2 4 10 12 13 14 11 101500 1 4 9 12 13 14 11 10
0.09 (23)0.203 (51)0.36 (90)0.81 (203)
0.077 (19)0.174 (44)0.31 (78)0.697 (174)0.54 (135)
0.06 (15)0.135 (34)0.24 (60)0.54 (135)
FACE AREA(Ft²)
0.5
Adjustment Factor (dB)
-9 -6
Self generated power levels listed in the table require adjustment for silencer or silencer banks with face area other than 4 Ft². Add or subtract the following factors to all octave bands.
FACE ARAE ADJUSTMENT FACTORS
1 2
-3 0
4
3
8 16
6 9
321 2 3 4 5 6 7 863 125 250 500 1000 2000 4000 8000
-1500 70 60 58 58 59 60 58 51-1000 60 54 51 52 53 51 46 37-500 57 42 39 39 34 25 18 21500 57 43 38 38 34 25 19 211000 59 54 52 52 52 50 45 351500 70 63 59 59 59 58 57 51
AIRFLOW- GENERATED SOUND POWER LEVELS
FACE VELOCITY
OCTAVE BEND CENTER FREQ (Hz.)
SOUND ATTENUATORSQUARE-RECTANGLE
CSA-M
www.kbeinternational.com
SAPREV:1.0 2017
Date:10/05/2017
Acoustic Performance-CSA-M-20-10-L
63 125 250 500 1000 2000 4000 8000
-1500 0.54 (135) 5 19 37 48 56 52 28 16-1000 0.24 (60) 5 18 37 48 56 52 28 17-750 0.13 (33) 6 18 37 48 56 52 29 18-500 0.06 (15) 6 18 36 47 56 52 30 20
LENGTH 120" 0 --- 6 17 34 46 56 52 31 22500 0.06 (15) 5 16 34 45 56 52 32 22750 0.13 (33) 5 15 33 45 55 52 32 23
1000 0.24 (60) 5 15 33 45 53 53 33 241500 0.54 (135) 4 15 32 45 53 53 34 24-1500 0.46 (115) 8 14 33 41 54 46 22 13-1000 0.21 (53) 7 13 32 41 54 46 23 14-750 0.11 (28) 7 13 31 41 54 46 24 14-500 0.05 (13) 6 12 31 40 54 46 24 16
LENGTH 96" 0 --- 6 12 29 39 53 47 26 19500 0.05 (13) 5 11 28 38 53 47 28 19750 0.11 (28) 5 11 28 38 53 47 28 19
1000 0.21 (53) 5 11 28 37 53 47 29 201500 0.46 (115) 5 10 27 37 53 47 30 21-1500 0.4 (100) 6 11 26 33 45 37 19 12-1000 0.18 (45) 6 10 25 33 45 38 20 12-750 0.1 (25) 6 10 25 32 45 38 20 12-500 0.04 (10) 5 10 24 32 44 38 21 13
LENGTH 72" 0 --- 5 10 23 31 43 38 21 15500 0.04 (10) 4 10 23 30 42 39 23 15750 0.1 (25) 4 9 22 30 42 39 23 15
1000 0.18 (45) 4 9 22 29 42 39 24 161500 0.4 (100) 4 8 21 29 41 39 25 16-1500 0.34 (85) 5 10 23 29 40 33 17 11-1000 0.15 (38) 5 9 22 29 40 34 18 11-750 0.09 (23) 5 9 22 28 40 34 18 11-500 0.03 (8) 4 9 21 28 39 34 19 12
LENGTH 60" 0 --- 4 9 20 27 38 34 19 13500 0.03 (8) 4 9 20 26 37 35 20 13750 0.09 (23) 3 8 19 26 36 35 21 13
1000 0.15 (38) 3 8 19 25 36 35 21 141500 3 7 18 25 35 35 22 14
SILENCER LENGTH
FACE VELOCITY
(Fpm)
OCTAVE BEND CENTER FREQ (Hz.)
INSERTION LOSS (dB)
STATIC PRESSURE
DROP Inch.Wg (Pa)
SOUND ATTENUATORSQUARE-RECTANGLE
CSA-M
www.kbeinternational.com
SAPREV:1.0 2017
Date:10/05/2017
Acoustic Performance-CSA-M-20-15-L
63 125 250 500 1000 2000 4000 8000SILENCER LENGTH
FACE VELOCITY
(Fpm)
OCTAVE BEND CENTER FREQ (Hz.)
INSERTION LOSS (dB)
STATIC PRESSURE
DROP Inch.Wg (Pa)
-1500 0.31 (78) 5 8 20 24 31 26 14 9-1000 0.135 (34) 5 8 19 24 31 27 15 9-750 0.08 (20) 5 8 19 23 31 27 15 9-500 0.03 (8) 4 8 18 23 30 27 16 10
LENGTH 48" 0 --- 4 7 17 22 30 27 16 11500 0.03 (8) 4 7 17 22 29 28 17 11750 0.08 (20) 3 7 17 21 28 28 18 11
1000 0.135 (34) 3 7 17 21 28 28 18 121500 0.31 (78) 3 6 16 21 28 28 19 12-1500 0.27 (68) 5 6 16 18 21 19 11 6-1000 0.12 (30) 5 6 16 18 21 20 11 6-750 0.07 (18) 4 6 15 18 21 20 12 7-500 0.03 (8) 4 6 15 17 21 20 12 8
LENGTH 36" 0 --- 4 5 14 17 21 20 13 9500 0.03 (8) 3 5 14 17 21 20 14 9750 0.07 (18) 3 5 14 16 20 20 14 9
1000 0.12 (30) 3 4 14 16 20 20 14 91500 0.27 (68) 3 4 13 16 20 20 15 9-1500 0.2 (50) 4 4 8 10 13 12 8 6-1000 0.09 (23) 4 4 8 9 13 12 8 6-750 0.05 (13) 4 4 7 9 13 12 9 6-500 0.02 (5) 3 4 7 9 13 12 9 7
LENGTH 24" 0 --- 3 4 7 9 13 12 9 7500 0.02 (5) 3 3 7 9 12 12 9 7750 0.05 (13) 2 3 7 9 12 12 9 7
1000 0.09 (23) 2 3 7 9 12 12 9 71500 0.2 (50) 2 2 7 9 12 12 9 7
FACE AREA(Ft²)
0.5
Adjustment Factor (dB)
-9 -6
Self generated power levels listed in the table require adjustment for silencer or silencer banks with face area other than 4 Ft². Add or subtract the following factors to all octave bands.
FACE ARAE ADJUSTMENT FACTORS
1 2
-3 0
4
3
8 16
6 9
321 2 3 4 5 6 7 863 125 250 500 1000 2000 4000 8000
-1500 67 57 52 52 56 55 49 39-1000 58 49 47 48 48 43 34 23-500 55 41 31 26 21 16 18 22500 56 42 31 27 21 17 18 211000 57 50 47 47 46 42 34 231500 66 59 54 55 55 53 49 41
AIRFLOW- GENERATED SOUND POWER LEVELS
FACE VELOCITY
OCTAVE BEND CENTER FREQ (Hz.)
SOUND ATTENUATORSQUARE-RECTANGLE
CSA-M
www.kbeinternational.com
SAPREV:1.0 2017
Date:10/05/2017
Acoustic Performance-CSA-M-20-15-L