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Treatment Strategy

  • PathDirect
  • Receiver

Application Use

  • Industrial In-plant
  • Industrial New Con.
  • Architectural Walls/Ceilings
  • OEM
  • Environmental
  • HVAC


Acoustical Doors

Wood and Metal Acoustical Doors To Meet Any Architectural Or Industrial Noise Control Requirement

Outline drawing (above left) of STC-52 double doors.  Above right shows plenum style acoustical door.   Jet engine test cell STC-56 rated acoustical door with dual compression perimeter seals and drop threshold.


  • Acoustical ratings for standard products from STC-42 to 63
  • Complete assemblies including doors, frame, threshold, seals, hinges, closures and a wide variety of harware options
  • Custom designs are also available
  • Can combine fire and blast requirements
  • Durable rugged construction available in a variety of architectural finishes
  • Booth wooden and metal door construction available
  • Doors and frames can be shipped knocked down or completely assembled and pre-hung for ease of installation
  • Single, double, sliding, hinged, bi-folding and pneumatically controlled designs are available


  • Engine test cells
  • Broadcast/recording studios
  • Auditoriums and convention centers
  • Industrial and manufacturing plants
  • Federal and military applications
  • Concert halls
  • Conference rooms and offices
  • Arenas and sports complexes
  • Radio stations
  • Utilities and power plants
  • Movie theaters
  • Environmental facilities
  • Sliding and retractable area dividers
  • Performing arts centers
  • Shop offices
  • Aircraft/aerospace




  • Hollow metal door frame
  • Minimal seal kits
  • Butt hinges
  • Basic astragals
  • 1 3/4" thick door leaf
  • STC-35 to 40

Level 200 Design

  • Wrap frames (shown)
  • Structure tube steel frames
  • Dual compression/magnetic seals
  • Cam-lift hinges
  • Built-in sealing astragals
  • 2 1/2" thick door leaf
  • STC-48 to 52
Level 400 Design  

What is an STC Rating?

The Sound Transmission Class (STC) rating of a door quantifies the relative sound insulating performance of the door/frame asembly.  It is derived in accordance with ASTM test standard E90-75 as a result of a 2 room test where the only significant sound transmission between the rooms is through the test specimen.  This standardized lab test allows for performance comparisons of competing products.  It is important not to compare or confuse STC ratings for a door leaf vs. a complete door assembly with all of its seals.  Door leaf STC ratings may overstate acoustic performance by as much as 10 to 15 STC points when compared to testing the complete assembly.  Door STC ratings must be comparable to the wall, floor and ceiling STC values to maintain consistent performance.

Sound Transmission Loss, dB

  1/3 Octave Band Center Frequency, Hz
  125 250 500 1K 2K 4K STC
HS-400-48 36 41 45 51 50 52 48
HS-400-45 29 33 41 48 48 50 45
HS-400-51 34 44 47 53 52 60 51

Design Details For HUSH SWING™ HS-400-48 Doors

HUSH SWING™ Head Detail   HUSH SWING™ Stud Wall Jamb Detail
HUSH SWING™ Astragal Detail   HUSH SWING™ Sill Detail