SOUND ABSORPTION

The sound absorption coefficient of materials can be measured in an alpha cabin or impedance tube.

The test procedure of the alpha cabin is based on ISO 354:2003, the test procedure of the impedance tube is based on DIN EN ISO 10534-2:2001-10.

TECHNICAL DATA ALPHA CABIN

Frequency range 400 – 10.000Hz
Sound field Diffuse
Dimensions test specimen 1m x 1.2m (deviation possible)
Specimen type Flat material specimen or parts
Standards Based on ISO 354:2003

 

TECHNICAL DATA IMPEDANCE TUBE

Frequency range     100 – 5.000Hz
Sound field   Normal incidence
Dimensions test specimen Ø 30mm + Ø 100mm (specimen to be extracted)
Specimen type Flat material specimen
Standards Based on DIN EN ISO 10534-2:2001-10

 

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