Alpha cabin

The Alpha Cabin makes it possible to carry out measurements of the acoustic absorption coefficient in diffuse fields.

The Alpha cabin is much smaller in size than a reverberation room (volume: 6.44 m3). The sound absorption of the Alpha cabin itself is also very low: thanks to the high level of sound insulation, background noise in the relevant frequency range is reduced to a minimum.

Alpha cabin principles

Measurements on flat samples, generally 1.2 m by 1 m. Real parts can also be measured, such as motor absorbers.
System recognized throughout the industry and used by vehicle manufacturers and suppliers
The results of the measurements make it possible to establish the specifications of the absorption properties of the NVH products (noise, vibration, hardness)
Fast measurement process
Response to RNES-D-20001 and D49 1977 test procedures

Measurements / calculations made

Absorption performance of flat or complex materials
Measurements of the absorption coefficient α or the equivalent absorption area Aeq from the Sabine formula