Noise Curtains

by dB Engineering

Acoustical Curtain Systems

Acoustical Curtain System

dB Engineering's Acoustical Curtain Systems offer an effective, economic method of noise reduction in a wide variety of industrial, architectural, community and OEM noise control applications.   Acoustical Curtain Systems can be configured to create total enclosures, partial enclosures, hoods or shrouds, barrier walls and divider partitions.

A wide variety of dB Engineering Acoustical Curtain Panels and curtain support framing options are available from United Process to meet any requirements.

Attack noise problems at their source. Surround the noise with a Noise Curtain System.

Problem: A small, high-speed, automatic stamping press, operated continuously through the day producing noise levels of 95 to 100 dBA in the surrounding area. The operator’s duties involved only loading the strip stock, changing dies, removing finished parts, and monitoring the operation visually.

Noise Curtain System blowupSolution: A flexible, composite "curtain" of BSC-25 was hung from a track around the entire press. A sliding panel of the same material with a transparent vinyl viewing window provided access to the inside enclosure. [Click for larger image.]

Results: The enclosure, with the door closed, provided 15 dBA noise reduction in the adjacent area, including the operator’s station.


Sound Absorption Data-Absorber Random Incident Sound Absorption
  Octave Band Center Frequencies (Hz)
125 250 500 1,000 2,000 4,000 NRC
BBC Products 1" th. .12 .47 .85 .84 .64 .62 .70
BBC Products 2" th. .07 .27 .96 1.13 1.08 .99 .85
BSC Products 2" th. .19 .99 .96 .80 .57 .33 .85

Per ASTM: C-423

 

Sound Transmission Loss (dB) Octave Band Center Frequencies (Hz)
Curtain
Product
Thickness
(in./Nom.)
Wt.
Lb./S.F.
125 250 500 1000 2000 4000 STC
BBC-13-2" 2 1.5 13 20 29 40 50 55 32
BBC-13 1 1.3 11 16 24 30 35 35 27
BBC-25-2B 2 2.5 19 22 28 40 56 61 33
BSC-25 2 1.5 12 16 27 40 44 43 29
BSC-31 2 1.5 12 16 23 33 38 39 27
BSC-25-RP 2.5 2.6 19 20 28 42 56 62 31

Per ASTM:E-90

 

Flammability Ratings
Product Description Flame Spread Smoke Density
BSC-25 Vinyl faced 1" quilted fiberglass on both sides of a 1 lb. PSF non-reinforced loaded vinyl noise barrier septum. 23 30
BSC-26 Silicone faced 1" quilted fiberglass on both sides of a 1 lb. PSF non-reinforced noise barrier septum. 4 19
BSC-24 Scrim faced 1" quilted fiberglass on both sides of a 1 lb. PSF non-reinforced noise barrier septum. 5 1
BBC-13-2" Vinyl faced 2" quilt on one side of a 1 lb. reinforced loaded vinyl noise barrier 23 12
BBC-13 Vinyl faced 1" quilt on one side of a 1 lb. reinforced loaded vinyl noise barrier 23 30
BBC-14 Silicone faced 1" quilt on one side of a 1 lb. reinforced loaded vinyl noise barrier 4 19
Above table shows flame spread and smoke density ratings per ASTM Designation E84; Surface Burning Characteristics of Building Materials.
Note: Class 1 (or A) rating applies to products with a flame spread of 25 or less.

Additional products tested to ASTM E 162 and ASTM E 662, available on request.

 

Acoustical Curtain System Acoustical Curtain System

Sample
BSC-25 Acoustical Panels used in a music rehearsal room.

Table showing how the human ear perceives noise reduction.

Decibel Reduction Reduction Experienced by Ear
2 15%
4 23%
6 38%
8 48%
10 56%
12 63%
14 68%
16 75%
18 77%
20 81%

Sound Seal EnclosurePoints To Remember


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