In support of the research activities mentioned above, the Acoustic Laboratory has the following facilities and instrumentation:
A Reverberation Chamber of volume 15.4 cu.m (94 cu.ft) with wall absorption coefficients of 0.06 or less from 250 Hz. and upwards. The chamber acts as a source room for Random Sound Absorption Coefficient, Machinery Sound Power Assessment, and for Sound Transmission Loss.
An Hemi-Anechoic Chamber of 5.57 cu.m (34 cu.ft) dimension and 0.96 or better absorption, from 100 Hz. upwards. The chamber acts as a source room for machine directivity measurements, and as a reception room for Sound Transmission Loss Measurement via the Point to Point or Scanning Intensity Technique.
A series of Impedance Tubes ranging from 20 x 20 cm. cross section to 2.54 cm. diameter. These Tubes allow for Material Normal Absorption or Impedance Evaluation from 40 Hz. to 5 KHz. via the Transfer Function Technique. The tubes may also be employed for the Sound Transmission Assessment of small samples.
An Omni Directional Sound Source, employed for the Objective Evaluation of Room Acoustic Criterion
A series of instrumentation:
The Norsonics Analyzer Type 840, employed for the following:
Time Series evaluation of Transients or Cyclical Phenomena.
In situ Sound Power Assessment via the Intensity Technique.
Room Acoustic Assessment / Reverberation Time via the Impulse Response Technique.
Room Acoustic Directional Response via the Sound Intensity Technique.
Sound Intensity Mapping in situ or from Sound Transmission Loss Evaluation.
Discrete Frequency Analysis of Sound or Vibration via Fourier Transform
Additional Sound Intensity and Discrete Frequency Analyzer, capable of sound power evaluation and Cepstrum Analysis.
Numerous Sound Pressure Meters for standard sound assessment / statistical analysis for discrete, third octave, octave, and broad band assessment.
Transducers ranging from Sound Intensity Probes having pressure / zero intensity characteristics in excess of 20 dB, Directional and Diffuse
Microphones and a series of accelerometers and fixing conditions.