The Structural Acoustic Loads and Transmission Facility (SALT) is a reverberant-anechoic test suite for transmission loss, absorption, and qualification testing. The 278 m³ reverberant source room is structurally isolated from the building, and has splayed walls and ceiling to reduce the impact of standing waves in the room. A 1.4m x 1.4m window connects the reverberant source room with an anechoic chamber (337 m³ wedge tip to wedge tip).
More detail on the capabilities of the room can be found in a conference paper documenting the facility.
 SALT Floorplan |
 Qualification testing in reverberant source room |
Reverberant Source Room
Anechoic room configured for transmission loss testing
- Qualification testing
- Overall SPLMax= 154 dB (25 – 2500 Hz)
- Diffuse acoustic field generation (f > 80 Hz)
- Typical SPL = 110 dB (80 – 10,000 Hz)
Anechoic Receiving Room
- Free field radiation (f > 80 Hz)
- Transmission loss panels to 59″ x 59″
Types of Testing
- Transmission loss
- Acoustic absorption
- High-intensity noise qualification testing
Types of Measurements
- Acoustic intensity
- Acoustic pressure
- Spherical and planar Near-field Acoustic Holography (NAH)
- Laser vibrometry
- Vibration and strain
Contact
Randolph H. Cabell (randolph.h.cabell@nasa.gov)
(757)-864-5266