| Acoustics
and Vibration Laboratory
Vibrations and Acoustics/Noise
Control
Non-destructive evaluation
Ultrasonic testing
Reverberation & anechoic chamber testing
Modal analysis
Computer data acquisition
Acceleration, displacement, force, impedance measurements
Fiber optics
Vibrations
The Vibrations Laboratory has a range of acceleration and displacement
measurement equipment with frequency range of 0 to 10 kHz.
Dedicated data recording and analysis equipment is available as
well as personal computer-based systems. The facility supports
a variety of signature analysis procedures and vibrations analysis
studies.
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Currently, utilization of the lab involves preparing the original
rugged, portable equipment used to determine the length of in-situ
wooden
bridge pilings through
random vibration for independent field verification by the Tennessee
Department
of Transportation
(TDOT) on at least 300 pilings over 18 months. The project will
accomplish several goals, including moving beyond only wooden pilings
to test both steel and concrete as well, creating user confidence
for TDOT officials, upgrading software to incorporate the latest
improvements in automated estimation processes, and refining hardware
to
enhance the data obtained and improve the durability and ruggedness
of the equipment.
Acoustics and Noise Control
Tennessee Technological University
owns the most extensive noise control facility in the State of Tennessee
with two adjacent reverberation rooms and an anechoic chamber. A
typical array of sound measuring equipment is available and includes
sound level meters and analyzers, function generators, rotating
boom, noise sources and noise dosimeters.
The small reverberation room has a volume of 173 m3 and can be used
for high frequency sound measurements. The large reverberation room,
with a volume of 305 m3, is used for low frequency noise measurement.
This room was designed and built with a spring suspension system in
order to operate independently and to isolate it from external low
frequency vibrations. Comparative sound power or absorption measurements
can be made in either room, based on the frequencies of interest.
Windows of several sizes are also available between the two rooms
so that when a device is mounted there, inlet and outlet noise can
be separated and measured independently or transmission properties
can be measured. The large reverberation room is not yet certified
but meets ANSI and ISO standards for determination of sound power
levels and absorption measurements.
For more information regarding acoustics and
vibrations research and opportunities, contact Dr. Sally
Pardue, 931.372.6375 or SPardue@tntech.edu
or Dr. Corinne Darvennes, 931.372.3253 or CDarvennes@tntech.edu.
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