Acoustic Chambers

Acoustic Chambers

The School of Mechanical Engineering has two reverberation chambers for use in sound transmission loss testing and sound aborption testing.

For sound transmission loss testing, the sample is installed in a hole in the wall between the two rooms. Sound in the source room will then pass through the test sample into the receiver room, where a traversing microphone or fixed microphones measure the sound pressure level in the room.

Source Room

The source and receiver rooms are used for transmission loss testing. These facilities are used for research, development and can be hired for use.

  Source Room Specifications
Dimensions 6.085 x 5.175 x 3.355 m
Volume 105.6 m^3
Surface Area 138.5 m^2
Opening Area 9.71 m^2
Small Test Panel Opening 1100 wide x 1605 tall mm
Small Test Panel Size 1000 wide x 1505 tall mm (inside clamping frame)
Volume between chambers 9.42 m^3
Rotating Diffuser Hemi-conical shape
2.5m height
1.5m diam top
3.0m diam bottom
Swept Volume 10.31m^3

Receiver Room

The receiver room is used for acoustic transmission loss, noise reduction, insertion loss testing, as well as measurement of sound power from articles. The room as several static diffusers and a rotating diffuser which is used to better dispurse the sound in the chamber to create a uniform sound field.

  Receiver Room Specifications
Dimensions 6.840 x 5.565 x 4.720 m
Volume 179.7 m^3
Surface Area 193.2 m^2 Including opening area
Opening Area 9.71 m^2
Small Test Panel Opening 1100 wide x 1605 tall mm
Small Test Panel Size 1000 wide x 1505 tall mm (inside clamping frame)
Volume between chambers 9.42 m^3
Rotating Diffuser Hemi-cylindrical shape
2.4m height
3.5m diam
Swept Volume 23.09 m^3

Anechoic Room

The anechoic room is used to measure acoustic radiation patterns from objects and when a quiet measurement environment is required. The room has aluminium floor plates that can be removed to help reduce reflections from the floor.

  Anechoic Room Specifications
Dimensions 4.79m x 3.90m x 3.94m
Volume 73.6 m^3