Acoustic door & frame assemblies limit the amount of noise that travels from one side of the assembly to the other. The frame, door, seals, and threshold are all integral parts that work together to achieve an STC rating in a laboratory test. In a laboratory test, noise is generated on one side of the door & frame assembly and it is measured on the other. The difference in readings is called the transmission loss and is calculated following the ASTM E-90 standard. In accordance with ASTM E-413, the transmission loss at 16 frequencies is compared to the standard STC curve to determine the STC (sound transmission class) rating. An STC rating is tuned to the frequencies that the human ear hears.

SCIF (sensitive compartmented information facility) rooms often have acoustic security requirements – denying aural access to classified information.

AMBICO’s STC55 singles and pairs offer the following advantages:

  • At 2-3/4” thick they often accommodate latching hardware without the need to special order for thick doors.
  • The low-profile perimeter seal system works with mortised latching hardware’s standard 2-3/4” backset and allows for the use of most standard builders’ hardware. They can readily be configured to accept high-security hardware used on Secure Compartmented Information Facilities (SCIF) in accordance with DCID 6/9.
  • They can be fire rated as singles or pairs up to 180 minutes.

AMBICO continues to develop our acoustic door & frame assembly product line with an attention to detail that benefits our customers and end users.

Tim Berry, P.Eng.
Chief Operating Officer


1120 Cummings Avenue,
Ottawa ON
K1J 7R8Contact Info

Tel: 613 746 4663
Fax: 613-746-4721
E-mail: [email protected]

Hours of Operation
Monday – Friday
7:30am – 4:00pm