Home
Up

 

 

Need Adobe Acrobat Reader? 

Click On
Link Below.

Get Adobe Reader

 

In-Joist

 

 

In-Joist Silencer Stops

NOISE To AND From

Teleconference, Multi-Media And Audio-Listening Rooms

 

 

Modular construction permits maximum performance match to full acoustical spectrum and aerodynamic requirements.

 

Multiple audio speakers are required to reproduce full spectrum acoustic response from low frequency special effects through high frequency sound.  The same basic laws of physics that limit dynamic range of sound reproduction apply equally to sound attenuation!  Aeroacoustic Engineering Consultants, LLC (AEC) has recognized these design limitations and developed a modular family of silencers to accomodate any aeroacoustic spectra requirement.  Sound attenuators range from the cost effective In-Joist silencer through high performance, high transmission loss (HTL) ALPHALOC sound attenuator systems.

 

 

Octave Bands  Hz 63 125 250 500 1000 2000 4000 8000
Model Length (L) dB Insertion Loss @ v=0
IN mm
IJR10-(L) 36 915 4 9 17 27 35 36 27 17
60 1525 7 14 27 41 50 50 40 26
84 2135 11 22 37 50 50 50 50 35
108 2745 13 26 48 50 50 50 50 45
IJR20-(L) 36 915 3 7 13 21 32 29 22 13
60 1525 6 12 22 33 50 48 39 17
84 2135 9 18 30 46 50 50 44 26
108 2745 11 22 34 50 50 50 46 40
IJR30-(L) 36 915 2 5 10 18 26 21 17 12
60 1525 5 10 17 28 42 38 27 16
84 2135 7 15 24 38 50 50 35 20
108 2745 9 18 30 48 50 50 37 36
IJR40-(L) 36 915 2 4 8 15 23 15 11 10
60 1525 3 7 13 24 33 29 18 12
84 2135 5 11 20 33 46 41 24 15
108 2745 7 14 26 40 50 50 33 26
IJR50-(L) 36 915 1 3 6 13 17 12 7 7
60 1525 2 5 11 19 27 20 13 8
84 2135 4 8 16 26 37 31 19 12
108 2745 5 11 23 32 42 39 25 18

 

 

Pressure Drop I.W.G 0.05 0.10 0.15 0.20 0.25 0.30 0.40 0.50
Pascals 12.5 25 37 50 62 75 100 125
Model IN mm Duct Approach Velocity - FPM
IJR10-(L) 36 915 435 600 740 850 950 1050 1200 1350
60 1525 320 460 560 650 720 790 910 1050
84 2135 ---- 380 460 550 610 660 780 860
108 2745 ---- 340 410 480 530 580 680 750
IJR20-(L) 36 915 620 880 1050 1250 1400 1500 1750 1950
60 1525 510 720 890 1050 1150 1250 1450 1650
84 2135 440 620 760 880 980 1050 1200 1350
108 2745 380 540 660 760 860 940 1100 1200
IJR30-(L) 36 915 810 1150 1450 1700 1900 2100 2400 2700
60 1525 680 960 1150 1350 1550 1650 1950 2200
84 2135 590 850 1050 1200 1300 1450 1700 1900
108 2745 530 760 920 1050 1200 1300 1550 1750
IJR40-(L) 36 915 1100 1500 1900 2200 2400 2700 ---- ----
60 1525 900 1300 1550 1800 2050 2250 2600 2900
84 2135 800 1150 1350 1600 1800 1950 2250 2500
108 2745 710 1050 1250 1450 1600 1750 2050 2250
IJR50-(L) 36 915 1350 1900 2300 2750 3000 ---- ---- ----
60 1525 1150 1600 2000 2300 2550 2800 ---- ----
84 2135 1050 1450 1750 2050 2250 2500 2950 ----
108 2745 900 1300 1600 1850 2050 2250 2600 2950

 

Download the PDF Datasheet Below by Clicking on Link
 

 

Copyright 2010 Aeroacoustic Engineering Consultants, LLC
Last modified: March 03, 2011