Military and Government

ICD 705 Acoustical Testing Considerations for SCIF and SAPF areas

ICD 705 is a wide ranging document that concerns itself with all aspects of site security for secure facilities. Our focus is to provide acoustical testing of SCIF and SAPF areas to satisfy the acoustical testing requirements.

We have provided ICD 705 compliant testing in SCIF and SAPF secure facilities at United States Military and governmental agencies around the world.

From Guantanamo Bay to Bahrain, to Weisbaden, Germany, all around the CONUS (and Pearl Harbor as well) we have worked with contractors of all sizes, as well as directly with governmental agencies to ensure that secure facilities perform according to specification.

We can also provide assistance during the design and construction phase, as well as provide information and design for remediation of SCIF and SAPF areas through field testing and computer based modeling of wall, floor, and ceiling assemblies.

The following parameters as detailed in ICD 705 Version 1.4:

A. Overview
1. This establishes DNI guidelines to protect classified conversations from being inadvertently overheard outside a SCIF.
2. This is not intended to protect against deliberate technical interception of audio emanations.
B. Sound Group Ratings
The ability of a SCIF structure to retain sound within the perimeter is rated using a descriptive value, the Sound Transmission Class (STC). To satisfy the normal security standards of SCIFs, the following transmission attenuation groups have been established:
Sound Group 3 – STC 45 or better. Loud speech from within the SCIF can be faintly heard but not understood outside of the SCIF. Normal speech is unintelligible with the unaided human ear.
Sound Group 4 – STC 50 or better. Very loud sounds within the SCIF, such as loud singing, brass music, or a radio at full volume, can be heard with the human ear faintly or not at all outside of the SCIF.
C. Acoustic Testing
1. Audio tests shall be conducted to verify standards are met. Tests may be instrumental or non instrumental as approved by the AO. Test method used shall be detailed in the CSP.
2. Instrumental Acoustic Tests:
a) Only those with training on audio testing techniques shall conduct instrumental acoustic tests
b) With all SCIF doors closed, all perimeter walls and openings (e.g., air returns, doors, windows, etc.) shall be tested along multiple points to ensure that either Sound Group 3 or 4 is met.
c) Audio test sources shall have a variable sound level output.
d) The output frequency range shall include normal speech.
e) Test speakers shall be placed six feet from the test wall and 4 feet off the floor.
f) Audio gain of the test source shall produce “loud or very loud speech” as defined by Sound Group 3 and 4 levels respectively.
g) As an alternative, instrumented testing may be performed to Noise Isolation Class (NIC) standards. Results shall comply with NIC 40 for Sound Group 3 and NIC 45 or Sound Group 4
Contact us today to speak with one of our consultants about your project.
You can reach us at 1-800-665-0080 or feel free to email us at

Noise and Sound Mitigation Consulting

While we are well known for providing noise, vibration, air-quality, and other environmental testing, you may not realize that we also provide noise and sound mitigation consulting services. Our experienced technicians (in conjunction with consulting professional engineers and other consultants) can work with your organization to provide relief for many common issues such as:

  • Open floorplan noise in call centers
  • Unwanted sound transmission in medical and dental offices
  • Noise and vibration emanating from Crossfit and other gym and workout facilities
  • HVAC and other building equipment whether on the ground or roof-mounted
  • Unpleasant room acoustics in restaurants, nightclubs, and auditoriums
  • Machine noise in factories, distribution centers, and retail establishments
  • Noise from playgrounds and recreational areas

Contact us today at (or call us toll-free at 800-665-0080) to find out how we can provide the solutions for your noise and sound issues.

SCIF (Sensitive Compartmented Information Facility) and SAPF (Special Access Program Facility) Testing Services

We provide testing for Sensitive Compartmented Information Facility (SCIF) areas for the Military and Defense contractors.

On-Site Acoustic Testing provides ASTC (Apparent Sound Transmission Class), NIC (Noise Isolation Class), AIIC (Apparent Impact Insulation Class), OITC (Outdoor Indoor Transmission Class), Speech Intelligibility Testing for SCIF and SAPF areas.

We understand how critical it is that secure areas really are secure, and we take this responsibility very seriously. To this end, we are proud to use the Bruel & Kjaer 2270 analyzer running the BZ-7229 dual channel building acoustics software. Additionally, we can provide your organization with critical information concerning flaws in the overall audio/vibrational security of the SCIF or SAPF area.

In addition the the protocols mentioned above, we can provide FFT analysis of noise and vibration that is present in (or transmitted from) the SCIF or SAPF area, or areas adjacent to the SCIF or SAPF area.

Lastly, we can provide infrared thermographic (FLIR) scans of wall, ceiling, and floor partitions to find “hidden” penetrations or other flaws.

Contact one of our consultants today at 1-800-665-0080 or email us at

Marine Noise, Vibration, and Air Quality Testing

We are pleased to announce that we are now able to provide noise and vibration testing aboard marine vessels of all kinds. Whether your concern is sound propagation from engine rooms to passenger cabins, vibration levels aboard oil and gas exploration ships, or indoor air quality testing in engine rooms, machinery areas, and cargo holds, we get the job done! Our experienced field technicians are able to provide testing to ISO, ASTM and IMO specifications aboard your ship, fixed, or movable marine installation. We also offer noise transmission testing (ASTC, NIC, AIIC) aboard vessels of all sizes and types. Contact us today to discuss your project!

Call us today at 1-800-665-0080 or email us at to discuss your project with one of our consultants.