Acoustic Door & Frame Assemblies

Karpen Steel’s acoustic doors and frames combine outstanding sound transmission loss with the appearance of standard hollow metal products.

Typical Installations & Usage

  • Radio/Television Stations: Broadcast/recording areas
  • High schools/theaters: Music areas/auditoriums
  • Areas for private speech: Government secure areas
  • Office Buildings: Mechanical rooms
Sound Transmission Class (STC)
STC Value Rating Description
50-60 Excellent Loud sounds heard faintly or not at all
40-50 Very Good Loud speech heard faintly but not understood
35-40 Good Loud speech heard but hardly intelligible
30-35 Fair Loud speech understood fairly well
25-30 Poor Normal speech understood easily & distinctly
20-25 Very Poor Loud speech audible

STC Ratings

  • Operable door tests in accordance with ASTM E90. Copies of test results are available.
  • STC 47: Single: Flush
  • STC 47: Single: Flush
    • UL Label 1½ Hour
    • 3′-0″ x 7′-0″ Max Size
  • STC 41: Single: Vision Lite
    • 3″x 33″ exposed glass or
    • 10″ diameter round
  • STC 38: Pair: Flush
    • Provided with double astragals

Frame

  • 14-Gauge cased open

Door

  • 14-Gauge
  • Vertically steel stiffened, seamless edge

Sold as unit only

  • Price includes frame, door, crate and hardware
    Legacy sound seals and hinges are supplied
  • The distributor only needs to supply the lock and closure

Standard Hardware Finish

  • Clear Anodized Aluminum
  • All doors and frames are primer finished
  • All cam lift hinges are stainless steel

Maximum Sizes

  • Singles:
    • 4′-0″ x 7′-0″ or
    • 3′-6″ x 8′-0″
  • Pairs:
    • 8′-0″ x 7′-0″ or
    • 7′-2″ x 8′-0″
  • Weight:
    • 3′-0″ x 7′-0″ door weighs 380 lbs