The resources of the Integrated Acoustics Laboratory principally are structured about three test rooms: a full anechoic room, a semi-anechoic room, and a reverberation room. The reverberation room and semi-anechoic room are joined by a transmission loss opening. In addition to the test rooms, the Active Control laboratory is an element of the IAL, with resources focused on vibration control research.

Anechoic Room

The interior clear dimensions are 18' x 18' x 14'. The low frequency cutoff of the room is 80 Hz. Provisions exist for installation of an expanded metal floor for heavier test articles.

Semi-anechoic Room

The interior clear dimensions are 19.5' x 25.7' x 14'. The low frequency cutoff is 80 Hz. The semi-anechoic room and the reverb room are joined by an 8' x 8' transmission loss opening.

Reverberation Room

The interior clear dimensions are 27' x 21' x 16.5'. The room is equipped with a rotating boom. Fixed diffusors are currently being qualified per C423 performance. The semi-anechoic room and the reverb room are joined by an 8' x 8' transmission loss opening.

Instrumentation Supporting the Test Rooms

• Anechoic room
  • HP VXI data acquisition system with 32 channel 52 kHz A/D, 4-channel arbitrary source, 20 MHz A/D, 16 channel D/A, 4 GB local disk.
  • HP C110 workstation as VXI front end, LMS CADA-X system, Matlab acquisition
• Semi-Anechoic Room
  • VXI Technology 16 channel data acquisition system, 4-channel arbitrary source
  • PC front end with Firewire interface to VXI chassis
• Reverberation Room
  • VXI Technology 16 channel data acquisition system, 4-channel arbitrary source
  • PC front end with Firewire interface to VXI chassis
• DEC ALPHA analysis workstations (2)
• Software resources include LMS CADA-X, MSC NASTRAN, COMET/Acoustics, LMS SYSNOISE

Related Instrumentation Resources

• Polytec PSV 2000 scanning laser vibrometer
• Large selection of Larson-Davis microphones, preamplifiers, power supplies, calibrators
• Larson-Davis intensity probe, probe calibrators
• Larson-Davis model 824 , 820 and 800B sound level meters
• Large selection of Kistler impact hammers and accelerometers, including tri-axial accelerometers
• LDS exciter systems in 2, 5, 10 and 50 lbf range, and associated power supplies
• Aerodynamic sound power reference source
• Accelerometer and microphone calibrators
• 16 channel TEAC DAT recorder, 8 channel Sony DAT recorder, variety of other recorders.
• Siglab DSP-50 two-channel anlyzer system
• Computer controlled rotational positioner system
• Computer controlled X-Y positioner system