Our products are test stations for vibrations and all kinds of noises coming from the mechanisms installed in such products as, e.g. Audi backrest which possesses complex mechanisms inclining it forwards and backwards which may generate noises in the car. In addition, in the electric version, adjusting the backrest is performed with an electric motor which also may be a source of noises and vibrations. We have created our own system of backrest measurement in production conditions. With the surrounding noises from assembly lines we are able to successfully separate it from the noise coming from the backrest itself.