Acoustics and Non-Destructive Evaluation (NDE) Lab

Dr. Corrine Darvennes (left) preparing equipment in the Reveration Room for testing

Tennessee Technological University owns one of the most extensive noise control facilities 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.

Foam wedges cover all six walls of the Anechoic Chamber for fully anechoic measurements

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.