STATIC PRESSURE DROUP IN INCHES OF WATER

방음루버  MODEL
(Noishield Louvers)

.05

.10

.15

.20

.25

.30

.40

.50

.60

.75

1.0

1.25

FACE VELOCITY IN FPM

Model R
Model LP

215
270

305
380

375
465

430
540

480
600

525
660

610
760

675
850

745
925

830
1040

960
120

1070
1340

OCTAVE BANDS(Hz)

Octave Band Number
Center Frequency

1
63

2
125

3
250

4
500

5
1000

6
2000

7
4000

8
8000

TRANSMISSON LOSS IN DECIBELS(dB)

Model R
Model LP

5
4

7
5

11
8

12
9

12
12

14
9

12
7

9
6

FREE FIELD NOISE REDUCTION IN DECIBELS(dB)

Model R
Model LP

11
10

13
11

17
14

18
15

19
18

20
15

18
13

15
12