Facilities

The VAL facilities consist of four laboratories which are dedicated to fundamental studies in sound and vibration. Click the links below or in the menu on the left to learn more about each Lab:

• Modal Lab
• Airport Lab
• Anechoic and Reverberation Chambers
• National Institute of Aerospace

Equipment

• Durham aneochoic room of inside dimensions (wedge tips to wedge tips) 5.4*4.1*2.4 m and with a cutoff frequency of 100 Hz
• Durham reverberant chambers (transmission chambers) of volume 40.2m^3 (source chamber) and 40.2m^3 (receiving chamber) connected by a test section
• Randolph anechoic room of dimensions 4.5*2.2*2.5 m and with a cutoff frequency of 250 Hz
• Randolph reverberant chambers (transmission chambers) of volume 49.6m^3 (source chamber) and 47.8m^3 (receiving chamber) connected by a test section
• 2 Dual channel FFT B&K analyzers (2032 and 2034)
• 1 Portable dual channel FFT B&K analyzer (2048)
• 1 16-channel Zonic analyzer based on Macintosh
• 1 Polytech laser vibrometer (OFV-501/OFV-2600)
• B&K sound levelmeter (2231)
• B&K sound intensity probe (3520)
• Automated 1D traverse for array of 90 phase matched microphones (airplane)
• Automated 2D traverse for vibration measurements of planar structures
• Automated 2D traverse for vibration measurements of cylindrical structures
• Automated 1D traverse for acoustic measurement (anechoic chamber)
• B&K standing wave apparatus (4002)
• Various signal generators
• Various shakers
• Various piezoelectric inertial actuators
• Various microphones
• Various accelerometers
• Various microphone and accelerometer calibrators
• Various power amplifiers, charge amplifiers and pre-amplifiers
• Various filters
• Various oscilloscopes
• 3 GPIB cards
• 6 DSP boards TMS320C30 and 1 DSP board TMS320C31 with 5 expansion board sets
• 1 DSP board TMS320C40
• 2 C40 DSP boards
• M67 and Q67 DSP boards
• Various LMS active control systems for MIMO narrowband and broadband noise fields
• IBM RISC workstation with a suite of FEM/BEM numerical codes for structural and acoustic analysis