Sonex Curtains – Barrier Septum


SONEX Curtains BS combine sound absorption and noise barrier properties into one product. An effective “sandwich” of layers, SONEX Curtain BS consists of quilted vinyl-faced layers of willtec® foam bonded on both sides of noise barrier material producing a curtain that both contains and absorbs noise. They are ideal for areas where noise sources are on both sides of the curtain.

SONEX Curtains BS are designed for use as noise barrier walls. They can be custom manufactured to integrate as a complete acoustical enclosure system giving access to machines or work cells. They are available in 25′ rolls with finished or unfinished edges. Flexible barrier septum, high Sound Transmission Coefficients (STC), impressive Noise Reduction Coefficients (NRC) and tough, durable, washable facings make SONEX Curtain BS an excellent choice for effective noise control on any size project.
SONEX Curtains BS are easy to install. Curtain hardware, hanging mechanisms and configuration options include clear vinyl windows, grommets, hook and loop fasteners, doors and sliding tracks. The standard facing material is a vinyl-coated fabric in grey, white, tan or black.

  • Absorptive layer on both sides
  • Prevents sound transmission
  • Rugged and durable
  • Customizable


  • Use as acoustical divider between two noise sources or separate noisy areas from quieter spaces
  • Keep noise out of offices adjoined to manufacturing areas
  • Separate machine or work stations where both sides need sound absorption and noise containment
  • Isolate and absorb noise around compressors, punch presses, vibratory bowls, granulators, turning machines or other noisy equipment
  • Use as walls of acoustical enclosures or partitions in manufacturing areas
  • Install as a liner for the interiors of pre-existing enclosures to further reduce noise levels
  • Suitable for some outdoor applications

SONEX Curtain BS Product Specifications

Construction One layer quilted willtec acoustical foam bonded to 1 lb,/sq.ft. loaded vinyl barrier bonded to one quilted layer of willtec
Facing Material Standard: vinyl-coated fabric (grey , white,tan,black)

Optional: Hi-Temp silicone-coated fabric, decorative cloth fabric or non-woven porous scrim fabric

Surface pattern Diamond- quilted pattern or straight- stitch pattern
Density Willtec foam: 0.7 lb./cubic ft. Barrier:1lb./sq.ft
Flammability Class 1 per ASTM E84
Flame Spread 21
Smoke Density 171

Sound Absorption Coefficients

Type G Mounting ASTM C423-90
  125Hz 250Hz 500Hz 1kHz 2 kHz 4kHz NRC.
BS-1 0.21 0.51 0.74 1.19 0.61 0.31 0.75

Sound Absorption Data

ASTM E90-75 ASTM E413-73
  125Hz 250Hz 500Hz 1kHz 2 kHz 4kHz STC.
BS-1 15 19 21 24 42 48 25

This product is manufactured by pinta acoustic, inc. and marketed by Memtech Acoustical, LLC