We evaluate the issues associated with the vibroacoustic performance of machinery components, industrial installations, components, and vehicles, analyse influencing factors, and propose, design and implement solutions.
Random noise detection and analysis
The gradual reduction of vehicle operation noise has increasingly turned the spotlight on random noise.
This noise (squeak and rattle) is indicative of the malfunction or premature ageing of parts. Therefore, it is associated with an improper design of parts or fasteners and commonly leads to an important problem of claims due to poor quality.
We participate in the interior design of several vehicle models during their design and development phase to prevent the appearance of random noise during the service life of components
We have developed a methodology and software based on computational analysis by means of finite element software that detects potential places susceptible of experiencing these phenomena between parts due to geometric and material issues, random excitation, and boundary conditions, and enables us to eliminate said noise.
We perform squeak and rattle measurements in test benches and qualitatively analyse them by means of rattle equipment and high-frequency fatigue and durability tests.
We make characterisations of tribological properties – friction, lubrication and wear – by means of a machine for measuring stick-slip.
Sound quality studies
In many cases, instead of reducing noise, we conduct studies to design pleasant sounds. A good quality gives the product a good image, informs of its proper operation, and allows to differentiate it from other products.
Sounds are recorded and played at a frequency range similar to that of the human ear by means of a binaural artificial head; the subjective evaluation (jury test) thereof is compared to the objective evaluation (psychoacoustics: loudness, sharpness, roughness, tonality and word intelligibility index) in order to design pleasant sounds.