Precision Performance: the Pursuit of Perfect Measurement

Brüel & Kjær employs simulation as a core part of their R&D process to design and test their microphones and transducers. For microphones, they use multiphysics models to analyze the movement of the diaphragm, electromechanical interactions, resonance frequency, and thermal and viscous acoustic losses. This detailed modeling helps predict interactions between the backplate and diaphragm, influencing the microphone's directional characteristics. Simulations also allow them to test different vent configurations for low-frequency sounds, enabling the exploration of new designs and device limits. For vibration transducers, simulation helps design devices that avoid resonance frequencies within the typical range of 10 to 1000 Hz. Mechanical filters are used to cut away undesired signals caused by transducer resonance. This approach allows Brüel & Kjær to quickly and efficiently test new design solutions for various operating scenarios, bringing them closer to achieving high precision and accuracy in their products.