Hush Houses


Vital Link has been a major supplier in the aircraft Hush House market since 1990. Our scope of supply includes both standard USAF A/F37T-10/T-11 type facilities for the U.S. and foreign military services, and VLI advanced custom designed Hush Houses for the overseas market.

Hush House - Inside

A/F37 T-10 with aircraft in position

Hush House - Inside

US Navy T-10 Aircraft Acoustical Enclosure

Primarily designed for military fighter aircraft use, a Hush House is a facility that provides an enclosed, acoustically treated environment to run various aircraft types with the engines installed or to test un-installed engines. The Test Bay is sized to allow the users aircraft to be safely installed and restrained while running the engine(s) through their full performance tests as determined by the aircraft/engine OEM to enable performance issues to be identified and corrected. Various aircraft systems can also be checked while the aircraft engine(s) are running as per the Aircraft OEM requirements.


The Hush House provides an enclosed work area for preparing the aircraft or un-installed engine, also equipment rooms and an environmentally controlled, acoustical control room for test operators to work in during engine operation. The Acoustic treatment provided by the facility reduces the environmental impact on the surrounding area by reducing the sound created by running aircraft engines.

Hush House - Inside

USAF A/F37T-10/T-11 Hush House Exterior

Hush House - Inside

USAF A/F37T-10/T-11 Hush House Exterior

Vital Link is the leading global supplier of USAF Model A/F37T-10/T11 Noise Suppressor Systems, or Hush Houses. The T-10 platform remains the most popular global aircraft acoustical enclosure for intermediate engine testing, with approximately one hundred fifty (150) units having been placed in service since the late 1970s. Vital Link provides the full spectrum of support for the Hush Houses including manufacture and supply, refurbishment and relocation, upgrade and maintenance. Custom commercial variants of the T-10 type facility are also available for sale. The T-10 platform has been proven in service for support of the F-4, F-5, F-15, F-16, F-18 and F-22 aircraft, with engines supported including the J79, J85, F100-PW-100, -200 and -229, F404 and F110-GE-100 and -129. The T-10 supports both in frame and out of frame intermediate engine testing, when used in conjunction with the A/M37T-20 Mobile Engine Test Cell. The Hush House allows for engine testing on the flight line in an environmentally protected aircraft acoustical enclosure, while attenuating sound pressure levels to approximately 85 dBA at two hundred fifty (250) feet or seventy-seven (77) meters. A further advantage of the T-10 is that it is demountable, being designed as ground support equipment, allowing for relocation of the complete facility as missions change.


Hush Houses are also capable of testing un-installed jet engines mounted on a movable test stand with support equipment to supply fuel and air for engine running. This is typically accomplished in the U.S. Air Force by equipping the Hush House with the A/M32T-20 Engine Test Cell. Engine operation and testing in line with the engine OEM requirements is controlled and monitored using a computerized system. Depending on the customer’s requirements and the type of engine data acquisition system utilized, the Hush House can be utilized for full intermediate level testing similar to a traditional engine test cell.

Hush House - Inside

A/F37 T-10 with engine on movable test stand

Hush House - Inside

A/F37 T-10 with engine on movable test stand


The most recent Hush House project commissioned by Vital Link is probably the most advanced facility of it’s kind in the World. This newly designed Hush House facility provides “State of the Art” jet engine test capabilities for installed engine testing for the F16 and Mirage 2000-9 aircraft and for un-installed testing of the F110 engine. The enhanced noise suppression systems incorporated into the design provide excellent noise attenuation at any engine power level. The most advanced facility feature is Vital Link’s Fully Automatic Data Acquisition System or FADAS™. As well as being a high speed, highly accurate engine data capture and control system, the system also includes fully automated engine test capability, and provides complete facility control and self diagnosis with virtually 100% redundancy "built in".

Hush House - Inside

Advanced Hush House with Aircraft in Test Position

Hush House - Outside

Advanced Hush House Exterior View

Other features of our hush houses:



  • Fuel Storage, Metering and Distribution System
  • Engine Air Start and shop air systems
  • An advanced engine test stand / transportation trolley system
  • Fire Suppression System
  • Specially designed and constructed to meet exacting requirements
  • High Performance Acoustics – intake, exhaust and silencing systems
  • OEM Cross - calibration and certification services
Hush Houses - Inside

A/F37 T-10 with aircraft in position