Semi-anechoic chamber : testing and measurements
CEVAA provides acoustic testing in a semi-anechoic chamber. We carry out free-field acoustic studies and noise analysis.
Free field acoustic tests in a semi-anechoic chamber
It allows free field acoustic measurements to be made on small specimens such as solenoid valves up to large volume products such as refrigerated truck cabins.
The presence of the chassis dynamometer in this room also makes possible operational tests on vehicles. From automotive to aeronautics or aerospace, via rail and household appliances, the business sectors of the companies that use it are very varied.
The semi-anechoic chamber of the CEVAA is equipped with absorbing wedges and is decoupled from the infrastructure of the rest of the building, which makes it impervious to vibrations and external noise. The assembly is coupled to a control room which allows the programming of the chassis dynamometer, the acquisition and the processing of data.
Applications
- Radiated noise
- Vehicle interior noise, special machines
- Intake and exhaust vent noise
- Identification of noise sources by analysis of transfer pathways (airborne and structure-borne contributions)
- Sound power measurements according to ISO 3745
- Directivity measurements
- Acoustic imaging
- Diagnosis of vibro-acoustic problems
Features of the chamber
- Dimensions of the room 13.4 x 10.4 x 5.5 m
- Background noise level 13 dB(A)
- Cut-off frequency (ISO 3745) 40 Hz
- 6 dB decay law: compliant with ISO 37454 from 40 Hz to 12.5 kHz
- Chamber suspension natural frequency: 12 Hz
The CEVAA can make the Semi-Anechoic Chamber available to its customers (with or without the use of the chassis dynamometer) over a short period of time or over several days or weeks. Carrying out your tests in a calm environment is a real plus that we can bring to you.
For more information, contact us to discuss technically on your needs!